EP3880384B1 - Device and method for the cold-forming shaping of workpieces - Google Patents

Description

The invention relates to the field of producing profiling, in particular by cold forming, for example in rotationally symmetrical solid or hollow parts. It refers to devices and methods according to the generic terms of the patent claims (see WO 2007/009267 A1 )

Various methods are known from the prior art for cold-forming solid or hollow parts.

It is known, for example, to provide hollow parts with a profiling in a single step by forming an unprofiled sheet metal part using a device which has a large number of tools distributed over a circumference, which are used when the sheet metal part is inserted into the device where To create profile gaps, intervene in the sheet metal part. A corresponding method for producing an internally and/or externally toothed cup-shaped sheet metal part with teeth extending towards the center axis of the cup is available, for example DE102014002971A1 known.

The disadvantage of such methods is that they are very inflexible because, for example, a change in the shape of the profile gap requires replacing all tools and a change to processing sheet metal parts with a different diameter requires the creation of a new, appropriately adapted device.

In other cold forming processes, workpieces are periodically hammered by rotating tools to create a profile, as shown, for example WO 2005/075125 A1 is known. This process is very flexible in use because a switch to other products or changed product specifications is possible with very little effort. On the other hand, continuing a profiling close to a shoulder that protrudes radially outwards is out of the question WO 2005/075125 A1 Known methods are not possible due to the rotating movement of the tools.

For example, a method that allows a profiling to be created in a workpiece up close to an outwardly projecting shoulder of the workpiece is available WO 2007/009267 A1 known. In the method described there, a cylindrical thin-walled hollow part, which sits on an externally profiled mandrel, is cold-formed with a profiling that runs essentially parallel to the longitudinal axis of the hollow part by suddenly hammering at least one profiling tool on the hollow part from the outside, radially to the longitudinal axis of the hollow part is brought. The profiling tool is oscillated in a direction perpendicular to the longitudinal axis, i.e. by a radial, linear back and forth movement on the surface of the hollow part. And the profiling tool is displaced axially relative to the hollow part with a constant radial feed depth until the desired profile length is reached, whereby the machining of the hollow part can be started at an outwardly projecting shoulder of the hollow part.

If there are particularly high demands on surface quality, it may be necessary to follow the process according to WO 2007/009267 A1 post-processing of the hollow part must be carried out because the hollow part is only processed in a short axial section by the profiling tool during each intervention, which can result in a slight, scale-like roughness.

It is an object of the invention to create methods for producing a profile body provided with a profiling and corresponding devices which do not have the disadvantages mentioned above.

For example, it should be possible to convert the method or device for the production of other products or for the realization of changed product specifications easily and cost-effectively.

Another possible object of the invention is to enable profile creation with a particularly high surface quality.

Another possible object of the invention is to enable profile creation with particularly high productivity.

Another possible object of the invention is to enable profiling close to a workpiece projection, for example close to an outwardly projecting shoulder of the workpiece to be profiled.

Another possible object of the invention is to enable profiling between two profiling boundary structures and up close to them. At least one of these tasks can be solved by the method according to claim 1 or by the device according to claim 13.

In the method, a tool holder and with it a tool that is held by the tool holder is driven to a complex movement that has at least two components, namely a rotating movement, for example along an orbit, similar to a planet, and a rotational movement around the own axis. These two movements are synchronized with each other. The orbiting movement can be a periodic movement. A corresponding drive device can be provided to generate the rotary movement.

Due to the rotating movement, the tool holder and thus also the tool can be periodically brought up to a workpiece to be machined and have a forming effect on it and then move away from the workpiece again in order to then approach it again, etc. For example, the tool can be used once per revolution (or also with every second or every third revolution) can be brought into forming engagement with the workpiece.

Due to the rotational movement around its own axis together with the orbital movement, the tool can carry out a tool movement on the workpiece that includes a rolling movement. The tool can therefore have an effective area that carries out an at least partially rolling movement in a processing area of the workpiece. The tool movement can have a rolling and a sliding movement component.

The tool can therefore intervene periodically (due to the orbital movement) in the workpiece for a certain period of time, and within this period of time in which the tool (more precisely: the effective area of the tool) is in contact with the workpiece, the tool rotates the axis of rotation of the tool holder, so that (during the specified period of time) a movement of the tool (tool movement) takes place on the workpiece. During a forming operation, different points in the effective area come into contact with different points in the processing area. This is in contrast, for example, to hammering processing, such as those mentioned WO 2005/075125 A1 and WO 2007/009267 A1 are known, where there is virtually only a momentary contact between the tool and the workpiece, and where the entire effective range of the tool comes into contact with the workpiece at the same time when the tool intervenes in the workpiece.

As a result, a high surface quality can be achieved since the workpiece can be machined along a large part of the axial profile extension to be created during a single intervention. In particular, the workpiece can be processed essentially along the entire extent of the workpiece during a single intervention axial profiling to be generated takes place. Accordingly, post-processing, as in the case of the method according to WO 2007/009267 A1 This may be necessary if the surface quality requirements are particularly high and can be avoided because the processing does not consist of a large number of axially shifted individual processing steps along the axial profile extension, which only overlap one another to a small extent. Higher productivity can also be achieved due to the significantly lower number of tool interventions to be carried out.

And the rotational movement around its own axis together with the aforementioned synchronization can cause the tool to be brought into engagement with the workpiece in a desired or predetermined azimuthal orientation, for example always in the same azimuthal orientation or, more precisely: always in the same azimuthal region. Due to the aforementioned rotational movement, a change in the azimuthal orientation of the tool takes place during each intervention (mediated by the tool holder); The azimuthal alignment changes over the duration of the intervention, for example in the same way with every intervention of the tool.

For example, the rotational movement of the tool holder can be synchronized with the rotating movement of the tool holder such that the tool passes through the same azimuthal orientations during each of the forming interventions.

In this text, unless otherwise stated, the terms azimuth and azimuthal refer to the axis of rotation of the tool holder.

The synchronization enables sensible use of a tool that has a non-rotationally symmetrical shape (with respect to the specified axis of rotation when the tool is held in the tool holder). In particular, a tool can be used that has an effective range that only extends over an azimuthal sector. The tool can therefore be a sectoral tool. This, for example in contrast to those mentioned WO 2005/075125 A1 known rotationally symmetrical tools.

For example, the tool can end after the effective range or be set back from the effective range in the radial direction (with respect to the axis of rotation mentioned). This means that there can be a free area that extends over an azimuthal area adjoining the effective area.

Such a sectoral tool can be suitable for producing profiling up close to a workpiece projection. This is in contrast to the one mentioned WO 2005/075125 A1 known rotationally symmetrical tools in which the effective range extends over the entire circumference, and which also do not carry out a defined, let alone synchronized, rotary movement. The tool presented here can have an effective area that has a non-rotationally symmetrical shape (with respect to the axis of rotation).

