EP3807023A1

EP3807023A1 - Cold rolling machine and method for producing a profile on a workpiece

Info

Publication number: EP3807023A1
Application number: EP19729201.4A
Authority: EP
Inventors: Florian Beutel; Oskar Schmitt; Michael Maier; Alexander Metzger; Rafael Schweda
Original assignee: Osg Ex Cell O GmbH
Current assignee: Osg Ex Cell O GmbH
Priority date: 2018-06-12
Filing date: 2019-05-29
Publication date: 2021-04-21
Anticipated expiration: 2039-05-29
Also published as: CN112351844A; EP3807023B1; DE102018113978B3; BR112020025379A2; ES2911667T3; WO2019238430A1; US11407023B2; US20210245232A1; CN112351844B

Abstract

The invention relates to a cold rolling machine (10) and to a method for producing a profile on a workpiece (14). The cold rolling machine (10) has two preferably identically constructed tool units (12, 13). Each tool unit (12, 13) has at least one rolling rod (19) extending in the longitudinal direction (L), a tool slide (21), a slide drive device (25), a pivoting carrier (33) and a pivot drive (38). The at least one rolling rod (19) is fastened to the tool slide (21) and can be moved in the longitudinal direction (L) by means of the slide drive device (25). The pivoting carrier (33) can be pivoted about a pivot axis (S1, S2) extending in the longitudinal direction (L) by means of the pivot drive (38). The tool slide (21) is arranged on the pivoting carrier (33). An angle of inclination (α) can thereby be set between the two rolling rods (19), which angle of inclination can have, for example, a value of 0 degrees to 2.0 degrees or to 0.2 degrees. Conical profiles can thereby be produced in the workpiece (14).

Description

Cold rolling machine and method for generating a profile on a workpiece

The invention relates to a cold rolling machine such as a method for generating a profile on a workpiece using the cold rolling machine.

A cold rolling machine and a method for generating a profile by means of a cold rolling machine are known for example from EP 1 286 794 B1.

In cold rolling, at least a portion of a workpiece is formed, thereby creating a profile in the workpiece that extends circumferentially around the workpiece. The profile can be a straight toothing, for example. The profile can, for example, be used to produce a rotationally fixed connection between the workpiece, for example a shaft, and another construction part, such as a gearwheel. This non-rotatable connection must be able to withstand the loads that occur during operation. For this reason, the workpiece is usually hardened. However, hardening is only possible after the profile has been created by cold rolling. For some workpieces, this means that the profile he creates during cold rolling does not have the desired dimensions after hardening. In particular, the hardening can result in a conical deformation or a conical distortion of the profile produced.

It can be an object of the present invention are considered to provide a cold rolling machine and a method for producing a profile, by means of which a profile can be produced which, after hardening, corresponds to the dimensional requirements.

This object is achieved by a cold rolling machine with the features of claim 1 and a procedural ren with the features of claim 15.

According to the cold rolling machine has a Ma machine frame and two tool units. Each tool unit is arranged on the machine frame and the two tool units are preferably constructed identically. Each tool unit has at least one rolling rod extending along a longitudinal direction with a rolling rod profile. The rolling rod profiles of the rolling rods of the different tool units face one another. Each roller bar is attached to a tool slide. The tool slide is linearly movable in the longitudinal direction by means of a slide bearing device. A slide drive device is set up to move the tool slide in the longitudinal direction.

[0007] In addition, each tool unit has one

Swivel bracket on. The swivel bracket is mounted on the machine frame so that it can swivel about a swivel axis by means of a swivel bearing device. The swivel axis extends in the longitudinal direction. On the swivel bracket the Schlittenla gereinrichtung is arranged, on which the tool slide is supported th, which in turn carries the roller rod.

