DE102017120618A1 - Device for producing a first and second curved end surface on a roller for a roller bearing and method for producing the first and second curved end surface on the roller with the device - Google Patents

Abstract

Device 1 for producing a first and second curved end face 5ak, 5bk on a roller 5 for a roller bearing, the device 1 comprising a bearing device 3 for movably supporting the roller 5 in a machining position P, wherein a curved course of the first and second end faces 5ak , 5bk of the roller 5 in the machining position P can be generated, wherein the device 1 comprises a first grinding wheel 2a, which is driven to rotate about a first drive axis X1 and wherein the device 1 comprises a second grinding wheel 2b, which is drivable to rotate about a second drive axle X2 wherein the first grinding wheel 2a has a grinding surface 7 radially aligned with the first driving axis X1 for grinding the curved shape of the first end surface 5ak of the roller 5, and the second grinding device 2b has a grinding surface 8 oriented radially to the second driving axis X2 for grinding the curved one Course of the two ten end face 5bk of the roller 5 has.

Description

The invention relates to a device for producing a first and second curved end face on a roller for rolling bearings. The device comprises a bearing device for movably supporting the roller in a machining position in which a curved course of the first and second end faces of the roller can be generated. The device comprises a first grinding wheel which can be driven to rotate about a first drive axis and a second grinding wheel which can be driven to rotate about a second drive axis. The invention also relates to a method for producing the first and second curved end faces on the roll with the device.

It is often necessary to grind an end face of a rolling element in order to give the end face a certain shape and / or to create a high-quality surface. Already grinding devices are known in which two end faces of the rolling element are ground simultaneously by two grinding wheels.

For example, the document describes DE 2 253 783 a method and apparatus for grinding the faces of cylindrical bodies. The cylindrical bodies are moved forward on a circular path and also rotate about their own axes. The end faces of the body are associated with two drivable grinding wheels, which simultaneously grind the two end faces with their axially aligned side surfaces.

The invention has for its object to provide a device and a method for manufacturing time-saving and cost-effective production of a first and second end face with a curved course on a roller for a rolling bearing. This object is achieved by a device for producing a first and second curved end face on a roller for a roller bearing having the features of claim 1 and by a method for producing a first and second curved end face on the roller with the device having the features of claim 9 solved. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims of the following description and / or the accompanying figures.

It is proposed a device which is adapted to produce a first and second curved, in particular spherical and / or spherically curved end face on a roller for a roller bearing. Preferably, the roller to be processed as a rolling body with a roller shell surface and two preferably circular, initially plan, end faces formed. In particular, the roller jacket surface is arranged and / or aligned radially with respect to a rotation axis of the roller. In particular, the end faces on both sides of the roller shell surface, in particular axially aligned and / or arranged.

It is particularly preferred that each of the end faces has a central recess around the roller axis, in particular a so-called dome. This is particularly true in the manufacture of a roll blank of the roll, e.g. by cold extrusion, formed.

For example, the roller is designed as a cylindrical roller, tapered roller, needle roller or barrel roller. Also special forms of the roller-shaped rolling element are possible within the scope of the invention. Optionally, the device comprises the roller. Preferably, the roller has a diameter of at most 30 millimeters, in particular of at most 20 millimeters and in particular of a maximum of 10 millimeters. In particular, the role as rolling elements for integration and / or for use in a rolling bearing and / or in a small rolling bearing is suitable and / or trained.

Preferably, the device is designed to provide the two end faces of the roller with a curved course and / or to produce two curved end faces on the roller. The curved end faces, in particular the curved course of the two end faces, are preferably produced from the initially flat end faces and optionally additionally from edge regions of the roller jacket surface which adjoin the respective end faces.

Preferably, the curved end surfaces are convex and / or curved axially outwardly. In particular, the curved end faces have a convex and / or curved outward course. It is particularly preferred that the curved course of each of the end faces is formed by a superimposition of a basic curvature profile and a logarithmic curvature profile. Preferably, the base curve is formed by a circular arc portion whose center lies on the axis of rotation of the roller, in particular of the rolling element. In particular, the logarithmic curvature profile is arranged at least in one edge section of each of the curved end faces. Optionally, the curved end surfaces are torus-shaped, in particular donut-shaped and / or floating-tire-like, in particular each of the curved end faces has a torus-shaped, in particular donut- and / or floating-tire-like course. Preferably, at least one center of at least one circle forming the torus-shaped course lies on one Circle around the axis of rotation of the roller, in particular of the rolling element.