Due to the tool holder's own rotation about its axis of rotation, after the intervention has taken place, a free area adjoining the effective area can be faced towards the workpiece, in which a workpiece projection, for example a workpiece shoulder, can be accommodated, so that reshaping of the workpiece projection by the sectoral tool can be avoided .

With each intervention, the tool can therefore reshape the workpiece as described in an at least partially rolling manner until an (azimuthal) end of the effective range is reached, and then continue to rotate around the axis of rotation in order to accommodate the workpiece projection in the said free area (without the workpiece projection coming into contact with the tool).

The rotational movement can take place, for example, throughout the entire rotation or continuously. This makes it possible to achieve good synchronization of the rotary movement of the tool holder with the rotational movement of the tool holder.

For example, the synchronization of the two movements can be implemented mechanically. A mechanical synchronization device can therefore be provided for this synchronization. However, the movements mentioned can also be synchronized with one another in another way, for example electronically, i.e. using an electronic synchronization device.

In some exemplary embodiments, the synchronization device mentioned, also referred to below as the second synchronization device, has a planetary gear. For example, it can have a ring gear and a planetary gear running in the ring gear, whereby the planetary gear can represent part of the tool holder or is at least firmly connected to the tool holder or rotates with the rotational movement of the tool holder about the axis of rotation and also takes part in the said orbital movement . The axis of the planet gear can be coaxial with the axis of rotation.

On the other hand, the planetary gear can also drive the tool holder to rotate about its axis of rotation. The drive device already mentioned above for generating the rotational movement of the tool holder about its axis of rotation of the tool holder can therefore have a planetary gear.

A planetary gear can therefore be provided which simultaneously generates the rotational movement of the tool holder about its axis of rotation and synchronizes this rotational movement with the rotating movement of the tool holder.

The mentioned, for example planetary orbital movement can be conveyed to the tool holder by a revolving body. The tool holder can be mounted in the circulating body, in particular rotatably mounted about its axis of rotation. The rotating body can, for example, perform a rotation about a rotating body axis, and the axis of rotation of the tool holder is spaced from the rotating body axis, so that the rotating axis carries out a rotating movement essentially along a circular path.

If the mentioned planetary gear is provided, this rotating movement can generate the rotational movement of the workpiece holder, mediated by the planetary gear. For this purpose, the circulating body axis can be aligned coaxially with an axis of the ring gear. Accordingly, the drive device already mentioned above can have the circulating body and a planetary gear for generating the rotational movement of the tool holder about its axis of rotation. Likewise, a drive shaft for driving the rotating body to rotate about its rotating body axis can belong to the drive device mentioned.

A drive shaft for driving the rotating body to rotate about its rotating body axis may, in addition to the rotating body, also belong to a drive device for generating a movement of the rotating body.

Furthermore, a radial infeed of the tool or the tool holder - perpendicular to a longitudinal axis of the workpiece or a workpiece holder holding the workpiece - can be provided, so that an ever deeper engagement of the tool into the workpiece is made possible during the course of machining. The tool can be advanced radially until a desired profile depth is reached.

For example, the radial feed can be realized in that the circulating body or in particular a circulating body axis of the circulating body is moved towards the longitudinal axis, i.e. in this sense experiences a radial feed.

For example, the revolving body can be mounted in a profiling head, in particular in the profiling head it can be rotatably mounted about its revolving body axis, and the profiling head can be driven to move towards the longitudinal axis. Accordingly, the circulating body can be moved towards the longitudinal axis by means of a drive for the radial feed while it rotates about its circulating body axis. And the circulating body axis can be moved accordingly towards the longitudinal axis.

As a result, the described complex movement of the tool can have a further component, namely the described movement running radially to the longitudinal axis (infeed movement). The axis of rotation of the tool holder can be adjusted accordingly perform a movement that results from a circular movement that is superimposed on a linear movement of the center of the circle, in particular, wherein the linear movement takes place in a plane that is defined by the circular movement.

Furthermore, a rotational movement of the workpiece or the workpiece holder around the longitudinal axis can be provided, for example generated by means of a corresponding drive device, for example by means of a torque motor, so that the workpiece can be machined by means of the tool at different positions distributed over the circumference of the workpiece. In this way, different profile gaps in the profiling to be created can be created using the tool. As will be explained below, multiple tools may be provided, so that not necessarily a single tool (or each of the tools) contributes to the formation of all profile gaps of the profiling. Nevertheless, it can be provided that the tool engages with the workpiece at any position along the circumference of the workpiece at which a test gap in the profiling is to be created, and thus contributes to the formation of all profile gaps in the profiling.

The said rotational movement can have a varying rotational speed, in particular a rotational speed that varies periodically at least in sections. The rotation movement mentioned can be, for example, an intermittent rotation.

It can be provided that the rotational speed of the rotational movement of the workpiece or the workpiece holder has successive phases of relatively higher rotational speed and relatively lower rotational speed. The processing of the workpiece by the tool can take place in particular during phases of relatively lower rotation speed. The slower the workpiece rotates during the engagement of the tool or the longer the workpiece rotates slowly or stands still in the phases of relatively lower rotation speed, the better a high precision of the profiling ultimately produced can be achieved.

For example, it can be provided that the tool processes the workpiece in phases of the rotational movement in which the workpiece is stationary. For example, it can be provided that the tool processes the workpiece in phases of rotational standstill of an intermittent rotation of the workpiece (rotation standstill has a rotation speed of zero).

A synchronization of the rotational movement of the workpiece holder with the rotating movement of the tool holder can be provided. This can ensure that the machining of the workpiece always takes place at the same positions along the circumference of the workpiece.

For example, a synchronization device, also referred to below as a first synchronization device, can be an electronic synchronization device.

In the exemplary embodiment described above with planetary gear and revolving body, the first synchronization device can, for example, synchronize the drive for the rotation of the workpiece or workpiece holder with the drive shaft for driving the revolving body to rotate about its revolving body axis.

The method can in particular be a method for producing a profile body provided with a profiling by cold forming a workpiece, wherein the workpiece can have a longitudinal axis and, in a processing area, an outer surface into which the profiling is to be introduced. The outer surface can be extended along the longitudinal axis. In particular, the outer surface can be concentric to the longitudinal axis, for example conical or cylindrical. However, other shapes of the outer surface, for example polygonal ones, for example in prismatic processing areas, are also possible.

The workpiece performs a rotational movement around the longitudinal axis. And the workpiece, in particular the outer surface mentioned, is processed by a tool in a large number of successively carried out forming interventions, in each of which an effective area of the tool comes into contact with the machining area. The corresponding tool movement is already described above.