[0008] The swivel support can be swiveled about the swivel axis by means of a swivel drive of the tool unit. the. Together with the swivel bracket, the roller rod is swiveled around the swivel axis. By the

Swiveling about the respective swivel axis can be set between the roll bar profiles of the roll bars of the two tool units an inclination angle in a plane perpendicular to the longitudinal direction. If the amount of this angle of inclination is not equal to zero, a profile is generated in the workpiece, which has a taper corresponding to the angle of inclination.

The angle of inclination in the cold rolling machine can be set such that it at least partially compensates for a conical distortion due to the subsequent hardening of the workpiece, so that the workpiece has a conicity after hardening that lies within a predetermined tolerance range. With the invention, a process-related conicity of the profile can thus be compensated for in order to obtain a cylindrical profile. Conicity can result from hardening and / or e.g. if the axial material flow at the profile ends is not symmetrical and / or due to different process forces. With the invention, defined conical profiles can also be generated, regardless of the further processing of the workpiece.

It is advantageous if the cold rolling machine has a control device for controlling the swivel drives of the tool units. The control device can be set up to pivot the pivot carrier by the same pivot angle amount about the respective pivot axis. This creates a symmetrical alignment of the two tool units relative to a reference plane, which is along the longitudinal axis of the workpiece the manufacture of the profile and extends parallel to the longitudinal direction.

It is also advantageous if each pivot drive has a first wedge body with a first inclined surface inclined with respect to a longitudinal direction. The swivel bracket of the respective tool unit can be supported on a support point on this first inclined surface. The support point is arranged radially to the swivel axis from. The first wedge body is movable or displaceable in the longitudinal direction and in particular linearly slidably mounted ver. By moving the first wedge body, the position of the support point changes along the first inclined surface, which causes a pivoting movement of the pivot carrier. By converting or transferring the movement of the wedge body in the longitudinal direction into a pivoting movement, a very precise adjustment of the pivoting angle can be achieved, in particular with small amounts of wedge angle. The wedge angle of the first inclined surface relative to the longitudinal direction is preferably less than 5 degrees or less than 3 degrees. In one embodiment, the wedge angle of the first inclined surface is approximately 2 degrees.

In a preferred embodiment, a swivel bracket can be moved by a swivel angle about the swivel axis, the amount of which is a maximum of 2.0 degrees or a maximum of 1.0 degrees and preferably a maximum of 0.2 degrees.

It is also advantageous if each pivot drive has a second wedge body with a second inclined surface inclined relative to the longitudinal direction. The second wedge body is arranged on the swivel bracket or be fastened. The second inclined surface is on the first Flat surface. As a result, the area load can be reduced.

In a preferred embodiment, the first wedge body is arranged on a rotatably mounted shaft. The shaft can be mounted on the machine frame so as to be linearly movable in the longitudinal direction. For example, the swivel drive can have a screw drive by means of which the shaft can be moved in the longitudinal direction.

[0015] It is also advantageous if the pivot carrier has an L-shaped shape in a plane perpendicular to the longitudinal direction.

Preferably, a bearing body is mounted movably in a vertical direction on the swivel bracket. The height direction is perpendicular to the longitudinal direction and perpendicular to the transverse direction. The tool slide can be movably arranged on the bearing body. The carriage drive device can be mounted in the height direction together with the bearing body movably on the swivel bracket. This creates an assembly comprising the rolling rod, the tool slide and the slide drive device, which is arranged in the height direction on the swivel bracket. The swivel bracket and this assembly are in turn pivoted about the swivel axis.

It is also advantageous if a setting drive is available, which moves the bearing body in the vertical direction relative to the swivel bracket. This allows the height to be adjusted by means of the adjustment drive.

[0018] The adjustment drive can be example have a third wedge body with a third inclined surface inclined to the longitudinal direction. The third wedge body is preferably movably mounted on Schwenkträ ger. The bearing body is supported indirectly or indirectly on the third wedge body or the third inclined surface.

