DE102014215628A1 - A method for producing an inner ring or an outer ring for a planetary roller bearing, or a nut for a Planetenwälzgetriebe - Google Patents

Abstract

The invention relates firstly to a method for producing an inner ring (40) or an outer ring (50) for a planetary roller bearing (72) or a nut for a planetary roller gear, which is characterized by the following steps: a) generating a profile (14) at least in sections b) separating a section (18, 54) from the unilaterally profiled ribbon-shaped semifinished product (12), and c) bending the section (18, 54) into a hollow cylindrical shape. As a result, a continuous manufacturing process of the necessary for a planetary roller bearing (70, 100) or a Planetenwälzgetriebe bearing rings can be realized, so that reduce their manufacturing costs and increase the same variety largely free of cost with the same tools. In particular, planetary roller bearings (70, 100) or planetary roller gears with different bearing diameters can be produced by varying the length of the sections (18, 54) of the semifinished product (12). In addition, the invention relates to a planetary roller bearing (70, 100), which has an inner ring produced according to the method (40) and an outer ring (50) also produced, and a constructed with a mother according to the method constructed Planetenwälzgetriebe.

Description

Field of the invention

The invention relates to a method for producing an inner ring or an outer ring for a planetary roller bearing or a nut for a Planetenwälzgetriebe. Moreover, the invention relates to a planetary roller bearing with a plurality of rolling on an inner ring and on an outer ring cylindrical rolling elements, wherein the rolling elements are arranged at least einreihig and the inner ring has a radial outer profile and the outer ring has a radial inner profile, wherein the rolling elements in each case at least in sections Have radial rolling element outer profile, and in which the rolling body outer profile engages at least partially in the outer profile of the inner ring and the inner profile of the outer ring. Furthermore, the invention relates to a Planetenwälzgetriebe with a plurality of rolling on a threaded spindle and a nut and cylindrical rolling elements, wherein the rolling elements are arranged at least einreihig and the threaded spindle has a radial external thread and the nut has a radial inner profile, and the rolling elements in each case at least in sections Having Wälzkörperaußenprofil, and in which the rolling element outer profile at least partially engages in the external thread of the threaded spindle and in the inner profile of the nut, such that during a relative rotation of the threaded spindle and nut to each other there is an axial displacement thereof to each other.

Background of the invention

Planetenwälzgetriebe are known from the prior art in a wide range of variations. Such Planetenwälzgetriebe serve to implement a high speed rotational movement in a slow translational movement with high power delivery. Furthermore, planetary roller bearings are known in which there is no implementation of a rotational movement in a linear movement, but in the axial and radial direction due to not only punctiform or approximately linear contact surfaces between the rolling elements and the inner ring and outer ring have a high load capacity.

From the DE 10 2013 202 700 A1 is a planetary gear known, which has inter alia a spindle with an outer profile and a spindle nut with an inner profile. Between the spindle and the spindle nut a plurality of planetary bodies are rotatably arranged on a planet carrier, which mesh by means of at least one profile section with said outer profile and said inner profile. In a relative rotation between the spindle and the spindle nut, which is forced by a drive device, an axial displacement of the two components is forced via an axial travel along the longitudinal axis of the spindle.

The disadvantage is that in all known planetary roller bearings and Planetenwälzgetrieben the inner profiles and outer profiles are produced in a costly manner by means of machining production process from corresponding axially cut hollow cylindrical or cylindrical semi-finished products.

Object of the invention

The invention has for its object to introduce a new manufacturing process for planetary roller bearings and Planetenwälzgetriebe that allows, inter alia, the production of a large variety of types with the same tools at the same time with relatively low production costs. In addition, the invention has for its object to provide a process according to manufacture planetary roller bearings and a method according to manufacture producible planetary gear.

Description of the invention

The invention is based on the recognition that the cost of production can be reduced by the use of continuously running production processes and at the same time the number of types producible with the same tools can be increased.

• a) zumindest bereichsweise Erzeugen eines Profils auf einer ersten Seite eines bandförmigen Halbzeugs,
• b) Abtrennen eines Abschnitts von dem profilierten bandförmigen Halbzeug, und
• c) Biegen des Abschnitts des profilierten Halbzeugs in eine hohlzylindrische Form.