The device comprises a bearing device which is designed for the movable mounting of the roller in a processing position. Preferably, the role in the processing position in or on the storage device is movable, in particular rotatable and / or rotatable stored. In particular, the roll is movably held and / or supported in the processing position by the storage device. In the processing position, the curved course of the first and second end faces of the roll can be generated.

The device comprises a first grinding wheel, which can be driven to rotate about a first drive axis, and a second grinding wheel, which can be driven to rotate about a second drive axis. Preferably, the first grinding wheel can be driven by a first actuator, in particular by a first motor device, and the second grinding wheel can be driven by a second actuator, in particular by a second motor device. In particular, the first grinding wheel is designed for grinding the curved course of the first end face. The second grinding wheel is designed in particular for grinding the curved course of the second end face. In particular, the grinding wheels are designed to produce the curved end faces, in particular to grind the initially flat end faces and optionally additionally the edge regions of the roller shell surface in such a way that the two end faces are curved, in particular maintain the curved course.

According to the invention, the first grinding wheel has a grinding surface which is oriented radially to the first drive axis and which is designed to grind the curved course of the first end face of the roller. In addition, the second grinding device has a grinding surface which is oriented radially to the second drive axis and which is designed to grind the curved course of the second end face of the roller. In particular, the grinding surfaces are introduced on cylinder jacket surfaces of the grinding device. For example, each of the grinding surfaces has a profile which is suitable and / or designed for producing the corresponding curved end surface. The grinding wheels, in particular the grinding surfaces, are preferably formed from a cubic crystalline boron nitride (CBN) for grinding steel rollers or from a polycrystalline diamond for grinding ceramic rollers.

It is particularly preferred that the curved end faces of the roller are produced by the roller is driven to rotate about its axis of rotation and the grinding wheels are driven to rotate with the frontally arranged profiled grinding surfaces about the respective drive axis. In particular, the curved end faces of the roller can be produced by rotational movements of the roller and the respective grinding wheel which are performed transversely to each other.

Preferably, the central depressions in the end faces are provided to prevent contact of the respective grinding wheel with the roller axis during and / or during a grinding operation. As a result, a later functioning of the roll can be ensured in an advantageous manner.

It is known from the prior art to produce rolling elements with a curved end face and a diameter of preferably more than 30 millimeters by hard turning. Optionally, such rolling elements can also be produced in a plunge grinding process, in which each end face is ground separately, in particular successively or also successively on two processing stations. In order to supply rolls during processing and at the same time to set them in rotation, a continuously rotating drive device with a circulating driver belt is likewise known from the prior art.

The present device and the present method advantageously offer the possibility of economically producing rollers, in particular rolling elements, with a first and second curved end face and with a diameter of less than 30 millimeters and / or in a short cycle time. In particular, the curved course of the first and second end faces can be generated simultaneously, in particular simultaneously, with the present device and / or with the present method. As a result, manufacturing time and costs can be saved.

In a preferred embodiment of the invention, the device has a drive device. Preferably, the drive means is adapted to generate a rotation of the roller about the axis of rotation of the roller in the machining position. In particular, the roller and the two grinding wheels are arranged relative to one another such that the axis of rotation of the roller extends transversely, in particular at right angles, to the first drive axis of the first grinding wheel and / or to the second drive axis of the second grinding wheel.

In a preferred embodiment of the invention, the roller is guided by the bearing device and by the drive device, in particular in the processing position, three-point. Alternatively or optionally complementing the role in the processing position on the storage device and three-point bearings on the drive unit. In particular, this can ensure that the roll is rotatably drivable and / or rotatable in the machining position.

A particularly preferred structural implementation of the invention provides that the drive device comprises a revolving treadmill and at least two deflection rollers, wherein the treadmill is guided over the at least two deflection rollers and / or revolves around them. For example, the at least two pulleys are arranged in a plan view congruent and / or parallel. Optionally, at least one of the diverting pulleys is provided by an actuator, e.g. by a motor device, driven in rotation about a deflection axis and / or driven, so that the treadmill is moved about the at least two deflection rollers. In particular, one of the deflection rollers is arranged so that it exerts pressure on the roller, in particular on the roller surface, in the processing position. In particular, the one pulley presses the treadmill onto the roller shell surface. Preferably, the role in the processing position by the moving around the at least two pulleys treadmill is driven in rotation and / or set in rotation. For this purpose, the treadmill contacted the roller shell surface, so that the role is set by the circulation of the treadmill in rotation. In particular, a first movable mounting and / or guidance of the roller is implemented by the treadmill pressed onto the roller lateral surface.