In a exemplary embodiment, a fourth wedge body can be arranged or fastened to the bearing body. The fourth wedge body has a fourth inclined surface inclined with respect to the longitudinal direction. The fourth inclined surface can lie flat against the third inclined surface. By displacing the third and fourth wedge bodies relative to one another, in particular by displacing the third wedge body in the longitudinal direction, the bearing body can be moved in the vertical direction and preferably be displaced linearly relative to the swivel carrier.

In a preferred embodiment of the cold rolling machine, the carriage drive device has a drivable pinion. The pinion can be drive-connected to a slide motor. The pinion meshes with a rack. The rack extends in the longitudinal direction and is angeord net or attached to the tool slide. When the pinion is rotated, the rack moves together with the tool slide in the longitudinal direction.

Any embodiment of the cold rolling machine described above can be used to create a profile on a portion of the workpiece to be profiled. For this purpose, first an angle of inclination between the rolling rod profiles in the plane perpendicular to

Longitudinal direction set. The section of the workpiece to be profiled is then arranged between the rolling rods or the rolling rod profiles. The rolling rods are moved in opposite directions in the longitudinal direction. The roll bar profiles engage in the section to be profiled from the workpiece and reshape it to produce the desired profile. The workpiece rotates around its longitudinal axis and, as it were, rolls on the rolled bar profiles.

Then at least the profiled section of the workpiece can be hardened. A conicity of the profile produced is preferably measured immediately after the profile production and / or after hardening and compared with a tolerance range. Even if the profile must have a defined taper immediately after cold rolling - defined taper can also be a cylindrical profile, i.e. a taper of zero - the profile produced can be measured uncured and compared with a tolerance range. If the determined conicity is within the tolerance range immediately after profile production and / or after hardening, the cold rolling machine or the angle of inclination is set correctly and further workpieces can be produced. If the determined taper is outside the tolerance range, an inclination angle change is determined based on the deviation and the inclination angle is changed by the determined change in inclination angle. As a rule, it is sufficient to determine the taper after the manufacture of a single workpiece and to determine and adjust the required inclination angle therefrom. The others Workpieces of the same type can be manufactured with this setting without the conical delay in hardening leading to increased rejects.

[0024] Advantageous embodiments of the invention result from the dependent claims, the description and the drawings. Preferred exemplary embodiments of the invention are explained in detail below. Show it:

[0025] FIG. 1 shows a schematic representation, similar to a block diagram, of an exemplary embodiment of a cold rolling machine,

Figure 2 shows an embodiment of a cold rolling machine in a perspective view,

FIG. 3 shows the cold rolling machine from FIG. 2 in a sectional view perpendicular to a longitudinal direction,

4 shows the cold rolling machine from FIGS. 2 and 3 in a sectional view at right angles to a transverse direction,

Figure 5 shows the cold rolling machine according to Figures 2-4 in a front view,

Figure 6 is an enlarged view of a

Swivel drive of a tool unit in area VI in Figures 5 and 5

FIG. 7 shows an exemplary embodiment of a method for generating a profile on a workpiece. 1 shows a block diagram of an exemplary embodiment of a cold rolling machine 10. The cold rolling machine 10 has a machine frame 11, indicated only schematically, on which a first tool unit 12 and a second tool unit 13 are arranged. The two tool units 12, 13 are constructed identically in the embodiment and are diametrically opposite with respect to a longitudinal axis A of a workpiece 14 to be profiled. The workpiece 14 has at least one section 15 to be profiled, which in the initial state is circular cylindrical in cross section of the workpiece 14. The section to be profiled can be cylindrical or conical before the profile is introduced. On the circumference of the section 15 to be profiled, a profile is generated by cold forming by means of the cold rolling machine 10.

Each tool unit 12, 13 has a rolling rod

19 with a roll bar profile 20. The roll bar profiles

20 of the two rolling rods 19 face each other. The roller rod 19 of each tool unit 12, 13 is releasably attached to a respective tool slide 21. The work tool slide 21 is movably mounted in a longitudinal direction L on a bearing body 22. On the bearing body 22 here for at least one and, for example, two plain bearing elements 23, each with a plain bearing surface, on which the tool slide 21 is supported.