The invention therefore initially relates to a method for producing an inner ring or an outer ring for a planetary roller bearing or a nut for a planetary roller gear, which is characterized by the following steps:

• a) generating a profile on a first side of a strip-shaped semifinished product at least in regions
• b) separating a section from the profiled band-shaped semi-finished product, and
• c) bending the section of the profiled semi-finished product into a hollow cylindrical shape.

As a result, in comparison to a cutting production of a profile of cut pipe sections cost-effective, since continuous production required for Planetenwälzlager or Planetenwälzgetriebe inner rings and outer rings and the nuts for Planetenwälzgetriebe by rolling or rolling given. The necessary for Planetenwälzgetriebe threaded spindles are generally produced by rolling cylindrical semi-finished products.

The band-shaped semi-finished product can be formed as a sheet or as a fiber-reinforced plastic be, in the latter case, the plastic semi-finished product using a material band-generating, profiled spray nozzle is made. Subsequently, sections of suitable length are separated from the one-sided profiled metallic semi-finished product or extruded strip in order to produce the bearing rings for a planetary roller bearing or a nut for a planetary roller gear as described.

According to an advantageous development of the method described above, it is provided that the profile is produced on the first side of the band-shaped semifinished product by unrolling a profiling tool, wherein the profile has a plurality of uniformly spaced parallel grooves with a V-shaped cross-sectional geometry. By producing the profile by rolling or rolling a particularly cost-effective and mass production suitable manufacturing method is used compared to a chipping training of the profile.

Another development of the method provides that are formed on the portion of the profiled semi-finished by the separation of two axial end faces with an arbitrarily contoured course. In this way, a mechanical connection between the two axial end faces of a portion of the one-sided profiled semi-finished product can be created, which abut each other in the bent state of the section. The two axial end faces preferably have a complementary contour to each other, which, similar to undercut dovetail joints, mated puzzle pieces or the like, interlock with each other and allows a positive connection between the two axial end faces of a portion of the one-sided profiled semi-finished product. In this way, in particular, a radial spreading of the outer ring of a planetary roller bearing produced according to the method or a nut of a planetary gear transmission is avoided if these are not accommodated in a cylindrical receptacle of a further component or the like.

It can further be provided that the two axial end faces of the section of the profiled semifinished product are in each case designed to extend in a straight line and at an angle α between 15 ° and 75 ° to a longitudinal central axis of the section. Because of the obliquely extending axial end faces of a portion of the one-sided profiled semi-finished product, a comparatively soft rollover process of the rolling elements arranged in the planetary roller bearing or in the planetary roller gear is ensured, in particular in the region of the abutting axial end faces of the hollow cylinder sections.

According to another embodiment of the method is provided that is formed by bending over a portion of the one-sided profiled semi-finished with its axial end faces in the direction of its profile, an outer ring with a radial inner profile for a planetary roller bearing or a nut with a radial inner profile for a planetary gear, and that an inner ring with a radial outer profile for a planetary rolling bearing is formed by the bending of a portion of the semi-finished profiled semi-finished product with its axial end faces in the opposite direction. As a result, the inner profile and the outer profile for the bearing rings of a Planetenwälzlagers can be made in a simple manner by changing the bending direction. Analogous to the outer ring with inner profile, a nut can be produced with an inner profile for a Planetenwälzgetriebe.

Another favorable development of the method according to the invention provides that the outer profile of the inner ring and the inner profile of the outer ring are formed offset from each other with respect to the bearing center axis. As a result, in the case of an X-arrangement or an O-arrangement of two planetary roller bearings according to the invention or in the case of a double-row design, a so-called X-bias or a so-called O-bias can be set in the rolling bearing.

According to another feature can be provided that the axial end faces of the inner ring are firmly connected together. As a result, the mechanical strength of the inner ring is increased. The joining of the axial end faces can be done for example by a peripheral laser welding or by soldering on the side facing away from the profile side of the inner ring. Alternatively, the axial end faces of the inner ring can also be connected to each other by a positive connection or by gluing, caulking, jamming or pressing.

