DE102016118270A1 - Brake disc tool for machining a brake disc blank, brake disc manufacturing system and method for producing a brake disc - Google Patents

Abstract

The invention relates to a brake disk tool for processing a brake disk blank (12), having (a) a first cutting tool (14) arranged to machine a first braking surface (34) of the brake disk blank (12), (b) a second cutting tool (16) which is arranged for machining a second braking surface (36) of the brake disk 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) towards 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.

Description

The invention relates to a brake disk tool for machining a brake disc 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 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, a second braking surface of the brake disc blank, (c) a first mold for forming the first braking surface, (d) a second forming tool for forming, in particular for smooth or deep 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 brake blank arranged between the cutting tools and the forming tools can be simultaneously machined and simultaneously simultaneously rolled on its two braking surfaces.

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 that 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 a guide guiding the rolling body. 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 that Torque that results 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, then both braking surfaces can be simultaneously both flared and reshaped, in particular rolled. 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 extending along a cutting tool straight line, wherein the cutting tool straight has a distance from an axis of rotation of the rotational movement 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 automatically setting, in particular regulating, 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 rotational axis, (iii) the first forming tool is engaged at a first forming engagement point, which is a first Forming distance has time from the axis of rotation, (iv) the second forming tool in a second forming engagement point is engaged, which has a second deformation distance from the axis of rotation and (v) the cutting tools and the forming tools are movable so that a first distance difference between the first cutting distance and a first forming distance and a second distance difference between the second cutting distance 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 disk blank, over a braking surface plane, in which the first braking 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 disc blank by means of the brake disc rotating device - in a direction of rotation opposite to the first direction of rotation or the same direction of rotation - while simultaneously processing 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 straight line extending along a cutting tool straight line, wherein the cutting tool straight line is at a distance from a rotational axis of the rotational movement is less than half, preferably less 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 in accordance with a preferred embodiment, can be arranged so that they are in contact with the braking surface at at least substantially the same axial distance from the axis of rotation as the cutting tool. 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 over a braking surface plane in which the braking surface is located, is particularly small.

Preferably, at least the first forming tool is mounted to move on a forming tool path extending along a forming tool straight as the cutting tool moves on the cutting tool path, wherein the forming tool straight line passes from the cutting tool straight line a separation plane is separated, in which the axis of rotation runs. In other words, the cutting tool advances, the forming tool travels. 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 forming tool straight line and the separating plane is at most 50%, preferably at most 30%, of the distance between the cutting tool straight line (g _Z ) and the separating plane (T). differs. 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 mathematically, it is also possible for the two distances to be slight differ from each other. 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, which has a second forming distance from the axis of rotation and (v) the cutting tools and the forming tools are moved so that, at least as long as 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 cutting distance and a second forming distance remains constant and / or at most s o is 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 lies.

In other words, it is favorable 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 guided guided, in particular linearly guided. 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 one Movement that counteracts the vibration movement. 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.

Preference is given to a method comprising the steps of: (i) feeding the cutting tools and the forming tools onto 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 comprises the following steps: (i) moving the forming tools and the cutting tools radially inwardly with at least substantially the same radial movement components, then (ii) reducing, in particular stopping, the radially inward movement of the cutting tools and ( iii) radially inward movement of the forming tools.

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%.

In the following the invention will be explained in more detail with reference to the accompanying drawings. It shows

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

2 with the sub-figures 2a-2d, an inventive brake disk tool according to a second embodiment,

3 1 is a schematic view of a brake disk manufacturing system according to the invention for carrying out a method according to the invention,

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

5 with the sub-figures 5a-5f an inventive brake disk tool according to a fourth embodiment,

6 with the sub-figures 6a-6f an inventive brake disk tool according to a fifth embodiment,

7 with the sub-figures 7a-7e, an inventive brake disc tool according to a sixth embodiment, and

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

1 shows in Part 1a a brake disc tool according to the invention 10 for processing a brake disc blank 12 so that one Brake disc is created. The brake disc tool 10 owns a first cutting tool 14 , a second cutting tool 16 (see. 1b ), 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 in a first tool holder 22 picked up, the second cutting tool 16 is like the first cutting tool 14 built and a second tool holder 24 attached.