A possible alternative constructive implementation of the invention provides that the drive means comprise a circumferential drive belt and at least one deflection pulley, e.g. three deflecting disks, includes. It is preferred that the driver belt is guided in the processing position around the roller, in particular around the roller casing surface, and around the at least one deflection pulley. In particular, the driver belt is driven for movement and / or circulation around the roller and around the at least one deflection pulley. For example, the driver belt rotates the roller and the at least one deflecting disk and thereby rotates the roller. In particular, the role of the rotating belt drive belt is driven in rotation, in particular in rotation displaceable. In particular, an alternative first movable mounting and / or guidance of the roller is implemented by the driver belt.

In a preferred constructive embodiment of the invention, the bearing device comprises a device with a prism-shaped, U-shaped or V-shaped recess for the roller. Preferably, the role in the processing position in the recess, preferably in two points, movably supported and / or guided.

The device of the storage device is in a first possible embodiment as a three-dimensional body, e.g. as a cuboid formed with the recess for the roller. In particular, the roller in the processing position is at least partially mounted on inner surfaces of the recess. Specifically, the roller with the roller shell surface at least partially rolls on the inner surfaces of the recess when it is rotated by the drive means. It is preferred that the inner surfaces are provided with a wear protection layer for protection against wear. In particular, the inner surfaces are provided with a hard material layer, e.g. made of ceramic, carbide or a polycrystalline diamond (PCD) is coated or coated. Preferably, by the recess, in particular by the two inner surfaces, a second and third movable storage and / or management of the role implemented.

In a possible second alternative embodiment of the invention, the device of the bearing device can be designed as a cage disc which can be driven in rotation about a disc axis. Preferably, the cage disc has a plurality of the prism-shaped, U-shaped and / or V-shaped recesses. These form in particular receptacles for the plurality of rollers whose end faces are to receive the curved course. In the recesses, in particular receptacles, the rollers are preferably movably mounted and / or guided in two points. In particular, the rollers are mounted in the receptacles that the two end faces are open and / or accessible for grinding by the grinding wheels. Also in this embodiment, a wear resistance of the recesses can be achieved by suitably applying a hard material layer, e.g. PCD, carbide or ceramic. Specifically, the roller (s), particularly in the machining position, are arranged in the receptacle (s) such that the axis of rotation of the roller (s) extends rectilinearly and / or extends parallel to the disc axis. Alternatively or optionally additionally, the disk axis extends transversely, in particular at right angles, to the first and / or second drive axis of the respective grinding wheel. In this second alternative solution, the rollers are set in rotation in particular by the rotating drive belt for machining the end faces.

It is possible within the scope of the invention that the device comprises a supply and / or discharge device, which transfers the roller into the processing position and / or discharges from it again, in particular after the grinding of the two curved end sides. Optionally, in addition, the device comprises a loading device for equipping the feed and / or discharge device with rollers whose initially planar end faces are still too the curved faces are to be ground.

For example, the supply and / or discharge device may be formed as a conveyor belt. This can transport the rollers of a temporal timing directed after the grinding of the curved end faces to the recess of the three-dimensional body, position them therein for grinding, then transport them away and eject them.

In particular, when using the cage disc as the device of the storage device, this can take over the supply and discharge of the role in a dual function and thereby replace the supply and / or discharge device. For this purpose, the cage disc is preferably drivable and rotatable about the disc axis by a third actuator, in particular by a third motor device. In particular, the cage disc is rotatable about the disc axis in the timed to the grinding timing. In particular, the cage disc is designed to transport the rollers clocked in succession to the processing position. In particular, the cage disc is designed to transport already ground rollers, in particular rollers with the curved end faces, clocked in succession from the processing position and eject.