Likewise, the method can be developed such that the axial end faces of the outer ring or the nut are connected to each other only after their assembly in a Planetenwälzlager or Planetenwälzgetriebe. As a result, a radial spreading of the outer ring or the nut is avoided in its installed position, if they are not included in a mounting hole of another component or the like. In advance, the outer ring or the nut during assembly of a planetary roller bearing or a Planetenwälzgetriebes be easily spread radially for easy filling with rolling elements with little use of force.

In addition, the invention relates to a planetary roller bearing with a plurality of on a Inner ring and rolling on an outer ring cylindrical rolling elements, wherein the rolling elements are arranged at least one row and the inner ring has a radial outer profile and the outer ring has a radial inner profile, the rolling elements each at least partially have a radial Wälzkörperaußenprofil, the Wälzkörperaußenprofil at least partially in the outer profile of Inner ring and the inner profile of the outer ring engages. To solve the relevant object, it is provided that the outer profile of the inner ring and the inner profile of the outer ring each have a plurality of circumferential and evenly spaced parallel grooves with a respective V-shaped cross-sectional geometry, and that also the cylindrical rolling elements each having a Wälzkörperaußenprofil with a plurality have circumferential and mutually equally spaced parallel annular grooves having a respective V-shaped cross-sectional geometry.

As a result, a manufacturing technology simple and continuous and therefore cost-effective production of a planetary roller bearing with a large variety of types of bearings with the same tools is possible. In particular, planetary roller bearings with different diameters can be produced in a simple manner by corresponding cutting to length, profiling and bending of the semifinished product profiled on one side. In addition, given by the V-shaped cross-sectional geometry of the grooves on the bearing rings and the rolling elements a very large contact surface between the outer Wälzkörperauprofil and the outer profile of the inner ring and the inner profile of the outer ring. By corresponding to the outer profile of the inner ring and the inner profile of the outer profile formed Wälzkörperaußenprofile engage the profiles mutually interdependently, resulting in a high load capacity of Planetenwälzlagers results.

It can further be provided that the rolling elements are received in a cage. As a result, a uniform, circumferential and low-friction spacing of the rolling elements is given to each other. The cage is also preferably formed by a portion of suitable length from a tread band and then bending it into a hollow cylinder.

Finally, the invention relates to a Planetenwälzgetriebe with a plurality of rolling on a threaded spindle and a nut and cylindrical rolling elements, wherein the rolling elements are arranged at least einreihig and the threaded spindle has a radial external thread and the nut has a radial inner profile, and the rolling elements in each case at least in sections Have Wälzkörperaußenprofil. In this case, the Wälzkörperaußenprofil engages at least partially in the external thread of the threaded spindle and in the inner profile of the nut, such that during a relative rotation of the threaded spindle and nut to each other an axial displacement of the same takes place. To achieve the object, it is provided that the mother of the Planetenwälzgetriebes is made according to at least one of the method claims of a band-shaped, cut to length and one-sided profiled V-shaped semi-finished, and that the cylindrical rolling elements each have a Wälzkörperaußenprofil with a plurality of circumferential and evenly to each other having spaced parallel annular grooves each having a V-shaped cross-sectional geometry.

As a result, a cost-optimal production of Planetenwälzgetrieben can be realized analogous to said planetary roller bearing. The Planetenwälzgetriebe can also be equipped with a cage for guiding the rolling elements.

By trained geometrically corresponding to the external thread of the threaded spindle and the inner profile of the nut Wälzkörperaußenprofil this can engage at least partially in the inner profile of the nut and the external thread of the threaded spindle.

Brief description of the drawings

To further explain the invention, the description of several drawings are attached, are shown in the individual process steps and different views of a method according to the invention Planetenwälzlagers. Structurally identical components are provided with the same reference numerals. Showing:

1 a first step of a method for producing an inner ring or an outer ring for a planetary roller bearing or a nut for a Planetenwälzgetriebe according to the invention,

2 a second step of this process,

3 a third step of this method of manufacturing an inner ring,

4 a perspective view of an inner ring and an outer ring, which were prepared according to the invention and assembled coaxially without rolling elements,

5 a perspective view of a full complement, cageless Planetenwälzlagers with the inner ring and the outer ring according to 4 and with radially arranged therebetween rolling bodies,

6 a perspective view of a cage made of a profile band,

7 a perspective view of a complete planetary roller bearing with the inner ring and the outer ring according to 4 , with the cage according to 6 , as well as rolling elements inserted in the cage, and

8th a rolling element with annular grooves, which in the planetary roller bearing according to 5 or 7 can be used.