The tool is held by a tool holder, and the tool holder is rotatably mounted in a rotating body about an axis of rotation of the tool holder and is driven to rotate about its axis of rotation. And the tool holder is driven to a rotating movement by the rotating body; In particular, the tool holder is driven by the circulating body to move along an orbit.

• dass die Rotationsbewegung des Werkstücks mit der umlaufenden Bewegung des Werkzeughalters synchronisiert ist; und
• dass die Drehbewegung des Werkzeughalters mit der umlaufenden Bewegung des Werkzeughalters synchronisiert ist.

It is further provided that

• that the rotational movement of the workpiece is synchronized with the rotating movement of the tool holder; and
• that the rotational movement of the tool holder is synchronized with the rotating movement of the tool holder.

In particular, it can be provided that the rotational movement of the workpiece is synchronized with the rotating movement of the tool holder in such a way that several of the forming interventions take place at different positions distributed over a circumference of the workpiece. If an external profile is created, the positions mentioned can be positions at which profile gaps in the profiling are to be created. If the method produces an internal profiling of the workpiece, the positions can be positions that lie between adjacent profile gaps of the internal profiling to be created.

And in particular it can also be provided that the rotational movement of the tool holder is synchronized with the rotating movement of the tool holder in such a way that the tool passes through the same azimuthal orientations during each of the forming interventions.

If the rotational movement of the tool holder is synchronized with the rotating movement of the tool holder such that azimuthal orientations that Tool passes through during the respective forming intervention, is identical in each of the forming interventions, a profiling can be created, for example, which comes close to a profiling limiting structure, for example a workpiece projection.

The method can also be viewed as a method for profiling a workpiece and/or as a method for producing a profiling in a workpiece.

The workpiece can be a hollow part, in particular a rotationally symmetrical, for example cylindrical, hollow part.

The workpiece can be a solid part, in particular a rotationally symmetrical, for example cylindrical, solid part.

The workpiece can be a metal workpiece.

The processing area can be an area into which the profiling is to be introduced, i.e. an area to be profiled. The processing area can be an axially delimited section of the workpiece, for example an end piece of a tubular or rod-shaped workpiece.

The workpiece can have a second area adjoining the processing area. This second area can, adjacent to the processing area, have a profiling delimitation structure, for example a workpiece projection, which has a radial extent at least in an (azimuthal) angular area around the longitudinal axis that is larger than a radial extent of the outer surface in the processing area where this adjacent to the workpiece projection. The profiling limiting structure can be a profiling obstacle, for example a workpiece shoulder.

A profiling boundary structure can form an end or a boundary of the profiling.

The outer surface in the processing area can, for example, be rotationally symmetrical, for example cylindrical or conical. However, the outer surface can also be designed differently, for example polygonal.

The profiling can be an external profiling. This can be created in a hollow part or in a solid part. With hollow parts, for example, it is also possible for an external and an internal profiling to be created at the same time, for example if it is intended that the workpiece sits on an externally profiled mandrel in its processing area. Furthermore, it is also possible for an internal toothing to be created in a hollow part without external toothing also being created at the same time. Provision can also be made for the workpiece to sit on an externally profiled mandrel in its processing area.

The profiling can have a large number of profile gaps (recesses in the workpiece in the processing area), which are distributed over the circumference, in particular, for example, evenly distributed over the circumference. However, the profile gaps can also be unevenly distributed over the circumference.

The rotating movement of the tool holder can be a continuous movement and can in particular take place at a constant speed.

The rotational movement of the tool holder can be a continuous movement and can in particular take place at a constant rotation speed.

In particular, these two speeds can have a time-constant relationship to one another.

The orbital movement can be a circular movement.

A trajectory (movement path) that describes the movement of the tool holder can result from a superposition of the rotating movement with a (radial) movement perpendicular to the longitudinal axis.

In some embodiments, the orbiting body performs rotation about a orbiting body axis. This allows the rotating movement of the tool holder to be generated. The rotating movement of the tool holder can take place in a plane perpendicular to the rotating body axis.

The rotating body axis and the axis of rotation can be aligned parallel to one another.

The rotating movement of the tool holder can take place in a plane to which the longitudinal axis is aligned parallel.

The rotation of the circulating body can be a continuous movement and in particular have a constant rotation speed. And the rotational movement of the tool holder can be a continuous movement and in particular have a constant rotation speed. And these two rotation speeds can have a time-constant relationship to one another. A synchronization of these two rotation speeds can be achieved, for example, by means of a planetary gear, as already described above.

The planetary gear can have a ring gear and a planetary gear running in the ring gear. The planet gear can be part of the tool holder. And it can carry out the rotational movement together with this. The position of the planet gear can be fixed relative to the position of the tool held on the tool holder. The ring gear can be fixed in a profiling head in which the circulating body is mounted, in particular rotatably mounted.

• der Umlaufkörper gelagert sein, insbesondere drehbar gelagert sein;
• ein Antrieb für die Rotation des Umlaufkörper gelagert sein; und
• ein Hohlrad fixiert sein, sofern vorhanden.

The profiling head can be a bearing housing for receiving or storing parts of the device. For example, in the profiling header

• the circulating body be mounted, in particular rotatably mounted;
• a drive for the rotation of the circulating body can be mounted; and
• a ring gear must be fixed, if available.

Furthermore, the profiling head can be operatively connected to a drive, for example a linear drive, for the radial feed.

Two profiling heads can also be provided, each with at least one tool, for example with a first tool in a first profiling head and a second tool in a second profiling head. These can be arranged opposite one another with respect to the longitudinal axis, for example in mirror image relation to a plane containing the longitudinal axis.

The two profiling heads, in particular including the device parts provided in them such as the circulating body and ring gear, can be designed the same or manufactured according to the same specifications, with the movements of the device parts running in mirror image with respect to a plane containing the longitudinal axis.

The respective rotating movements of the two tools mentioned can be different from one another, namely, in particular, run in mirror images of one another to a plane containing the longitudinal axis. The respective rotating movements of the two tools mentioned can take place in one and the same plane.

The rotating movement of the first tool (the first profiling head) can be synchronized with the rotating movement of the second tool (the second profiling head) so that the forming interventions of the two tools mentioned take place simultaneously.

Due to the (mirror) symmetrical structure, mechanical stress on the workpiece holder can be kept low because the respective forces directed towards the longitudinal axis essentially cancel each other out.

Multiple tools can also be provided for other reasons and at other locations, for example within the same profiling head.

On the one hand, a single tool holder can hold two or more tools, for example in such a way that their effective areas are evenly distributed azimuthally with respect to the axis of rotation of the tool holder.

For example, these tools can intervene in the workpiece to form it alternately during successive cycles.

This can result in an increased service life of the individual tools. On the other hand, two or more tool holders can be provided, each holding (at least) one tool. The rotating movements of these tool holders can, for example, describe the same orbit; and they can be evenly distributed along the orbit. For example, these tool holders can be evenly distributed azimuthally with respect to the rotating body axis. For example, one intervention into the workpiece can take place per tool holder per rotation of the rotating body.