In a particularly preferred implementation of the invention, the treadmill serves as a drive for the roller when it is mounted in the machining position in the recess of the three-dimensional body. In the event that the driver belt forms the drive for the role, the role in the recording of the cage disc is added. For this purpose, the driver belt extends around the cage disc, around the roller mounted in the receptacle of the cage disc and around the at least one deflection roller.

In a preferred embodiment of the invention, the device comprises a first dressing device for sharpening and profiling the first grinding surface and a second dressing device for sharpening and profiling the second grinding surface. For example, the dressing devices are designed as rotatable and / or rotating dressing rollers with an axially frontal sharpness contour. Optionally, each of the dressing rolls rotates about an axis of rotation that is rectified and / or parallel to the drive axis of the associated grinding wheel. The respective sharpening contour preferably contacts the corresponding grinding surface during and / or during the rotation of the grinding wheel, so that the grinding surface is sharpened and profiled during and / or during the grinding of the corresponding end face. For this purpose, the sharpening contour and the associated grinding surface are preferably arranged in alignment with one another. Due to the use of the dressing devices, dulling of the grinding surfaces can be significantly delayed or even avoided in an advantageous manner.

Another object of the invention is a method for producing a first and second curved end face on the roller for a rolling bearing with the device according to the previous description and / or according to one of claims 1 to 8. In the method, the curved course of the first End face produced by the first grinding wheel simultaneously with the curved course of the second end face by the second grinding wheel, in particular ground. Preferably, the roller and the two grinding wheels rotate simultaneously during the grinding of the end surfaces. In particular, the role in the machining position by the bearing means and by the drive means is movably mounted on three points and / or movable three-point.

• 1 eine Draufsicht von oben auf eine Vorrichtung zur Erzeugung einer ersten und zweiten gekrümmten Stirnfläche an einer Rolle für ein Wälzlager mit einer ersten und zweiten Schleifscheibe;
• 2 eine perspektivische Ansicht der Vorrichtung aus 1 mit den beiden Schleifscheiben, einer Lagerungseinrichtung, einer Antriebseinrichtung und einer Zuführ- und/oder Abführeinrichtung für die Rolle;
• 3 Die Vorrichtung aus 1 mit den beiden Schleifscheiben und mit einer alternativen Lagerungseinrichtung, einer alternativen Antriebseinrichtung und einer alternativen Zuführ- und/oder Abführeinrichtung für die Rolle;
• 4 Die Vorrichtung aus 3 in einer Draufsicht von oben.

Further features, advantages and effects of the invention will become apparent from the following description of preferred embodiments of the invention. Showing:

• 1 a top view of a device for generating a first and second curved end surface on a roller for a rolling bearing with a first and second grinding wheel;
• 2 a perspective view of the device 1 with the two grinding wheels, a storage device, a drive device and a supply and / or discharge device for the role;
• 3 The device off 1 with the two grinding wheels and with an alternative storage device, an alternative drive device and an alternative supply and / or discharge device for the role;
• 4 The device off 3 in a top view from above.

Corresponding or identical parts are each provided with the same reference numerals in the figures.

1 shows a plan view of a first and second grinding wheel 2a . 2 B and to a storage device shown in dashed lines 3 which is part of a device 1 for producing a first and second curved end face 5ak . 5bk on a roll 5 for a rolling bearing.

The first grinding wheel 2a is from a first actor 12a , in particular driven by a first grinding spindle, rotating and the second grinding wheel 2 B is by a second actor 12b , in particular by a second grinding spindle, driven in rotation, so that the first grinding wheel 2a around a first drive axle X1 rotates and the second grinding wheel 2 B about a second drive axle X2 rotates.

The role 5 is made of steel, in particular chromium steel, or of a ceramic material, in particular of silicon nitride. It is as a rolling element 5 designed for integration in a rolling bearing and has two circular, especially before grinding flat faces 5a . 5b ( 2 ) and a roller shell surface 5c on. The roller shell surface 5c is radial to a rotation axis A of the rolling element 5 arranged. The faces 5a . 5b are on both sides of the roller shell surface 5c axially aligned. Each of the faces 5a . 5b has a central recess 5x . 5y around the axis of rotation A , in particular a so-called dome, on.

The role 5 , in particular the rolling elements 5 , is according to 1 designed as a cylindrical roller and has the two end faces 5a . 5b and a cylindrical surface 5c as the roller shell surface 5c on. The role 5 may alternatively be formed as a tapered roller or a barrel roll. Roll-shaped special forms of rolling elements for rolling bearings are possible within the scope of the invention.