Detailed description of the drawings

The 1 to 3 each show in a simplified perspective view of manufacturing steps of the inventive method for producing an inner ring and an outer ring for a planetary roller bearing. First, according to 1 a band-shaped semi-finished product 12 unwound from a drum and passed between two rollers. The lower roller has an unprofiled lateral surface, while the lateral surface of the upper roller 11 with a profile 14 is provided. This profile 14 will be on the first page 10 which in this case the top of the band-shaped semi-finished product 12 is imprinted. That on the former side 10 of the band-shaped semi-finished product 12 generated profile 14 has a plurality of not individually designated, evenly spaced parallel grooves 16 or grooves with a respective V-shaped cross-sectional geometry.

In a second method step is according to 2 a section 18 from the band-shaped, now one-sided profiled semi-finished product 12 separated by a length L, the first page 10 with the profile 14 is provided while that of the first page 10 opposite second side 20 not profiled. The width B of the section 18 the one-sided profiled semi-finished product 12 corresponds approximately to the axial length of the cylindrical rolling elements used for the planetary rolling bearing 72 ( 8th ).

The section 18 de half-profiled semifinished product 12 has here a quadrangular cross-sectional geometry, but it may deviate from this but also have an axial end wedge-shaped cross-sectional geometry, and it is preferably formed from a metallic material. For comparatively low strength requirements, the semifinished product 12 also be formed from a plastic, optionally a fiber-reinforced plastic.

The feed direction of the one-sided profiled semi-finished product 12 through a separator 22 is with an arrow 13 characterized. The section 18 the one-sided profiled semi-finished product 12 Here, by way of example only, has two rectilinear and mutually parallel axial end faces 24 . 26 in each case at an angle α obliquely with respect to a longitudinal central axis 28 of the section 18 the one-sided profiled semi-finished product 12 run. Deviating from the rectilinear shape, the two axial end faces 24 . 26 have any contour. For example, the axial end faces 24 . 26 have mutually complementary contours, so that the axial end faces 24 . 26 to form a bearing ring of a planetary roller bearing sections are positively engageable with each other engageable. Alternatively, the axial end faces 24 . 26 To form a bearing ring also glued, pressed, caulked or thermally joined by soldering or peripheral laser welding.

In 3 is the section 18 of the cut profiled semifinished product 12 so oriented that its profiled first page 10 pointing down towards a storage area, not shown. As 3 illustrated, is the one-sided profiled and initially even flat section 18 of the cut to length, one-sided profiled semi-finished product 12 brought into a hollow cylindrical shape by circumferentially uniform bending. The bending directions are in 3 through the two arrows 30 . 32 specified.

When this bending process is completed, the two axial faces are located 26 . 28 abutting each other and forming an inner ring 40 with a diameter D for the process according to manufacture here full complement planetary roller bearing. The length L of the section 18 is dimensioned so that the desired diameter D results. As 3 also shows, the section 18 or its axial end faces 24 . 26 towards the profile 14 opposite, profile-less second side 20 bent to an inner ring for a planetary roller bearing 40 with a radial outer profile 42 manufacture.

When reversing the bending direction 30 . 32 , so if the axial end faces 24 . 26 towards the profile 14 or to the first page 10 can be bent, an outer ring can be made with a radial inner profile, wherein the length L must be chosen to be correspondingly larger.

This can be easily done by varying a length of the section 18 of the cut to length, one-sided profiled semi-finished product 12 Inner rings with radial outer profiles and outer rings with radial inner profiles for a planetary roller bearing, or produce a nut with an inner profile for a Planetenwälzgetriebe with different bearing diameters.

4 shows an inner ring produced according to the method 40 and an equally made outer ring 50 , The inner ring 40 with its radial outer profile 52 is coaxial within the outer ring to prepare the final assembly of the planetary roller bearing 50 arranged. The production of the outer ring 50 apart from the direction of bending used, bending another section 54 from the one-sided profiled semi-finished product 12 analogous to the production of the inner ring 40 until the two axial faces 56 . 58 the further section 54 abut each other and the desired hollow cylindrical shape is reached.