This means that (with the same number of rotations of the rotating body) the number of interventions per time can be multiplied and the workpiece can be processed more quickly. During a period of rotation of the rotating body, N forming interventions can take place, where N indicates the number of tool holders, each with (at least) one tool.

If N indicates the number of tool holders with n tools each and two embossing heads with the same (or mirror image) structure are provided, the workpiece can be machined with 2-N-n tools.

The tools or at least their effective areas can, for example, be manufactured according to the same specifications.

The tool can be a rolling die.

The tool can have a setback (azimuthally) following the effective area, for example an inwardly directed shoulder. A free person can there

Start in the area that, for example, leaves room for a workpiece projection after the intervention has been carried out, so that it is not reshaped by the tool.

In the free area, the tool held by the tool holder can be set back radially relative to the effective area.

In a section perpendicular to the salmon axis through the effective area during an intervention, the tool can have a shape that corresponds to the negative of the shape of a profile gap of the generating profiling. This can be provided in particular if the profiling includes or is an external profiling. At the same time as the external profiling, an internal profiling can optionally be created - or not.

The effective range can be defined by the fact that it is the area of the tool in which the tool comes into (direct) contact with the workpiece.

When the tool is supported by the tool holder, the tool and the tool holder can have a constant relative position to each other. The tool can rotate with the associated tool holder. And if a planetary gear is provided that is part of the tool holder, then the relative position of the tool to the planetary gear can also be constant.

The tool can be part of a tool insert that can be fixed to the tool holder.

• einen um seine Längsachse rotierbaren Werkstückhalter zur Halterung des Werkstücks;
• eine Antriebsvorrichtung zum Erzeugen einer Rotationsbewegung des Werkstückhalters um die Längsachse, insbesondere wobei die Rotationsbewegung intermittierend ist bzw. alternierend Zeitdauern des Stillstandes und Zeitdauern der Rotationsbewegung aufweist;
• einen Umlaufkörper;
• einen Werkzeughalter zum Haltern eines Werkzeuges, insbesondere wobei der Werkzeughalter in dem Umlaufkörper um eine Drehachse des Werkzeughalters drehbar gelagert ist;
• eine Antriebsvorrichtung zum Erzeugen einer Drehbewegung des Werkzeughalters um seine Drehachse; und
• eine Antriebsvorrichtung zum Erzeugen einer Bewegung des Umlaufkörpers, durch die der Werkzeughalter zu einer umlaufenden Bewegung antreibbar ist, insbesondere entlang einer Umlaufbahn.

The device is a device for producing a profile body provided with a profiling by cold forming a workpiece. For this purpose, the device has:

• a workpiece holder that can be rotated about its longitudinal axis to hold the workpiece;
• a drive device for generating a rotational movement of the workpiece holder about the longitudinal axis, in particular wherein the Rotational movement is intermittent or has alternating periods of standstill and periods of rotational movement;
• a circulating body;
• a tool holder for holding a tool, in particular wherein the tool holder is rotatably mounted in the circulating body about an axis of rotation of the tool holder;
• a drive device for generating a rotational movement of the tool holder about its axis of rotation; and
• a drive device for generating a movement of the rotating body, through which the tool holder can be driven to a rotating movement, in particular along an orbit.

• eine erste Synchronisationsvorrichtung zur Synchronisation der Rotationsbewegung des Werkstückhalters mit der umlaufenden Bewegung des Werkzeughalters; und
• eine zweite Synchronisationsvorrichtung, zur Synchronisation der Drehbewegung des Werkzeughalters mit der umlaufenden Bewegung des Werkzeughalters.

The device also has:

• a first synchronization device for synchronizing the rotational movement of the workpiece holder with the rotating movement of the tool holder; and
• a second synchronization device for synchronizing the rotational movement of the tool holder with the rotating movement of the tool holder.

The drive device for generating a rotational movement of the tool holder about its axis of rotation can be at least partially identical to the second synchronization device. For example, the planetary gear already described can, on the one hand, be part of this drive device by converting the movement of the rotating body into the rotational movement of the tool holder, and on the other hand it can be part of the first synchronization device (or correspond to the first synchronization device) by converting the rotational movement of the tool holder the rotating movement of the tool holder.

The drive device for generating a movement of the rotating body can, for example, have a drive spindle. This can also be part of the drive device for generating a rotational movement of the tool holder about its axis of rotation, for example mediated by the planetary gear.

The circulating body can be mounted in a profiling head, in particular rotatably mounted. And this can be driven towards the longitudinal axis by means of a drive for the radial feed movement. The drive can, for example, be a drive for a movement of the profiling head that runs perpendicular to the longitudinal axis.

The first synchronization device and the second synchronization device can be one and the same synchronization device or can be completely or partially different from one another.

The first synchronization device can be set up to ensure that a rotational frequency of the rotating movement of the first tool holder has a fixed (time-unchanged) relationship with a speed of the rotational movement of the workpiece.

The second synchronization device can be set up to ensure that a rotational frequency of the rotating movement of the tool holder has a fixed (time-unchanged) relationship with a speed of rotation of the tool holder.

The device can be set up so that the cold forming of the workpiece can take place through a large number of forming interventions carried out one after the other. These can be interventions by the same tool or interventions by several tools.

And the first synchronization device can be set up to synchronize the rotational movement of the workpiece holder with the rotating movement of the tool holder in such a way that several of the forming interventions take place at different positions distributed over a circumference of the workpiece.

The device can be set up so that in each of the forming interventions an effective area of a tool (for example one and the same tool or several tools) comes into contact with the processing area. The tool (more precisely: the effective area) can roll on the outer surface (in the processing area). During each of the forming interventions, different points of the effective area can come into contact with different points of the processing area one after the other during the duration of the intervention.

And the second synchronization device can be set up to synchronize the rotational movement of the tool holder with the rotating movement of the tool holder such that the tool passes through the same azimuthal orientations in each of the forming interventions of the tool.

If several tools and one or more tool holders (each holding at least one of the tools) are provided, it can be provided that the second synchronization device is set up to synchronize the rotary movement of the at least one tool holder with the rotating movement of the respective tool holder in such a way that each of the Tools undergo the same azimuthal orientations in each of the forming interventions of the corresponding tool.

For example, if the profiling to be generated has r profile gaps and the device has N tool holders whose rotating movement describes one and the same orbit, the first synchronization device can, for example, be set up so that an Nth of a period of the rotating movement is equal to an integer multiple is one rth of the period of the rotational movement of the workpiece. This means that the interventions take place exactly at the positions along the circumference of the workpiece where profile gaps need to be created. In particular, the first synchronization device can, for example, be set up in such a way that an Nth of a period of the rotating movement is equal to an rth of the period of the rotational movement of the workpiece. As a result, the interventions take place at adjacent profile gap positions.