The longitudinal direction L is oriented at right angles to the plane of the drawing in FIG. 1. A transverse direction Q extends at right angles to the longitudinal direction L, the longitudinal axis A of the workpiece 14 being aligned parallel to the transverse direction Q. At right angles to the longitudinal direction L and to the transverse device Q extends a vertical direction H. In the vertical direction H, the two rolling rods 19 and Walzstangenpro file 20 have a profile distance d, wherein the profile distance d describes, for example, the minimum distance between the two rolling rods 19 in the plane of the longitudinal axis A of the workpiece 14.

In the exemplary embodiment explained here, the bearing body 22 with the slide bearing elements 23 is, for example, a slide bearing device 24 for the tool slide 21. In a modification of this, the slide bearing device 24 could also provide a roller bearing for the tool slide 21 instead of a slide bearing.

By means of a slide drive device 25, the tool slide 21 is movable in the longitudinal direction L relative to the slide bearing device 24 and, for example, relative to the bearing body 22. The carriage drive device

25 has a slide drive motor 26 in the exemplary embodiment, which can be controlled by means of a control device 27. The carriage drive motor 26 is drive-connected to a pinion 28. For example, the pinion 28 can be directly on a drive shaft of the carriage drive motor

26 be arranged in a rotationally fixed manner. The pinion 28 is in engagement with a rack 29. The rack 29 is attached to the tool slide 21 and extends in the longitudinal direction L device. For example, it is net on the opposite side of the roller slide 19 of the tool slide 21. On this side, the tool slide 21 is supported on the slide bearing device 24 and, according to the example, the slide bearing elements 23.

When driving the carriage drive motor 26 the pinion 28 rotates and the rack 29 is moved together with the tool slide 21 in the longitudinal direction L along the slide bearing device 24. The Schlittenla gereinrichtung 24 may have suitable means for guiding the tool slide 21.

Each tool unit 12, 13 also has a swivel bracket 33. In the exemplary embodiment described here, the swivel bracket 33 has an L-shaped shape with a first leg 34 and a second leg 35, which are connected to one another in a corner region. On the first leg 34, the slide bearing device 24 is mounted together with the slide drive device 25 ent long of the first leg 34 movable. The first leg 34 extends from the connection area with the second leg 35 essentially in the height direction H, but can depend on the orientation of the

Swivel bracket 33 also extend slightly inclined to the height direction H, which will be explained below. The second leg 35 extends from the connec tion area with the first leg 34 substantially in the transverse direction Q. In the embodiment illustrated here, the two legs 34, 35 are aligned at right angles to each other.

Between the swivel bracket 33 and the slide bearing device 24, an adjusting drive 36 is arranged in the exemplary embodiment, by means of which the slide bearing device 24 and the slide drive device 25 can be moved linearly along or parallel to the first leg 34 - essentially in the height direction H - are. This allows the profile distance d to be set. The swivel bracket 33 is pivotally mounted on the machine frame 11 by means of a swivel bearing device 37. The pivot bearing device 37 of the first tool unit 12 defines a first pivot axis S1 and

Pivot bearing device 37 of the second tool unit 13 defines a pivot axis S2. The pivot axes Sl, S2 are aligned parallel to each other and extend in the longitudinal direction L. For example, the Schwenkla gereinrichtung 37 connects the machine frame 11 with the pivot bracket 33 in the connecting area between the first leg 34 and the second leg 35 of the pivot bracket 33rd

Each tool unit 12, 13 also has a pivot drive 38 to the pivot position of the respective