The substantially abutting axial end faces 24 . 26 of the inner ring 40 can be joined at this stage of the process, for example by peripheral laser welding, glued and / or positively connected. To the introduction of rolling elements 72 radially between the inner ring 40 and the outer ring 50 facilitate in the course of the final assembly of the planetary roller bearing, the axial end faces 56 . 58 of the outer ring 50 preferably not yet connected to each other, and can be used for insertion of rolling elements 72 be spread apart springing apart.

5 shows a perspective view of a full complement, cageless planetary roller bearing 70 with the inner ring 40 and the outer ring 50 of the 4 with inserted rolling elements 72 , The planetary roller bearing 70 Accordingly, it comprises a manufactured according to the inner ring 40 and an equally manufactured outer ring 50 with a plurality of radially between inner ring 40 and outer ring 50 arranged rolling elements 72 ,

As 8th shows, have the substantially cylindrical and each identically formed rolling elements 72 via a geometrically corresponding to the outer profile 42 of the inner ring 40 and the inner profile 52 of the outer ring 50 trained Wälzkörperaußenprofil 74 with a plurality of circumferential as well as equally spaced parallel annular grooves 73 with a V-shaped cross-sectional geometry. As a result, the Wälzkörperaußenprofile stand 74 in the inserted state of the rolling elements 72 at least partially engaged with the outer profile 42 of the inner ring 40 and the inner profile 52 of the outer ring 50 , The rolling element outer profile 74 becomes according to the profiling of the semi-finished product 12 also preferably formed by rolling or by rolling.

Between the inner ring 40 and the outer ring 50 of the planetary roller bearing 70 is a maximum number of rolling elements 72 arranged so that a cage for the circumferentially uniform spacing of rolling rolling elements 72 is dispensable and tumbling movements of each along their longitudinal extent adjacent rolling elements 72 each transverse to the bearing center axis 78 of the planetary roller bearing 70 be largely avoided.

Due to the intimate interlocking of the rolling element outer profile 74 with the radial outer profile 42 of the inner ring 40 and the radial inner profile 52 of the outer ring 50 achieves this with the insertion of the rolling elements 72 completely assembled planetary roller bearings 70 in conjunction with the full complement design a high radial and axial load capacity. Furthermore, the axial end faces extend 24 . 26 of the inner ring 40 as well as the axial end faces 54 . 56 of the outer ring 50 at the angle α to the longitudinal central axis 28 or to a longitudinal central axis 76 of the respective section of the cut to length. one-sided profiled semi-finished product 12 that make up the inner ring 40 and the outer ring 50 were produced by molding according to the method.

After inserting the rolling elements 72 radially between the inner ring 40 and the outer ring 50 can the axial end faces 54 . 56 of the outer ring 50 optionally analogous to both axial end faces 24 . 26 of the inner ring 40 still be joined. The axial end faces 54 . 56 of the outer ring 50 can be connected by positive engagement or by gluing, pressing, caulking or by thermal joining, such as by soldering or peripheral laser welding. Furthermore, the planetary roller bearing 70 instead of the only exemplary shown single-row arrangement of the rolling elements 72 also be formed multi-row.

In the completed full complement planetary roller bearing 70 roll the rolling elements 72 on the example, rotatably mounted inner ring 40 and on the outer ring 50 off, with the outer ring 50 a rotational movement about a bearing center axis 78 takes place.

6 shows a perspective view of a built-up of a profile band cage. A cut profile band 80 , which has been produced for example by an injection molding process, is an approximately hollow cylindrical cage 82 bent around, with the two axial ends 84 . 86 of the profile band 80 in the area of a separation point 88 glued together, thermally joined or positively connected with each other, for example. The cage 82 also has two annular and parallel spaced and congruent arranged cage sides 90 . 92 , by a plurality of circumferentially uniformly spaced, not individually designated axial webs 94 connected to each other. Between each two adjacent bars 94 and the two cage sides 90 . 92 are in the cage 82 not individually marked pockets 96 for receiving rolling elements, not shown here 72 educated. By corresponding cutting of the profile strip 80 can the cage 82 also be easily prepared for the planetary roller bearings with different bearing diameters.