Further embodiments and advantages emerge from the dependent claims and the figures.

Fig. 1

eine Vorrichtung zur Durchführung des Verfahrens zur kaltumformenden Profilierung eines Werkstücks;

Figs. 2A-2D

aufeinanderfolgende Phasen des Verfahrens;

Fig. 3

einen Werkzeughalter mit Werkzeug, in einem Schnitt durch seine Drehachse;

Fig. 4

ein Detail eines Planetengetriebes mit einem Planetenrad gemäss Fig. 3;

Fig. 5

ein Detail einer Vorrichtung mit zwei Profilierungsköpfen, mit symbolisierter radialer Zustellung;

Fig. 6A

eine Umlaufbahn eines Werkzeughalters;

Fig. 6B

eine radiale Zustellungsbewegung, symbolisch;

Fig. 6C

eine Trajektorie eines Werkzeughalters, als Überlagerung von umlaufender Bewegung und radialer Zustellung;

Fig. 7

ein Detail einer Vorrichtung mit zwei Profilierungsköpfen, die jeweils drei Werkzeughalter mit je zwei Werkzeugen aufweisen;

Fig. 8

einen Profilkörper mit nach aussen abstehender Schulter;

Fig. 9

ein Detail eines Werkstücks auf einem aussenprofilierten Dorn, in einem Schnitt senkrecht zur Längsachse;

Fig. 10

ein Werkstück mit einem konischen Bearbeitungsbereich, in einem die Längsachse enthaltenden Schnitt

Fig. 11

ein Werkstück mit einer polygonalen Aussenfläche, in einem Schnitt senkrecht zur Längsachse;

Fig, 12

ein Werkstück bzw. einen Profilkörper mit zwei axial beabstandeten radial nach aussen gerichteten Profilierungsbegrenzungsstrukturen, zwischen denen eine Profilierung erzeugt wurde;

Fig. 13

ein Werkstück bzw. einen Profilkörper mit zwei axial beabstandeten radial nach innen bzw. nach aussen gerichteten Profilierungsbegrenzungsstrukturen, zwischen denen eine Profilierung erzeugt wurde;

Fig. 14

ein Werkstück bzw. einen Profilkörper ohne Profilierungsbegrenzungsstrukturen;

Fig. 15

ein Werkstück mit nicht-rotationssymmetrischen Profilierungsbegrenzungsstruktur, in einem Schnitt senkrecht zur Längsachse;

Fig. 16

ein Werkstück bzw. ein Profilkörper mit azimuthal ungleichmässig verteilten Profillücken, in einem Schnitt senkrecht zur Längsachse.

The subject matter of the invention is explained in more detail below using exemplary embodiments and the accompanying drawings. It shows schematically:

Fig. 1

a device for carrying out the method for cold-forming profiling of a workpiece;

Figs. 2A-2D

successive stages of the procedure;

Fig. 3

a tool holder with tool, in a section through its axis of rotation;

Fig. 4

a detail of a planetary gear with a planet wheel according to Fig. 3 ;

Fig. 5

a detail of a device with two profiling heads, with symbolized radial infeed;

Fig. 6A

an orbit of a tool holder;

Fig. 6B

a radial delivery movement, symbolic;

Fig. 6C

a trajectory of a tool holder, as a superposition of rotating movement and radial infeed;

Fig. 7

a detail of a device with two profiling heads, each of which has three tool holders with two tools each;

Fig. 8

a profile body with a shoulder protruding outwards;

Fig. 9

a detail of a workpiece on an externally profiled mandrel, in a section perpendicular to the longitudinal axis;

Fig. 10

a workpiece with a conical machining area, in a section containing the longitudinal axis

Fig. 11

a workpiece with a polygonal outer surface, in a section perpendicular to the longitudinal axis;

Fig, 12

a workpiece or a profile body with two axially spaced, radially outwardly directed profiling limiting structures, between which a profiling was created;

Fig. 13

a workpiece or a profile body with two axially spaced profiling limiting structures directed radially inwards or outwards, between which a profiling was created;

Fig. 14

a workpiece or a profile body without profiling limiting structures;

Fig. 15

a workpiece with a non-rotationally symmetrical profiling limiting structure, in a section perpendicular to the longitudinal axis;

Fig. 16

a workpiece or a profile body with azimuthally unevenly distributed profile gaps, in a section perpendicular to the longitudinal axis.

Some parts that are not essential for understanding the invention are not shown. The exemplary embodiments described are examples of the subject matter of the invention or serve to explain it and have no restrictive effect.

Fig. 1 shows a device 100 for carrying out the method for cold-forming profiling of a workpiece 1. The workpiece 1 is held in a workpiece holder 10, which is in Fig. 1 is shown symbolically and has a longitudinal axis Z, which is also a longitudinal axis of the workpiece 1.

In the example shown, the workpiece 1 has a processing area 11 which is rotationally symmetrical with respect to the longitudinal axis Z and has an outer surface 11a, which is, for example, cylindrical and in which a profiling is to be introduced, and which is adjoined by a second area 12 in which the workpiece 1 has a has a larger diameter than in the processing area 11. As a result, a profiling limiting structure designed as a workpiece shoulder 13 is formed between the areas 11 and 12.

Next is an in Fig. 1 Symbolically represented circulating body 8 is provided, which carries out a movement R8 ', namely by moving by one in in the example shown Fig. 1 Circulating body axis, not shown, rotates and thus carries out a rotation R8 '. A tool holder 5 is mounted in the circulating body 8 and, due to the movement R8 'of the circulating body 8, carries out a rotating movement R8 along an orbit U.

The tool holder 5 has an axis of rotation W about which it performs a rotational movement R5. This rotary movement R5 can, for example, be generated directly by a drive (rotary drive) or can be derived from the movement R8 'of the rotating body 8, for example mechanically, for example by means of a planetary gear, as will be described in more detail below.

The tool holder 5 holds at least one tool 2, which has an effective area 21 in which it comes into cold-forming contact with the workpiece 1, namely by carrying out a movement during an intervention in the workpiece 1, which will be described in more detail below. whereby this movement can be an at least partially rolling movement and can be composed, for example, of a rolling movement (of the effective area on the processing area) and a sliding movement (of the tool on the workpiece).

Using the tool 2, profile gaps are created in the workpiece 1, with the tool 2 carrying out a large number of interventions per profile gap.

So that the tool 2 can engage in the workpiece 1 at different positions distributed over the circumference of the workpiece 1, the workpiece 1 can be driven to a rotational movement R1 about the longitudinal axis Z by means of the workpiece holder 10, in particular wherein the rotational movement R1 can be an intermittent rotation, so that the tool intervention can take place in a phase when the workpiece 1 is at a standstill.