Swivel bracket 33 to set the relevant swivel axis S1, S2. Each swivel drive 38 has a swivel drive motor 39 which can be controlled by the control device 27 and which can be designed, for example, as a screw drive 40. Via the swivel drive 38, a first wedge body 41 can be moved in the longitudinal direction L and, for example, be moved linearly ver. The first wedge body 41 has a first inclined surface 42 which is inclined relative to the transverse direction Q. In the transverse direction Q, the first inclined surface 42 runs, for example, without inclination. The swivel bracket 33 and in play the second leg 35 is supported at a support point 43 on the first inclined surface 42. From the support point 43 is arranged in the transverse direction Q at a distance from the relevant pivot axis Sl or S2. For flächi gene support, a second wedge body 44 is arranged on the swivel bracket 33 and, for example, the second leg 35 in the embodiment. The second wedge body 44 has a second inclined surface 45 which is inclined with respect to the longitudinal direction L. The second inclined surface 45 is in Cross direction Q, for example, inclination-free. The wedge angles of the first inclined surface 42 and the second inclined surface 45 are of the same magnitude. The second inclined surface 45 lies flat against the first inclined surface 42. When the first wedge body 41 is displaced in the longitudinal direction L by means of the swivel drive 28, the first inclined surface 42 and the second inclined surface 45 slide relative to one another.

By moving the first wedge body 41 in the longitudinal direction L, the position of the support point 43 shifts in the height direction H. Since the pivot bracket 33 is pivotally mounted on the pivot bearing device 37, a pivoting movement about the pivot axis in question

51 or S2 causes.

By means of the swivel drive 38, the swivel bracket 33 can rotate about the respective swivel axis S1 or

52 can be pivoted. The swivel bearing device 24 and the slide drive device 25 are also pivoted and inclined together with the swivel support 33, so that an angle of inclination is set between the two rolling rod profiles 20 of the two rolling rods 19 in the plane spanned by the height direction H and the transverse direction Q. The control device 27 preferably controls the swivel drives 38 of the two tool units 12, 13 in such a way that the same swivel angle amount is set about the first swivel axis S1 or the second swivel axis S2. Compared to a perpendicular to the height direction along the longitudinal axis A reference plane, the two tool units 12, 13 and roller rods 19 are aligned symmetrically.

FIGS. 2-6 show a specific embodiment. Form for the cold rolling machine 10 he explained with reference to the block diagram of Figure 1 illustrates. In particular, an embodiment for the implementation of the adjustment drive 36 and the swivel drive 38 are illustrated in these figures.

As is illustrated in particular in FIGS. 4-6, each swivel drive 38 has a shaft 50 which can be driven by the screw drive 40, for example a ball screw. The shaft 50 is mounted in the longitudinal direction L by means of a bearing 51 in the longitudinal direction L on the machine frame 11. With the shaft 50, the first wedge body 41 is arranged motion-coupled in the longitudinal direction L. For example, the first wedge body 41 can be connected to the shaft 50 by means of screws and / or a feather key. With a linear displacement of the shaft 50 by means of the screw drive 40, a movement of the shaft 50 in the longitudinal direction L is generated, which moves the first wedge body 41 in the longitudinal direction L.

By supporting the second wedge body 43 with its second inclined surface 45 on the first inclined surface 42 of the first wedge body 41, this causes a movement of the two th wedge body 43 in the height direction H. In this case, the shaft 50 is rotated radially in the bearing 51 in order to compensate for the change in angle of the swivel support 33 with respect to the transverse direction Q. The change in height also changes a chord in relation to the angle of inclination. This Län gene change is made possible by an allowable lateral displacement of the wedge body 41 and 43 in the transverse direction Q relative to each other. Since the second wedge body 43 was arranged from the relevant pivot axis S1 or S2 on the pivot carrier 33, the pivot carrier 33 is pivoted about the pivot axis S1 or S2 in question. The wedge angles, which include the first inclined surface 42 and the second inclined surface 43 relative to the longitudinal direction L, are of the same magnitude and, for example, less than 3-5 degrees. In the exemplary embodiment, the wedge angles are approximately 2 degrees. In the exemplary embodiment described here, a lifting movement of the second wedge body 43 in the height direction H of a maximum of 1.5 mm can be carried out.