7 shows a perspective view of a planetary roller bearing 100 with the cage 82 of the 6 , This planetary roller bearing 100 has inter alia the inner ring produced according to the method 40 and the outer ring also made 50 on. In contrast to the embodiment of the planetary roller bearing 70 of the 5 are not continuously designated rolling elements 72 of the planetary roller bearing 100 in the cage 82 of the 6 added. The rotatable mounting of the rolling elements 72 in the cage 82 takes place in this embodiment by means of the front side of the rolling elements 72 trained journal 75 that are in opposite recesses 97 the cage sides 90 . 92 in the area of each bag 96 are received rotatably.

Preferably, the rolling elements 72 first in the cage 82 used and this is then then radially between the inner ring 40 and the outer ring 50 coaxial with a bearing center axis 102 placed. Finally, if necessary, the ends 54 . 56 of the outer ring 50 be joined together while the ends 24 . 26 of the inner ring 40 preferably already been joined together.

The process for producing a nut for a planetary gear transmission essentially corresponds to the above-described production sequence for producing the outer ring 50 for the two embodiments of the planetary roller bearing 70 . 100 of the 5 and 7 , First, a nut with an inner profile analogous to the outer ring 50 the planetary roller bearing of the 1 to 3 manufactured. Subsequently, a plurality of rolling elements analogous to the assembly of the planetary roller bearing 70 grouped around a threaded rod with an external thread around and the nut placed on the rolling elements. Optionally, the two circumferential ends of the nut are suitably connected to each other after placing the nut on the rolling elements.

Between the Wälzkörperaußenprofil and the external thread of the threaded spindle and the inner profile of the nut in turn there is an at least partial engagement, which in contrast to the Planetenwälzlagern in a relative rotational movement between the threaded rod and the nut due to the slope of the external thread of the threaded spindle to an axial displacement of the nut comes in relation to the threaded spindle. In this process, depending on the pitch of the external thread of the threaded spindle, a fast rotational speed of the threaded spindle is transformed into a comparatively slow axial displacement movement of the nut relative to the threaded spindle or vice versa, so that the planetary gear is particularly suitable for use in electric motor driven linear actuators. The Planetenwälzgetriebe may optionally have recorded in a cage rolling elements. Furthermore, the planetary gear can be formed in a single row or multi-row depending on the load requirements.

LIST OF REFERENCE NUMBERS

10

First page of the semi-finished product 12

11

 profiling

12

 Workpiece

13

Feed direction of the semifinished product 12

14

 profile

16

 Grooves of the profile

18

 Section of the profiled semifinished product

20

 Profile-free second side of the semifinished product or section of the semifinished product

22

 separating device

24

 First end edge of the section

26

 Second end edge of the section

28

 Longitudinal axis of the section of the profiled semi-finished product

30

 bending direction

32

 bending direction

40

 inner ring

42

External profile on the inner ring 40

50

 outer ring

52

Inner profile on the outer ring 50

54

 Section of the profiled semifinished product

56

First end edge of the section 54

58

Second end edge of the section 54

70

 Planetary rolling bearing, cageless variant

72

 rolling elements

73

Ring groove in the rolling element outer profile 74

74

 Wälzkörperaußenprofil

75

Bearing journal on the rolling element 72

76

 Longitudinal axis of a portion of the profiled semi-finished product

78

 Bearing center axis

80

Profile tape for the production of the cage 82

82

 Cage

84

First end of the profile band 80

86

Second end of the profile band 80

88

 separation point

90

 First axial cage side

92

 Second axial cage side

94

Footbridge of the cage 82

96

Bag of the cage 82

97

Recesses in the cage sides 90 . 92 for the journals 75

100

 Planetary roller bearing (cage variant)

102

Bearing center of the planetary roller bearing 100

α

 angle

L

Length of the section 18

B

Width of the section 18

D

 Diameter (inner ring, outer ring)

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 102013202700 A1 [0003]

Claims (10)