A diameter of the rolling element 5 is a maximum of up to 30 millimeters, preferably a maximum of 20 millimeters and in particular a maximum of 10 millimeters. The rolling element 5 is suitable and / or designed for integration and / or use in small and / or miniature roller bearings.

The rolling element 5 is on the storage facility 5 movably mounted. When the rolling element 5 on the storage facility 5 is stored, he is in a processing position P arranged. In the processing position P be from the initially planing faces 5a . 5b ( 2 ) the curved faces 5ak . 5bk through the first and second grinding wheels 2a . 2 B produced, in particular ground. Optionally, in addition to the flat faces 5a . 5b also edge regions of the cylindrical surface 5c honed, attached to the faces 5a . 5b adjoin.

The curved end face 5ak . 5bk are convex. They have a curved, convex course, which is formed by a superposition of a base curve course and a logarithmic curve course. Preferably, the base curve is formed by a circular arc portion whose center is on the axis of rotation A of the rolling element 5 lies. The logarithmic curvature course is in at least one edge section of the respective curved end face 5ak . 5bk arranged.

Due to the aforementioned curvature curves are the curved end face 5ak . 5bk torus-shaped, in particular donut and / or floating tire-like design. The curved course is a torusballiger, in particular donut and / or swimming tire-like course. At least one center of at least one circle forming the torus-shaped course is on a circle around the axis of rotation A of the rolling element 5 arranged.

For grinding the rolling element 5 and for generating the curved end surfaces 5ak . 5bk has the first grinding wheel 2a a first profiled grinding surface 7 and the second grinding wheel 2 B a second profiled grinding surface 8th on. Each of the sanding surfaces 7 . 8th is radially end face and / or shell side to the respective drive axle X1 . X2 arranged. The grinding surfaces 7 . 8th are formed of a cubic crystalline boron nitride (CBN) for grinding steel rollers or a polycrystalline diamond for grinding ceramic rollers. It is also possible that these are grinding surfaces 7 . 8th from other abrasives, such as corundum, sintered corundum or silicon carbide.

The grinding wheels 2a . 2 B and especially the grinding surfaces 7 . 8th are aligned or nearly aligned with the faces 5a . 5b of the rolling element 5 arranged so that the two end faces 5a . 5b of the rolling element 5 can be ground simultaneously and thereby simultaneously obtain the curved course. The first drive axle X the first grinding wheel 2a and the second drive axle X2 the second grinding wheel 2 B run transversely, in particular at right angles, to the axis of rotation A of the rolling element 5 ,

2 shows the device 1 out 1 with the two grinding wheels 2a . 2 B , with two dressing devices 4a . 4b , with the storage device 3 , with a drive device 9 and with a supply and / or discharge device 13 for the rolling element 5 ,

The rolling element to be machined 5 is in or on the storage facility 3 movable, in particular in two points, stored and / or guided. The rolling element 5 thus takes the machining position P one. The storage facility 3 includes a device 10 that has a prismatic, u-shaped or v-shaped recess 6 having. The device 10 is according to 2 as a three-dimensional body 11 , eg as a cuboid, with the recess 6 educated. The rolling element 5 is two-point bearings and / or two-point guided on inner surfaces 6a . 6b the recess 6 on and / or he is on this two-point bearings and / or two-point guided.

The supply and discharge of several rolling elements to be processed one after the other 5 takes place by the supply and / or discharge device 13 , This is as a conveyor belt 14 formed, with which the rolling elements 5 timed to the facility 10 , in particular to the three-dimensional body 11 , transported and positioned on it. As a result, the respective rolling elements 5 in the processing position P for grinding the two end faces 5a . 5b transferred. After grinding the curved course of the faces 5ak . 5bk becomes the corresponding rolling element 5 from the processing position P transported away and ejected.

The drive device 9 is to the rotating drive of the rolling element 5 around its axis of rotation A in the machining position P educated. According to 2 includes the drive device 9 a treadmill 15 and a first and second pulley 16a . 16b of which at least one is driven in rotation. The treadmill 15 is around the pulleys 16a . 16b looped, so it's the two pulleys 16a . 16b can run around.