The design of the swivel drive 38 is self-locking, so that a force acting in the height direction H on the swivel bracket 33 cannot cause movement of the first wedge body 41 in the longitudinal direction L.

As can be seen in Figure 6, a guide recess 53 for the first wedge body 41 is formed on the second wedge body 43 by two guide strips 52 which are spaced apart in the longitudinal direction. Each guide bar 52 can encompass an edge region of the first wedge body 41 for guiding the first wedge body 41. A permissible transverse displacement within the guide rails 52 is provided.

The adjustment drive 36 has a screw drive 40 which is driven by means of an adjustment drive motor 54. The screw drive can be designed as a ball screw drive. The adjusting drive 36 is coupled in the longitudinal direction L to a third wedge body 56 which has a third inclined surface 57 which is inclined with respect to the longitudinal direction L. The third wedge body 56 can be moved in the longitudinal direction L, for example via a slide bearing, is arranged on the swivel support and is supported, for example, on the second leg 35. A fourth wedge body 58 has a fourth inclined surface 59 which is inclined with respect to the longitudinal direction L and which lies on the third inclined surface 57. The third and fourth inclined surfaces 57, 59 are inclination-free in the transverse direction Q, for example.

The wedge angles of the third inclined surface 57 and the fourth inclined surface 59 relative to the longitudinal direction L are of equal magnitude, so that a flat contact between the third inclined surface 57 and the fourth

Inclined surface 59 is reached. In the exemplary embodiment, the wedge angles of the third inclined surface 57 and the fourth inclined surface 59 have an amount of at least 3 degrees and, according to the example, 5-9 degrees, preferably approximately 7 degrees. When the third wedge body 56 moves in the longitudinal direction L, the third inclined surface 57 and the fourth inclined surface 59 slide relative to one another, as a result of which the fourth wedge body 58 is moved parallel to the first leg 34 of the pivot carrier 33 and, for example, essentially in the height direction H be. Depending on the pivot position of Schwenkträ gers 33 about the pivot axis S1 or S2, the movement pa rallel to the first leg 34 is not exactly, but mainly oriented in the height direction H. At least it has a movement component in the vertical direction so that the profile distance d can be set. It is irrelevant that a slight movement of the roller bars 19 in the transverse direction Q may also be caused. This slight movement can be compensated for by the infeed of the workpiece in the transverse direction Q.

By means of the adjusting drive 36 and, for example, by this movement of the fourth wedge body 58, the profile distance d between the two rolling rods 19 before and / or during the generation of a profile in a workshop piece 14 can be adjusted or varied.

By means of the cold rolling machine 10 described above, a method illustrated in FIG. 7 can be carried out.

In a first process step VI, the process is started. After the start, an inclination angle between the two rolling rods 19 is first set in a second method step V2. In the simplest case, the angle of inclination can initially be 0 degrees, so that the two rolling rods 19 or the two rolling rod profiles 20 are aligned parallel to one another. In addition, the profile distance d is set by means of the adjusting drive 36.

In a third method step V3, a workpiece 14 to be profiled is arranged such that the section 15 to be profiled is located in the height direction H and in the transverse direction Q between the two rolling rods 19. At closing, in a fourth method step V4, an opposing movement of the two rolling rods 19 in the longitudinal direction L is carried out by means of the respective slide drive devices 25. At the same time, a movement of the rolling rods 19 in the height direction H can be overlaid. During the movement of the rolling rods 19 in the longitudinal direction L, the respective rolling rod profile 20 is in engagement with the portion 15 of the workpiece 14 to be reshaped and reshapes the portion 15 in its peripheral region, whereby a profile on the workpiece 14 is generated.