Method for producing an inner ring ( 40 ) or an outer ring ( 50 ) for a planetary roller bearing or a nut for a Planetenwälzgetriebe, characterized by the following steps: a) at least partially generating a profile ( 14 ) on a first page ( 10 ) of a band-shaped semi-finished product ( 12 ), b) separating a section ( 18 . 54 ) of the profiled band-shaped semi-finished product ( 12 ), and c) bending the section ( 18 . 54 ) of the profiled semifinished product ( 12 ) in a hollow cylindrical shape. Method according to claim 1, characterized in that the profile ( 14 ) on the first page ( 10 ) of the band-shaped semi-finished product ( 12 ) by rolling a profiling tool ( 11 ), the profile ( 14 ) a plurality of evenly spaced parallel grooves (US Pat. 16 ) having V-shaped cross-sectional geometry. Method according to one of claims 1 or 2, characterized in that on the section ( 18 . 54 ) of the profiled semifinished product ( 12 ) by separating two axial end faces ( 24 . 26 . 56 . 58 ) are formed with an arbitrarily contoured course. A method according to claim 3, characterized in that the two axial end faces ( 24 . 26 . 56 . 58 ) of the section ( 18 . 54 ) of the profiled semifinished product ( 12 ) each straight and at an angle α between 15 ° and 75 ° to a longitudinal central axis ( 28 ) of the section ( 18 . 54 ) are formed running. Method according to one of claims 1 to 4, characterized in that by bending over a portion of the one-sided profiled semi-finished product ( 12 ) with its axial end faces ( 56 . 58 ) in the direction of his profile ( 14 ) the outer ring ( 50 ) with a radial inner profile ( 52 ) for a planetary roller bearing ( 70 ) or a nut is formed with a radial inner profile for a Planetenwälzgetriebe, and that by bending over a portion of the one-sided profiled semi-finished product ( 12 ) with its axial end faces ( 56 . 58 ) in the opposite direction an inner ring ( 40 ) with a radial outer profile ( 42 ) for a planetary roller bearing ( 70 . 100 ) is formed. Method according to claim 5, characterized in that the radial outer profile ( 42 ) of the inner ring ( 40 ) and the radial inner profile ( 52 ) of the outer ring ( 50 ) in relation to the bearing center axis ( 78 ) are formed offset from each other. Method according to one of claims 1 to 6, characterized in that the axial end faces ( 24 . 26 ) of the inner ring ( 40 ). Method according to one of claims 1 to 6, characterized in that the axial end faces ( 56 . 58 ) of the outer ring ( 50 ) or the nut after mounting in a planetary roller bearing ( 70 . 100 ) or Planetenwälzgetriebe be interconnected. Planetary roller bearings ( 70 ) with a plurality of on an inner ring ( 40 ) and on an outer ring ( 50 ) rolling cylindrical rolling elements ( 72 ), wherein the rolling elements ( 72 ) are arranged at least one row and the inner ring ( 40 ) a radial outer profile ( 42 ) as well as the outer ring ( 50 ) a radial inner profile ( 52 ), wherein the rolling elements ( 72 ) at least in sections a radial rolling element outer profile ( 74 ), and in which the rolling body outer profile ( 74 ) at least partially in the outer profile ( 42 ) of the inner ring ( 40 ) and the inner profile ( 52 ) of the outer ring ( 50 ) engages, characterized in that the outer profile ( 42 ) as well as the inner profile ( 52 ) a plurality of circumferential and mutually uniformly spaced parallel grooves ( 16 ) having a respective V-shaped cross-sectional geometry, and that the cylindrical rolling elements ( 72 ) each have a rolling element outer profile ( 74 ) having a plurality of circumferential and mutually uniformly spaced parallel annular grooves having a respective V-shaped cross-sectional geometry. Planetenwälzgetriebe with a plurality of rolling on a threaded spindle and a nut and cylindrical rolling elements, wherein the rolling elements are arranged at least one row and the threaded spindle has a radial external thread and the nut has a radial inner profile and the rolling elements each at least partially have a Wälzkörperaußenprofil, and wherein the Wälzkörperaußenprofil engages at least partially in the external thread of the threaded spindle and in the inner profile of the nut, such that during a relative rotation of threaded spindle and nut to each other there is an axial displacement of each other, characterized in that the mother of Planetenwälzgetriebes according to at least one of the method claims of a band-shaped , cut to length and unilaterally V-shaped profiled semi-finished products ( 12 ) is manufactured, and that the cylindrical rolling elements ( 72 ) each have a rolling element outer profile ( 74 ) with a plurality of circumferential and equally spaced parallel annular grooves ( 73 ) having a respective V-shaped cross-sectional geometry.

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