In Fig. 1 Active connections for the purpose of driving are shown by dashed lines and active connections for the purpose of synchronization (which can be implemented mechanically and/or electronically) are shown by thick dotted lines.

A drive device A1 is provided for generating a rotational movement R1 of the workpiece holder 10, for example a torque motor or another rotary drive, and a drive device A8 for generating the movement R8 'of the rotating body 8. The drive device A8 can, for example, have a drive shaft.

And there is also a drive device A5 for generating the rotational movement R5 of the tool holder 5 about its axis of rotation W, as already stated above.

The axis of rotation W is aligned parallel to the rotating body axis. The rotating movement R8 of the tool holder takes place in a plane on which these axes are vertical. The longitudinal axis is aligned parallel to this plane.

So that tool interventions take place where profile gaps are to be created, the workpiece rotation R1 and the rotating movement R8 are synchronized with one another by means of a first synchronization device S1, for example by the workpiece rotation R1 and the movement R8 'of the rotating body 8 being synchronized with one another by means of the first synchronization device S1 are.

For example, the synchronization can consist of the two movements (R1 and R8 or R8') having a constant ratio of their rotation times. For example, if only one tool 2 is provided and successive interventions of the tool 2 in the workpiece 1 each in adjacent profile gaps should take place, T8/T1 = z can be selected, with a rotation time (period) T8 of the rotating movement R8 of the tool holder 5 and a rotation time (period) T1 of the workpiece, where z is the number of profile gaps to be generated.

This synchronization can be implemented, for example, by means of an electronic synchronization device S1. Other synchronization devices, for example mechanical ones, are also fundamentally conceivable.

Furthermore, a second synchronization device S5 is provided, by means of which the rotary movement R5 of the tool holder 5 and the rotating movement R8 of the tool holder 5 are synchronized with one another. This can be realized, for example, by means of an electronic synchronization device, which can then also be identical to the first synchronization device S1. In the example shown, this synchronization is implemented mechanically, namely by means of the already mentioned planetary gear.

In this respect, the drive device A5 can be at least partially identical to the second synchronization device S5, namely in that the planetary gear, on the one hand, generates the rotary movement R5 and, on the other hand, effects the synchronization between the rotary movement R5 and the rotating movement R8.

The synchronization achieved by means of the second synchronization device S5 can cause the tool 2 to assume the same azimuthal orientations (based on the axis of rotation W of the tool holder 5) during each of its interventions in the workpiece 1. This can be advantageous, for example, if the workpiece 1, as in Fig. 1 shown has an outwardly projecting workpiece shoulder 13 and the profiling should be created close to this. This will be in Figs. 2A to 2D explained.

• eine senkrecht zur Drehachse W ausgerichtete Achse (in Figs. 2A-2D gestrichelt dargestellt), die durch die Mitte des Wirkbereichs 21 und durch die Drehachse W verläuft; und
• eine senkrecht zur Drehachse W ausgerichtete Achse (in Figs. 2A-2D gepunktet dargestellt), die durch die Mitte des Wirkbereichs 21 und durch die Umlaufkörperachse verläuft.

Figs. 2A-2D illustrate successive phases of the process. Most of the reference numbers are already explained above; 23 denotes a tool recess or a tool shoulder, 22 denotes a free area of the tool 2, and ϕ denotes an azimuthal orientation of the tool, based on the axis of rotation W, or, more precisely, the corresponding azimuthal angle (measured counterclockwise). As reference axes for the azimuthal orientation, for example, as in Figs. 2A-2D (and also in Fig. 4 , see below) can be selected:

• an axis aligned perpendicular to the axis of rotation W (in Figs. 2A-2D shown in dashed lines), which runs through the center of the effective area 21 and through the axis of rotation W; and
• an axis aligned perpendicular to the axis of rotation W (in Figs. 2A-2D shown in dotted lines), which runs through the center of the effective area 21 and through the circulating body axis.

Fig. 2A illustrates the situation at approximately the beginning of an intervention, where the tool 2 just comes into contact with the workpiece 1. The azimuthal angle φ in the illustrated example is approximately 317°, corresponding to -43°.

Fig. 2B illustrates the situation about halfway through the procedure. The azimuthal angle ϕ is a few degrees in the illustrated example.

Fig. 2C illustrates the situation at approximately the end of an intervention, where the tool 2 is still in contact with the workpiece 1. The azimuthal angle ϕ is approximately 40° in the illustrated example.

Fig. 2D illustrates the situation shortly after the end of an intervention, where the tool 2 is no longer in contact with the workpiece 1. The azimuthal angle ϕ in the illustrated example is a good 70°.

By means of the second synchronization device S5, for example, it can be ensured that during each revolution the tool 2 passes through the azimuthal angular range, here for example from -43° to a good 70°, during the engagement with the workpiece 1.

This can prevent the tool 2 from coming into (forming) contact with the workpiece shoulder 13 - and the profile can still be formed close to the workpiece shoulder 13.

For this purpose the tool 2 is a sectoral tool. Adjoining the effective area, it has the free area 22, in which it is set back radially (with respect to the axis of rotation W).

As can be seen from Fig. 2A can easily be seen, the workpiece 1 could have a further workpiece projection at the end shown on the right, instead of stopping there (in Fig. 2A indicated by dots). In such a case, it is possible by means of the method described to produce the profiling between the two workpiece projections in such a way that it extends close to the respective workpiece projection.

Fig. 3 shows a tool holder 5 with tool 2, in a section through its axis of rotation W. It has (optionally) two planet gears 45, the axes of which are coaxial with the axis of rotation W, and two storage areas 2L for rotatable storage in the rotating body 8 (see Fig. 1 ). The tool holder 5 can be formed in one piece. The tool 2 forms part of a tool insert 2e, which is fixedly connected to the tool holder 5, for example screwed to it.

The tool 2 can be attached to the tool holder 5 so that it cannot rotate relative to the planet gears 45.

Fig. 4 illustrated in a view of a section perpendicular to the axis of rotation in detail of a planetary gear 40 of the device, for example having planet gears 45, as in the tool holder 5 according to Fig. 3 are integrated, of which in Fig. 4 but only one is visible.

The planetary gear 40 has a ring gear 41 with an axis 42 and can also have a second one in addition to this Fig. 4 Have a ring gear, not shown, in which the second planetary gear of the tool holder 5 runs.

The axis 46 of the planet gear 45 is coaxial with the axis of rotation W. And the rotating body axis V (corresponding to the axis of rotating movement of the tool carrier) is coaxial with the axis 42 of the ring gear 41.

By appropriately dimensioning the planetary gear 40, it can be ensured, for example, that the tool 2 is at a specific position along the orbit U (see Fig. 1 ) of the tool carrier 5, for example where the engagement in the workpiece 1 is to be completed, has the same azimuthal orientation with each revolution.