After the production of the profile in the fourth method step V4 is in a fifth method step V5 the workpiece 14 or at least the section 15 of the workpiece 14 provided with the profile hardened. During the hardening process, the profile produced may be tapered. Therefore, in a sixth method step V6, the conicity of the generated profile is determined and compared with a predetermined tolerance range. If the determined taper of the profile is not within a predetermined tolerance range (branching N from the sixth method step V6), the angle of inclination is changed in a seventh method step V7 based on the determined taper of the profile, so that the taper is taken into account in the profile subsequently produced the delay in hardening is within the tolerance range. After the correction in the seventh method step V7, the method is continued in the fourth method step V4, for example, with the renewed production of a profile and the renewed measurement (method step V6).

Subsequently, in the further course of the process, which is illustrated here by the eighth step V8, one or more further workpieces can be profiled in the cold rolling machine 10 at the set angle of inclination and then hardened. After the desired number of workpieces 14 has been profiled and hardened, the method ends in a ninth method step V9.

If it has emerged in the sixth method step V6 that the first profiled workpiece already has a taper of the profile after hardening which is within the tolerance range (branch J from the sixth method step V6), then the change in the inclination angle in the seventh method step V7 jumped and the process continued directly in the eighth process step V8.

The invention relates to a cold rolling machine 10 and a method for producing a profile on a workpiece 14. The cold rolling machine 10 has two preferably identical tool units 12, 13. Each tool unit 12, 13 has at least one longitudinally extending L rod 19, a tool slide 21, a slide drive device 25, a Schwenkträ ger 33 and a swivel drive 38. At least one roller rod 19 is fastened to the tool slide 21 and can be moved in the longitudinal direction L by means of the slide drive device 25. The swivel bracket 33 can be swiveled about a swivel axis S1, S2 which extends in the longitudinal direction L by means of the swivel drive 38. The tool slide 21 is arranged on the swivel carrier 33. As a result, an angle of inclination can be set between the two rolling rods 19, which can be, for example, from 0 degrees to 0.5 degrees or up to 0.2 degrees. As a result, conical profiles can be produced in the workpiece 14 or compensate for conical profiles due to the process.

Reference character list:

10 cold rolling machine

11 machine frame

12 first tool unit

13 second tool unit

14 workpiece

15 section of the workpiece to be profiled

19 roller rod

20 rolling rod profile

21 tool slides

22 bearing body

23 plain bearing element

24 slide bearing device

25 carriage drive device

26 carriage drive motor

27 control device

28 sprockets

29 rack

33 swivel bracket

34 first leg

35 second leg

36 adjusting drive

37 pivot bearing device

38 rotary actuator

39 slew drive motor

40 ball screw drive

41 first wedge body

42 first inclined surface

43 support point 44 second wedge body

45 second inclined surface

50 wave

51 Storage

52 guide bar

53 Guide recess

54 adjusting drive motor

55 threaded spindle

56 third wedge body

57 third inclined surface

58 fourth wedge body

59 fourth inclined surface inclination angle

A longitudinal axis of the workpiece d profile distance

H height direction

L longitudinal direction

Q transverse direction

51 first pivot axis

52 second swivel axis

VI first step

V2 second step

V3 third step

V4 fourth step

V5 fifth step

V6 sixth step V7 seventh step

V8 eighth step

V9 ninth procedural step

Claims

Claims:

1. Cold rolling machine (10) with a machine frame (11), with two tool units (12, 13), each tool unit (12, 13) having:

- At least one rolling rod (19) extending along a longitudinal direction (L), which has a rolling rod profile (20),

a tool slide (21) which carries the at least one roller rod (19) and which is mounted in a linearly movable manner in the longitudinal direction (L) by means of a slide bearing device (24),

- A slide drive device (25) which is directed to move the tool slide (21) in the longitudinal direction (L),

- A swivel support (33) which is pivotally mounted on a swivel bearing device (37) about a swivel axis (Sl, S2) on the machine frame (11) and on which the slide bearing device (24) and the tool slide (21) with the at least one Rolling rod (19) is arranged, the pivot axis (S1, S2) extending in the longitudinal direction (L),

- With a swivel drive (38) which is set up to the swivel support (33) with the tool slide (21) and the at least one roller rod (19) pivot so that the rolling rod profiles (20) of the rolling rods (19) enclose an inclination angle () in a plane perpendicular to the longitudinal direction (L).