The forming tools 18 . 20 are designed as rolling tools and have respective rolling bodies 26 . 28 , each in a leadership 30 . 32 are included. The forming tools 18 . 20 are pressurized 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 process a first braking surface 34 , The second cutting tool 16 and the second forming tool 20 are designed for processing a second braking surface 36 parallel to the first braking surface 34 runs. The brake disc blank 12 also has a hub section 38 , which has a braking surface plane E, in which the first braking surface 34 lies, axially overhangs. Between the hub section 38 and the first braking surface 34 runs a circumferential groove 40 ,

The brake disc tool 10 has a delivery device 42 on, by means of the cutting tools 14 . 16 and the forming tools 18 . 20 can be delivered to each other. In this way, a slice thickness d, that is a distance between the first brake surface 34 and the second braking surface 36 to be set precisely. In the present case, the delivery device comprises 42 a cutting tool feed device 43 for moving the first cutting tool 14 relative to the tool holder 46 ,

In the present case, the cutting tool delivery device comprises 43 the first tool holder 22 and a schematically drawn drive 44 which may, for example, have a drive worm and a rotary drive therefor. The first tool holder 22 is on a tool holder 46 linear in the axial direction with respect to a rotation axis R of the brake disc blank 12 guided. By means of the drive 44 can be the first tool holder 22 therefore relative to the tool holder 46 to be moved.

The second tool holder 24 as well as the forming tools 18 . 20 are also from the tool holder according to one embodiment 46 linearly guided and movable relative to this. In the present embodiment, the delivery device comprises 42 a forming tool feed device 45 for moving the first forming tool 18 relative to the tool holder 46 (please refer 1b ). The forming tool feed device 45 is like the cutting tool delivery device 43 constructed and has a drive 47 on. In 1b is the drive 44 for the sake of clarity not shown.

But it is also possible that each drive both tool holders 22 . 24 moved and another drive both forming tools 18 . 20 , It is also possible that both cutting tools 14 . 16 and both forming tools 18 . 20 relative to the tool holder 46 are designed to be movable by motor. In this case, it is unnecessary for the tool holder 46 relative to the brake disc blank 12 is designed to be movable.

The drive 44 as well as the possibly additional drives can have an electric motor or be driven hydraulically. The drive 44 as well as any drives that may otherwise be present may additionally have at least one hydraulic expansion pad and a pressurized fluid supply connected thereto, which upon increasing a fluid pressure in the hydraulic expansion pad, the respective tool on the brake disc blank 12 move to or from this.

The tool holder 46 is in this case on a linear guide 48 fixed and thus can be moved in a direction perpendicular to a rotation axis R.

1c shows a view from the front of the brake disc tool 10 ,

1d shows that the cutting tools 14 . 16 (see. 1c ) 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 moved along a Zerspanwerkzeug straights g _Z. The first forming tool 18 moves along a forming tool straight line g _U. The cutting tool straight line g _Z crosses the rotation axis R. But it is also possible that it has a non-zero, small distance from the rotation axis R, for example, is smaller than a fiftieth of a Outer diameter D of the brake disc blank 12 , The forming tool straight line g _U runs parallel to the cutting tool straight line g _Z.

According to an alternative method according to the invention, it is possible that the tools 14 . 16 . 18 . 20 be moved radially inward out of engagement. After that, the cutting tools 14 . 16 on the radially inner edge of the braking surfaces 34 . 36 engaged and moved radially outward. In addition, the forming tools 16 . 18 engaged. In this way, the braking surfaces 34 . 36 simultaneously spanned and reshaped while the tools 14 . 16 . 18 . 20 move radially outward.

2 shows a second embodiment of a brake disk tool according to the invention 10 , 2d shows that - unlike the embodiment according to 1 - The straight lines g _Z and G _U each have the same distance from the axis of rotation R and thus of a separation plane T, in which the axis of rotation extends, have. In this way, the first cutting tool 14 and the rolling body 16 be arranged in the same or in a substantially same radial distance from the axis of rotation R.

In other words, the first cutting tool contacts 14 the braking surface 34 in a first chip engagement point P ₁₄ and the first forming tool 18 in a first forming engagement point P ₂₆ .