The first pulley 16a is arranged so that it puts pressure on in the machining position P arranged rolling elements 5 exercises. This will make the treadmill 15 on the cylindrical surface 5c of the rolling element 5 pressed. Through the circulation of the treadmill 15 becomes the rolling element 5 in the recess 6 in rotation about its axis of rotation A added.

The grinding surfaces 7 . 8th the grinding wheels 2a . 2 B grind the still planing faces 5a . 5b so that they get the curved course. During grinding, the rolling elements rotate 5 and the two grinding wheels 2a . 2 B in transverse directions of rotation. Both faces 5a . 5b are ground simultaneously, so that both faces 5a . 5b simultaneously receive the curved course. The wells 5x . 5y in the faces 5a . 5b prevent in the area of the rotation axis A is sanded.

The first and second dressing device 4a . 4b are for sharpening the grinding surfaces 7 . 8th the grinding wheels 2a . 2 B educated. The dressers 4a . 4b are designed as dressing rolls, each of the dressing rolls a sharpening contour 17a . 17b has, with the grinding surfaces 7 . 8th the two grinding wheels 2a . 2 B can be sharpened. This is the first dressing device 4a in alignment with the grinding surface 7 the first grinding wheel 2a arranged and the second dressing device 4b in alignment with the grinding surface 8th the second grinding wheel 2a arranged. Each of the sharpening contours 17a . 17b contacts the respective grinding surfaces 7 . 8th during and / or during the rotation of the grinding wheels 2a . 2 B , This allows the grinding surfaces 7 . 8th sharpened and with the for the generation of curved faces 5ak . 5bk required profile are provided before the curved end faces 5ak . 5bk on the rolling element 5 be generated.

3 shows the device 1 with the two grinding wheels 2a . 2 B and with an alternative storage device 3 , an alternative drive device 9 and an alternative supply and / or discharge device 13 for the rolling element 5 , In 4 is the device 1 out 3 shown in a plan view from above.

The alternative storage facility 9 is as one about a rotation axis Y rotatably driven and / driven cage disc 18 educated. For example, another actuator, in particular a further motor device, serves as drive.

The cage disc 18 has a plurality of shots 19 for a plurality of rolling elements to be machined 5 on. Each of the shots 19 forms the device 10 the storage facility 9 in which the rolling element 5 movable, in particular about its axis of rotation A rotatable, is stored. Through the respective recording 19 as a facility 10 is the rolling element 5 in particular two-point bearings and / or two-point guided.

The cage disc 18 not only serves as an alternative storage facility 9 , It also takes over the function of the feeding and / or discharge device 13 , the rolling elements to be machined 5 feeds and already processed rolling elements 5 dissipates and / or ejects. For this purpose, it rotates timed around the axis of rotation Y and thereby transports those in the recordings 19 recorded rolling elements 5 gradually into the machining position P in which the end faces 5a . 5b to the curved faces 5ak . 5bk be sanded.

The alternative drive device 9 is as a driver belt 20 formed, the order of three pulleys 21a . b . c and around the cylinder surface 5c in the processing position P located rolling elements 5 is guided. At least one of the pulleys 21 . b . c is rotating around deflection axes Z1 . Z2 . Z3 driven. The deflection axes Z1 . Z2 . Z3 run parallel and / or rectified to the axis of rotation Y the cage disc 18 and / or transversely, in particular at right angles, to the first and / or second drive axle X1 . X2 the two grinding wheels 2a . 2 B , These are adjacent to each other and with their grinding surfaces 7 . 8th in alignment with the faces 5a . 5b of the rolling element 5 arranged around the curved faces 5ak . 5bk to grind. During grinding, the rolling elements rotate 5 and the two grinding wheels 2a . 2 B in transverse directions of rotation. Both faces 5a . 5b are ground simultaneously, so that both faces 5a . 5b simultaneously receive the curved course.

Through the rotating driver belt 20 becomes the rolling element 5 in the machining position P around its axis of rotation A set in rotation. As a result, the rolling element rotates 5 when his faces 5a . 5b through the two grinding wheels 2a . 2 B be ground and get the curved course. The driver belt 20 contacts the rolling element 5 in a point, so he through the driver belt 20 one-point-mounted and / or one-point-guided.