2. Cold rolling machine according to claim 1,

characterized in that a control device (27) for controlling the swivel drives (38) of the tool units (12, 13) is provided and is set up to pivot the swivel supports (33) around the same

Swivel angle amount to swivel around the respective swivel axis (Sl, S2).

3. Cold rolling machine according to claim 1 or 2,

characterized in that each swivel drive (38) has a first wedge body (41) which has a first inclined surface (42) inclined with respect to a longitudinal direction (L) and wherein the swivel support (33) is located at a support point (43) on the supports first inclined surface (42), which is arranged radially to the pivot axis (Sl, S2) at a distance from the pivot axis (Sl, S2), the first wedge body (41) being movably supported in the longitudinal direction (L).

4. Cold rolling machine according to claim 3,

characterized in that each swivel drive (38) has a second wedge body (43) with a second inclined surface (45) inclined with respect to the longitudinal direction (L), the second wedge body (43) being arranged on the swivel support (33) and the second inclined surface che (45) on the first inclined surface (42).

5. Cold rolling machine according to claim 3 or 4,

characterized in that the first wedge body (41) is arranged on a shaft (50) which is rotatably mounted on the machine frame (11) so as to be linearly movable in the longitudinal direction (L).

6. Cold rolling machine according to claim 5,

characterized in that each swivel drive (38) has a screw drive (40) which is set up to move the shaft (50) in the longitudinal direction (L) because of.

7. Cold rolling machine according to one of the preceding claims

characterized in that on the swivel bracket (33) a bearing body (22) is movably mounted in a vertical direction (H) at right angles to the longitudinal direction (L).

8. Cold rolling machine according to claim 7,

characterized in that the tool slide (21) is movably mounted on the bearing body (22) in the longitudinal direction (L).

9. Cold rolling machine according to claim 7 or 8,

characterized in that the carriage drive device (25) is movable in the height direction (H) together with the bearing body (22) on the swivel bracket (33).

10. Cold rolling machine according to one of claims 7 to 9,

characterized in that an adjusting drive (36) is provided which moves the bearing body (22) in the vertical direction (H) relative to the swivel support (33).

11. Cold rolling machine according to claim 10,

characterized in that the adjusting drive (36) has a third wedge body (56) with a third inclined surface (57) inclined with respect to the longitudinal direction (L), which is movably mounted in the longitudinal direction (L) on the swivel carrier (33) and on which the bearing body is supported by (22).

12. Cold rolling machine according to claim 11,

characterized in that a fourth wedge body (58) having a fourth inclined surface (59) inclined with respect to the longitudinal direction (L) is arranged on the bearing body (22), the fourth inclined surface (59) abutting the third inclined surface (57) ,

13. Cold rolling machine according to one of the preceding claims,

characterized in that the carriage drive device (25) has a drivable pinion (28) and a rack (29) engaged with the pinion (28), the rack (29) extending in the longitudinal direction (L) and on the tool slide (21) is arranged.

14. Process for creating a profile on a plant

piece (14) using a cold rolling machine (10) according to one of the preceding claims, with the following steps:

- Setting an inclination angle () between the rolling rods (19) in the plane perpendicular to the longitudinal direction (L), - arranging a section (15) of the workpiece (14) to be profiled between the roller bars (19),

- Moving the rolling rods (19) in opposite directions to one another in the longitudinal direction (L), the rolling rod profiles (20) forming the section (15) of the workpiece (14) to be profiled.

15. The method according to claim 14,

characterized in that the section (15) of the workpiece (14) provided with the profile is hardened.

16. The method according to claim 14 or 15,

characterized in that, immediately after manufacture or after hardening, a taper of the profile is determined and compared with a tolerance range, and that the angle of inclination () is changed if the taper determined is not within the tolerance range.