A distance difference Δr indicating the difference of the radial distances of the points P ₁₄ and P ₂₆ from the rotation axis R is small. In particular, the distance difference Δr is smaller than a groove width n. Groove width is the radial distance between the first braking surface 34 and the hub portion 38 (see. 2 B ). Preferably, the distance difference Δr is smaller than 0.8 times the groove width n.

The second cutting tool 16 lies in a second chip engagement point P ₁₆ (FIG. 2c ) on the second braking surface 36 on and the second forming tool 20 lies with his rolling body 28 in a second forming engagement point P ₂₈ on the second braking surface 36 at. The radial distance of the point P ₁₆ from the axis of rotation R corresponds to the radial distance of the point P ₁₄ . The radial distance of P ₂₈ corresponding to the point P _26th

3 schematically shows a brake disc manufacturing plant according to the invention 50 that is a brake disc tool 10 as well as a machine tool 52 comprising, by means of the brake disc tool 10 relative to a brake disc rotating device 54 is positionable. The brake disc rotating device 54 is designed to receive the brake disc blank 12 , For example, at its hub portion 38 , This can be a deliverable stamp 56 be provided, for example, through holes in the hub section 38 attacks.

An inventive method is carried out, for example, that 54 is recorded. It is then rotated in a direction of rotation ω ₁ . The Zerspander brake disc blank 12 initially on the disc rotator tools 14 . 16 are individually or collectively on the braking surfaces 34 . 36 delivered until a distance between the two corresponds to a given slice thickness d. The cutting tools 14 . 16 are then moved in the radial direction along the straight line g _Z and thereby chop the braking surfaces 34 . 36 ,

The following are the cutting tools 14 . 16 disengaged. In addition, the forming tools 18 . 20 so far on the processed braking surfaces 34 . 36 delivered that the respective rolling bodies 26 . 28 in contact with the braking surfaces 34 . 36 come and transform this. 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.

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

4a shows a third embodiment of a brake disk tool according to the invention 10 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. 4d ) move during machining on respective cutting tool lines g _Z , which extend through the axis of rotation R. These are the cutting tools 14 . 16 , as described above, linearly guided.

The first forming tool 18 is relative to the first cutting tool 14 linearly stored. This is between the first tool holder 22 and the first forming tool 18 a linear axis 58 formed, which can also be referred to as a linear guide. A motor of the longitudinal axis 58 is drawn. The 4a and 4b show the linear axis 58 in a first position, the subfigure 4c shows the linear axis 58 in a second position, in which the first forming tool 18 with a radial component linear relative to the first tool holder 22 is moved.

The second forming tool 20 , this in 4d is partially visible, is like the first forming tool 18 at one Umformwerkzeughalter 60 attached to the tool holder 46 on which the tool holders 22 . 24 are fixed, the linear axis 58 forms. In the present case, the linear axis comprises 58 a dovetail guide and a schematically drawn motor for moving the tool holder 46 relative to the forming tool holder 60 , In this way is also the second forming tool 20 linear relative to the second cutting tool 16 guided. The tool holder or the forming roll holder 60 are on a schematically partially drawn machine tool 61 attached.

The 4a . 4b and 4c show schematically the course of a method according to the invention. First, the forming tools 18 . 20 and the cutting tools 14 . 16 moved radially inward with the same radial motion component. The radial motion component is determined by projection of the corresponding motion vector on the cutting tool line g _Z. Is the in 4b shown state achieved by the cutting tools 14 . 16 the braking surfaces 34 . 36 (see. 4e ) have machined completely, the radially inward movement of the cutting tools 14 . 16 stopped. The forming tools 18 . 20 be moved relatively inward, ie in the feed direction, until the two braking surfaces 34 . 26 completely rolled. After that, all the tools 14 . 16 . 18 . 20 disengaged and moves the brake disc tool radially outward.

5 shows a further embodiment of a Bremsscheirade invention g _Z and the forming tool line g _U a spread angle, the zero ben tool. In this embodiment, the cutting tool is different. In the present case, the straight lines g _Z , G _U pass through the axis of rotation R, which represents a preferred, but not necessary embodiment.

Both the tool holders 22 . 24 (see. 5b ) as well as the forming tools 18 . 20 (see. 5c ) are linear to the tool holder 46 and are moved either simultaneously or sequentially. The 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 procedure are the tools 14 . 16 . 18 . 20 in a radially outer position. They are moved radially inward in the course of the process and thereby become 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.