Instead of a planetary gear with two ring gears and two planetary gears, the planetary gear can, for example, also be implemented with no more than one ring gear and no more than one planetary gear.

The mechanical requirements for the workpiece holder 10 can be greatly reduced if two tool interventions take place with each tool intervention, namely at locations of the workpiece 1 that are opposite one another with respect to the longitudinal axis, and in particular also axially (relative to the longitudinal axis Z) at the same position.

Fig. 5 illustrates a detail of a device 100 with two profiling heads 3a, 3b, with a radial infeed also symbolized. The circulating bodies (including at least one tool carrier each) and, if provided, the planetary gears can be stored in the profiling heads 3a, 3b.

The profiling heads 3a, 3b or the parts mounted in them can be essentially similar, but mirror-inverted in terms of movements.

This in Fig. 5 The workpiece 1 shown symbolically (dashed line) can therefore be machined in mirror image by two tools that are opposite each other with respect to the longitudinal axis Z.

The movements of the two circulating bodies can be synchronized with one another or result from one and the same movement, for example from one and the same rotation drive. And one or more ring gears can be fixed in each of the profiling heads.

During the course of machining, it can be advantageous if the tools can be advanced radially, i.e. in a direction perpendicular to the longitudinal axis Z, since as the number of interventions increases, the profile gaps that are forming become deeper and deeper. This also applies if only a single profiling head is provided or tool intervention only takes place from one side or does not take place using more than a single tool at the same time.

Such a radial feed movement is in Fig. 5 symbolized by the open arrows labeled L2. It can take place along an axis that is perpendicular to the longitudinal axis and parallel to a plane that is described by the rotating movement of the tool holder.

A drive A2 can be provided for radial delivery.

Due to the radial infeed, the trajectory or the movement path of the tool holder results from a superposition of the rotating movement U with the (linear) radial infeed movement, as in Figs. 6A-6C is schematically illustrated.

Fig. 6A symbolizes an orbit U of a tool holder.

Fig. 6B symbolizes a radial infeed movement L2.

Fig. 6C symbolizes a trajectory T of a tool holder, which results from a superposition of rotating movement U and radial infeed L2. In reality, the distances between the approximately circular trajectory components are much smaller than in Fig. 6C presented for clarity.

Fig. 7 illustrates a detail of a device 100 with two profiling heads, each of which has three tool holders 5a1, 5a2, 5a3 or 5b1, 5b2, 5b3, each with two tools 2a1, 2al 'or 2a2, 2a2' etc.

By providing several tool holders 5a1, 5a2,... (possibly per profiling head), several interventions can be carried out per one revolution of a circulating body take place, which can enable faster processing and thus the creation of the profiling within a shorter time.

By providing several tools per tool holder, their service life can be increased, thus enabling longer, uninterrupted profiling. For example, the second synchronization device S5 (see Fig. 1 ) can be set up so that with n tools per tool holder, each of the tools is at a specific position along the orbit U (see Fig. 1 ) of the tool carrier 5 (for example where the engagement in the workpiece 1 is to be completed) has an azimuthal orientation that deviates by 360 ° / n from the azimuthal position at the beginning of its rotation. The deviation can also be a multiple of 360°/n, provided that this multiple is different from 360° and from a multiple of 360°.

Next is in Fig. 7 illustrates that using the method described in this text, profiling can also be created between two profiling limiting structures, for example between the two workpiece shoulders 13, 13 ', whereby the profiling can reach up to the profiling limiting structures.

Fig. 8 shows, in a section perpendicular to the longitudinal axis Z, a profile body 1p, which has a profiling P, which can be generated by means of the method described or by means of the device described. The profiling has a large number of profile gaps pl. Each of these profile gaps pl was created by carrying out a large number of interventions one or more tools 2 one after the other, each of which has an effective area 21, which is shown in the section according to Fig. 8 has a shape that essentially corresponds to the shape of a profile gap pl to be created.

The profile body 1p is a hollow part that sits on an externally profiled mandrel 6 and has a shoulder 13 that projects outwards. By using one Profiled mandrel 6 can be used to create not only an external profiling, but also an internal profiling at the same time.

For solid parts or hollow parts sitting on unprofiled mandrels, an external profiling can be created without an internal profiling being created at the same time.

Furthermore, it is possible to create an internal toothing in a hollow part without an external profiling being created in the hollow part. Fig. 9 illustrates this.

Fig. 9 shows, in a section perpendicular to the longitudinal axis, a detail of a workpiece 1, which sits on an externally profiled mandrel 6 and is about to be processed by means of a tool 2 in the manner described. During the machining, material from the workpiece 1 is then formed into profile gaps 6p. The tool 2 has a flat effective area.

Fig. 10 shows in a section containing the longitudinal axis Z using an example that an outer surface of a processing area 11 of a workpiece 1 does not have to be cylindrical, but can, for example, be conical, as shown.

Fig. 11 shows in a section perpendicular to the longitudinal axis Z using an example that an outer surface 11a of a processing area 11 of a workpiece 1 does not necessarily have to be rotationally symmetrical, but can, for example, be polygonal, as shown. Shown in Fig. 11 is the case that the outer surface 11a has six partial surfaces; However, it can be provided that the outer surface 11a has many more partial areas. In the associated processing area, the workpiece 1 can, for example, be prismatic.

Fig. 12 shows an example of a workpiece 1 or a profile body 1p with two axially spaced profiling limiting structures 13, 13 ', which protrude radially outwards. The profiling P with its profile gaps pl, which is generated using the method described, comes close to this.

Profiling boundary structures may also be directed radially inwardly, relative to the adjacent portion of the processing area. Fig. 13 shows an example of this in which the profiling limiting structures 13 at one end of the processing area 11 are directed radially inwards and the profiling limiting structures 13 'at the other end of the processing area 11 are directed radially outwards.

Fig. 14 illustrates using an example that a processing area 11 does not necessarily have to be limited on one or two sides by profiling limiting structures. A profile body is shown in which both ends of the processing area 11 are not adjacent to profiling limiting structures.

Fig. 15 illustrates using an example that a profiling limiting structure 13 of a workpiece 1 is not necessarily rotationally symmetrical. In the illustrated example, a plurality of radially outwardly projecting workpiece projections are provided, located at various azimuthal positions.

Fig. 16 illustrates, in a section perpendicular to the longitudinal axis L, a workpiece 1 or a profile body 1p, which has a profiling, the profile gaps 1p of which are azimuthally distributed unevenly. Although profile gaps evenly distributed over the circumference are preferred for many applications, there are applications for which an azimuthally irregular arrangement of the profile gaps pl is advantageous.

Of course, a single workpiece can have two or more different processing areas, which can, for example, be axially spaced from one another, and which are each provided with a profiling in the manner described in this text.