By storage in the appropriate receptacle 19 the cage disc 18 and by the concern of the drive belt 20 on the cylinder surface 5c is the rolling element 5 in the machining position P rotatable three-point bearings and / or three-point guided.

LIST OF REFERENCE NUMBERS

1

contraption

2a, 2b

grinding wheels

3

storage facility

4a, 4b

dressing devices

5a, 5b

End faces, plan

5ak, 5bk

End faces, curved

5x, 5y

Depressions, calottes

5c

Roller shell surface, cylindrical surface

6

recess

6a, 6b

inner surfaces

7

first grinding surface

8th

second grinding surface

9

driving means

10

Facility

11

body

12a, 12b

actuators

13

Feeding and / or discharge device

14

conveyor belt

15

treadmill

16a, 16b

guide rollers

17a, 17b

sharpening contours

18

cage washer

19

Recordings

20

driver belt

21a, b, c

guide rollers

A

Rotary axis roller, rolling elements

P

processing position

X1, X2

Drive axles Grinding wheels

Y

Rotation axis cage disc

Z1, 2, 3

Deflection axles Pulleys

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 2253783 [0003]

Claims (10)

Device (1) for producing a first and second curved end face (5ak, 5bk) on a roller (5) for a roller bearing, wherein the device (1) has a bearing device (3) for movably supporting the roller (5) in a machining position (Fig. P), wherein a curved course of the first and second end face (5ak, 5bk) of the roller (5) in the processing position (P) can be generated, wherein the device (1) comprises a first grinding wheel (2a), which around a first Drive shaft (X1) is driven to rotate and wherein the device (1) comprises a second grinding wheel (2b) which is driven to rotate about a second drive axle (X2), characterized in that the first grinding wheel (2a) has a radial to the first drive axle (X1) aligned grinding surface (7) for grinding the curved course of the first end face (5ak) of the roller (5) and that the second grinding device (2b) extends radially to the second drive axis (X2) Having grinding surface (8) for grinding the curved course of the second end face (5 bk) of the roller (5). Device (1) according to Claim 1 , characterized in that the device (1) comprises a drive device (9) for generating a rotation of the roller (5) about an axis of rotation (A) of the roller (5) in the machining position (P). Device (1) according to Claim 2 , characterized in that the axis of rotation (A) of the roller (5) transversely, in particular at right angles, to the first drive axis (X1) of the first grinding wheel (2a) and / or to the second drive axis (X2) of the second grinding wheel (2b) , Device (1) according to one of the preceding claims, characterized in that the roller (5) is guided in three points by the bearing device (3) and by the drive device (9) and / or on the bearing device (3) and on the drive device (9). is three-point bearings. Device (1) according to one of Claims 2 to 4 , characterized in that the drive means (9) comprises a circumferential drive belt (20) or a revolving treadmill (15) which contacts a roller shell surface (5c) of the roller (5), so that the roller (5) drivable and / or in Rotation is offset. Device (1) according to one of the preceding claims, characterized in that the bearing device (3) has a device (10) with a prism-shaped, U-shaped or V-shaped recess (6) for the roller (5), wherein the roller (5) in the recess (6) and / or on inner surfaces (6a, 6b) of the recess (6) is mounted and / or rests on this at least partially. Device (1) one of the preceding claims, characterized in that the first and second curved end face (5ak, 5bk) is convex and / or torusballig and / or that the curved course of each of the end faces (5ak, 5bk) has a convex course and or a torusballiger course, wherein the torusballige course comprises a superposition of a base curve course and a logarithmic curve course. Device (1) according to one of the preceding claims, characterized in that the roller (5) is a cylindrical roller-shaped, barrel-shaped or tapered roller-shaped rolling element (5) for a roller bearing, wherein the roller (5) has a maximum diameter of 30 millimeters, preferably a maximum of 20 Millimeters and in particular has a maximum of 10 millimeters. A method for producing a first and second curved end face (5ak, 5bk) on a roller (5) for a rolling bearing with the device (1) according to one of Claims 1 to 8th , characterized in that the curved course of the first end face (5ak) is generated by the first grinding wheel (2a) simultaneously with the curved course of the second end face (5bk) by the second grinding wheel (2b). Method according to Claim 9 , characterized in that the roller (5) in the processing position (P) by the storage device (3) and by the drive means (9) is movably mounted on three points and / or is movably guided in three points.

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