6 shows a fifth embodiment of a brake disk tool according to the invention 10 in which the cutting tool straight line g _z and the forming tool straight line g _U likewise run through the axis of rotation R. Unlike the embodiment according to 5 is the tool holder 46 linear on the machine tool 61 movably guided 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 toolholder 46 automatically guided linearly movable in this machine tool.

7 shows an inventive brake disc tool 10 in which all tools 14 . 16 . 20 each automatically relative to the tool holder 46 are movably arranged. The tool holder 46 is, for example linear, guided on the machine tool. As the 7c and 7d show, it is possible to use all the tools 14 . 16 . 18 . 20 regardless of the other tools in and out of engagement with the brake disc blank 12 bring to. In other words, the cutting tools 14 . 16 so with the tool holder 46 connected, that a common delivery movement can take place. In addition, the rolling elements 26 . 28 relative to the cutting tools 14 . 16 to be moved. This type of attachment of the tools 14 . 16 . 18 . 20 is also possible for all other embodiments.

8th shows an inventive brake disc tool 10 that is a vibration damping device 62 has, for example, by means of compressed air or a pressure fluid against the first braking surface 34 is pressed. Vibrations lead to an oscillation of the vibration damping device 62 which are 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 is dispensable.

LIST OF REFERENCE NUMBERS

10

 Brake disc tool

12

 Brake disc blank

14

 first cutting tool

16

 second cutting tool

18

 first forming tool

20

 second forming tool

22

 first tool holder

24

 second tool holder

26

 roller body

28

 roller body

30

 guide

32

 guide

34

 first braking surface

36

 second braking surface

38

 hub portion

40

 groove

42

 infeed

43

 Cutting tool-advancing device

44

 drive

45

 -Forming tool infeed

46

 toolholder

48

 linear guide

50

 Brake disc building facility

52

 machine tool

54

 Brake disc rotating device

56

 stamp

58

 linear axis

60

 Umformwerkzeughalter

61

 machine tool

62

 vibration damping device

e

 Braking surfaces level

d

 slice thickness

D

 outer diameter

g _Z

 Cutting tool straight

g _U

 Forming tool straight

T

 Parting plane

n

 groove width

P

 Touch point

R

 axis of rotation

.delta..sub.R

distance difference

ω

direction of rotation

σ

splay

Claims (17)