Claims (15)

1. A method for manufacturing a profile body (1p) having a profiling (P), by way of cold reshaping a workpiece (1) comprising a longitudinal axis (Z) and, in a machining region (11), an outer surface (11a), wherein the profiling (P) is to be produced in the outer surface (1 1a), wherein the workpiece (1) executes a rotation movement (R1) about the longitudinal axis (Z) and is machined by a first tool (2) in a multitude of reshaping engagements which are carried out successively, wherein in each of the reshaping engagements, an active region (21) of the first tool (2) comes into contact with the machining region (11), wherein the first tool (2) is held by a first tool holder (5; 5a1...), and wherein the first tool holder (5; 5a1,...)

   - is mounted in an orbiting body (8), so as to be rotatable about a rotation axis (W) of the first tool holder (5; 5a1,...); and

   - is driven by the orbiting body (8) to carry out an orbiting movement (R8);

   wherein

   - the rotation movement (R1) of the workpiece (1) is synchronised with the orbiting movement (R8) of the first tool holder (5; 5a1,...);

   characterized in that

   - the first tool holder (5; 5a1,...) is driven to carry out a rotating movement (R5) about the rotation axis (W), wherein the term azimuthal(ly) which is used hereinafter is defined by the rotation axis (W); and

   - the rotating movement (R5) of the first tool holder (5; 5a1,...) is synchronised with the orbiting movement (R8) of the first tool holder (5; 5a1,...).
2. A method according to claim 1, wherein

   - the rotation movement (R1) of the workpiece (1) is synchronised with the orbiting movement (R8) of the first tool holder (5; 5a1,...) in such a way that several of the reshaping engagements take place at each one of various different positions distributed over a periphery of the workpiece (1), and

   - the rotating movement (R5) of the first tool holder (5; 5a1,...) is synchronised with the orbiting movement (R8) of the first tool holder (5; 5a1,...) in such a way that the first tool (2) runs through the same azimuthal orientations (ϕ) in each of the reshaping engagements.
3. A method according to claim 1 or claim 2, wherein the orbiting body (8) carries out a rotation (R8') along an orbiting body axis (V), and wherein the orbiting body axis (V) and the rotation axis (W) are aligned parallel to one another.
4. A method according to claims 1 to 3, wherein the first tool holder (5; 5a1,....) describes a trajectory (T) which results from a superposition of the orbiting movement (U) with a feed movement (L2) which is directed radially towards the longitudinal axis (Z).
5. A method according to one of the claims 1 to 4, wherein the active region (21) of the first tool (2), when the first tool (2) is held by the first tool holder (51; 511,...), extends azimuthally over a sector only.
6. A method according to one of the claims 1 to 5, wherein the workpiece comprises a profiling delimitation structure (13) adjacent the machining region (11), and wherein the active region (21) in each of the reshaping engagements comes into contact with the machining region (1) right up to the profiling delimitation structure (13).
7. A method according to one of the claims 1 to 6, wherein the rotating movement (R5) of the tool holder (5; 5a1,...) is synchronised with the orbiting movement (R8) of the first tool holder (5; 5a1,...) by way of a planetary gear (40).
8. A method according to claim 7, wherein the planetary gear (40) comprises a ring gear (41) and a planet gear (45) running in the ring gear (41), wherein the planet gear (45) is part of the and executes the rotating movement (R5) together with the first tool holder (5; 5a1,...).
9. A method according to one of the claims 1 to 8, wherein the workpiece is simultaneously machined by a second tool (2b) in a multitude of reshaping engagements , wherein in each of the reshaping engagements an active region of the second tool (2b) comes into contact with the machining region (11), in particular wherein each of the successively carried out reshaping engagements of the second tool (2b) takes place at a position of the tool (1) which with respect to the longitudinal axis (Z) lies opposite the position of the workpiece (1), at which simultaneously a reshaping engagement of the first tool (2a) takes place.
10. A method according to one of the claims 1 to 9, wherein the workpiece is additionally machined by a further tool (2a2, 2a1') in a multitude of reshaping engagements which are carried out successively, wherein in each of the reshaping engagements an active region of the further tool (2a2, 2a1') comes into contact with the machining region (11), in particular wherein a tool holder (5, 5a2, ....) holding the further tool (2a1') carries out the same orbiting movement (R8) as the already mentioned tool holder (5; 5a1,...), and wherein this tool holder (5; 5a2) is identical to the already mentioned tool holder (5; 5a1,...) or is different therefrom.
11. A method according to claim 10, wherein the further tool (2a1') is held by the same tool holder (5a1) as the first tool (2; 2a1), in particular wherein the active regions of the two tools (2a1; 2a1') are azimuthally distanced from one another.
12. A method according to claim 10, wherein a second tool holder (5a2) is provided which is different from the first tool holder (5a 1) and by way of which the further tool (2a2) is held, wherein the orbiting movements of the first and the second tool holder describe one and the same orbiting path (Ua).
13. An apparatus (100) for manufacturing a profile body (1p) having a profiling (P), by way of cold reshaping a workpiece (1), wherein the apparatus (100) comprises:

    - a workpiece holder (10) which is rotatable about its longitudinal axis (Z), for holding the workpiece (1);

    - a drive device (A1) for producing a rotation movement (R1) of the workpiece holder (10) about the longitudinal axis (Z);

    - an orbiting body (8);

    - a first tool holder (5; 5a1) for holding a first tool (2; 2a1), wherein the tool holder (5; 5al) is mounted in the orbiting body (8), so as to be rotatable about a rotation axis (W) of the tool holder (5; 5a1);

    - a drive device (A8) for producing a movement of the orbiting body (8) by way of which the first tool holder (5; 5a1) is drivable to carry out an orbiting movement (R8);

    - a first synchronisation device (S1) for synchronising the rotation movement (R1) of the workpiece holder (10) with the orbiting movement (R8) of the first tool holder (5; 5a1);

    characterized in that the apparatus (100) comprises

    - a drive device (A5) for producing a rotating movement (R5) of the first tool holder (5a; 5a1) about its rotation axis (W),

    - a second synchronisation device (S5) for synchronising the rotating movement (R5) of the first tool holder (5; 5a1) with the orbiting movement (R8) of the first tool holder (5; 5a1).
14. An apparatus (100) according to claim 13, comprising a planetary gear (40) which is a constituent of the second synchronisation device (SS) and/or is a constituent of the drive device (A5) for producing a rotating movement (R5) of the first tool holder (5; 5a1) about the rotation axis (W).
15. An apparatus according to claim 13 or claim 14, wherein the orbiting body (8) is mounted in a profiling head (3), and wherein the apparatus (100) comprises a drive (A2) for a movement of the profiling head (3) towards the longitudinal axis (Z).

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