Brake disc tool for processing a brake disc blank ( 12 ), with (a) a first cutting tool ( 14 ) arranged for cutting a first braking surface ( 34 ) of the brake disc blank ( 12 ), (b) a second cutting tool ( 16 ), which is arranged for cutting 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 delivery device ( 42 ) for delivering the cutting tools ( 14 . 16 ) and the forming tools ( 18 . 20 ), so that one 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. 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 ) having. Brake disc tool according to one of the preceding claims, characterized in that the feed device ( 42 ) for delivering the cutting tools ( 14 . 16 ) and the forming tools ( 18 . 20 ), so that the brake disc blank ( 12 ) simultaneously on both braking surfaces ( 34 . 36 ) Spanbar and simultaneously also simultaneously rollable, is formed. Brake disc tool ( 10 ) according to one of the preceding claims, characterized by (a) a tool holder ( 46 ) for fastening the brake disk tool ( 12 ) on 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 or depending on the first cutting tool ( 14 ) relative to the tool holder ( 46 ) having. Brake disc manufacturing plant ( 50 ) with (a) a machine tool ( 52 ), which is 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 also rotates during operation) and (b) a brake disc tool ( 12 ) according to one of the preceding claims, which is so to the brake disc rotating device ( 54 ) is arranged that one of the brake disc rotating device ( 54 ) and rotated brake disc blank (R) at its two braking surfaces ( 34 . 36 ) is simultaneously machinable by a turning operation and / or simultaneously by forming, in particular rolling. Brake disc manufacturing plant ( 50 ) according to claim 5, characterized by a control unit which is designed for automatically carrying out a method with the steps: (i) rotating the brake disc blank ( 12 ) by means of the brake disc rotating device ( 54 ) while simultaneously machining the brake surfaces ( 34 . 36 ) by means of the cutting tools ( 14 . 16 ) and (ii) thereafter rotating the brake disc blank ( 12 ) by means of the brake disc rotating device ( 54 ) while simultaneously processing the braking surfaces ( 34 . 36 ) by means of the forming tools ( 18 . 20 ). Brake disc manufacturing plant ( 50 ) according to claim 6, characterized in that the control unit is set up to automatically - move the cutting tool ( 14 when machining on a path that extends along a cutting tool straight line (g _Z ), - wherein the Zerspanwerkzeug straight line (g _Z ) has a distance from an axis of rotation (R) of the rotational movement, which is smaller than half, in particular a twentieth, an outer diameter (D ₃₈ ) of a hub portion ( 38 ) of the brake disc. Brake disc manufacturing plant ( 50 ) according to claim 5, characterized in that the control unit is set up for automatically - moving the cutting tool ( 14 ) when machining on a cutting tool path that extends along a cutting tool straight line (g _Z ), - wherein the cutting tool straight line (g _Z ) has a distance from the rotation axis (R) of the rotational movement, which is at least one twentieth, in particular at least one fiftieth of an outer diameter (D ₃₈ ) of a hub section ( 38 ) of the brake disc. 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 (g _U ) when the cutting tool ( 14 ) moves on the cutting tool path, - wherein the forming tool straight line (g _U ) of the cutting tool straight line (g _Z ) by a separating plane (T), in which the axis of rotation extends, is separated. Brake disc manufacturing plant ( 50 ) according to one of the preceding claims, characterized in that - the first forming tool ( 18 ) relative to the first cutting tool ( 14 ), in particular linearly guided, is, and / or - the second forming tool ( 18 ) relative to the second cutting tool ( 14 ), in particular linearly guided, is. 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 towards each other in a radially inward movement. Method for producing a brake disk, in which a brake disk tool ( 10 ) according to one of claims 1 to 4 and / or a brake disc manufacturing plant ( 50 ) is used according to one of the preceding claims 5 to 11. Method according to claim 12, characterized in that (i) the first cutting tool ( 14 ) is engaged in a first cutting engagement point (P ₁₄ ) 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 (P ₁₆ ), which has a second cutting distance from the rotation axis (R), (iii) the first forming tool ( 18 ) is engaged in a first forming engagement point (P ₂₆ ) having a first forming distance from the rotation axis (R), (iv) the second forming tool (P) 20 ) is engaged in a second forming engagement point (P ₂₈ ) 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, as long as all the tools are engaged, a first distance difference (Δr ₁ ) between the first cutting distance and a first forming distance and a second distance difference (Δr ₂ ) between the second cutting distance and a second forming distance constant remains and / or is at most as large as a radial distance between a braking surface ( 34 . 36 ) and a hub section ( 38 ) of the brake disc blank ( 12 ), over a braking surface plane (E), in which the first braking surface ( 34 ), projects axially. Method according to claim 12 or 13, characterized by the steps of: (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 ). Method according to claim 12 or 13, characterized by the steps of: (i) feeding the cutting tools ( 14 . 16 ), then (ii) rotating the brake disc blank ( 12 ) in a first rotational direction (ω ₁ ) and thereby cutting the braking surfaces ( 34 . 36 ), then (iii) rotating the brake disc blank ( 12 ) with opposite direction of rotation (ω ₂ ) and thereby simultaneously forming, in particular deep-rolling or smooth-rolling, the two braking surfaces ( 34 . 36 ). Method according to 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 motion components radially inward, then Stopping a radially inward movement of the first cutting tool ( 14 ) and - radially inward advancement of the first forming tool ( 18 ), and / or - moving the second forming tool ( 20 ) and the second cutting tool ( 16 ) with the same radial movement components radially inwardly, then - stopping a radially inward movement of the second cutting tool ( 16 ) and - radially inward further movement of the second forming tool ( 20 ). Method according to one of claims 12 to 16, characterized by the steps: - moving the cutting tools ( 14 . 16 ), and possibly the forming tools ( 18 . 20 ), out of engagement radially inward, - engaging the cutting tools ( 14 . 16 ), and if necessary, the forming tools, and thereafter - moving the cutting tools, and possibly the forming tools ( 16 . 18 ), radially outward while simultaneously machining and forming the braking surfaces.

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