Manufacturing apparatus for producing a curved contour on at least one end face of a roll and method for producing a curved contour on the at least one end face with the manufacturing apparatus

Abstract

A manufacturing apparatus for producing a curved contour on an end face of a roll includes a grinding device and a holding device, linearly movable relative to the grinding device. The grinding device is for grinding the curved contour on the end face. The holding device is for holding the roll between the holding device and the grinding device. A method for producing the curved contour on the end face using the manufacturing apparatus is also disclosed. The method includes driving the holding device to move in a linear fashion relative to the grinding device.

Claims

1. A manufacturing apparatus for producing a curved contour on an end face of a roll, wherein the roll has a lateral surface extending radially around an axis of rotation of the roll, the manufacturing apparatus comprising: a grinding device for grinding the curved contour on the end face; and a holding device, linearly movable relative to the grinding device, for holding the roll between the holding device and the grinding device; wherein the grinding device includes a grinding channel and a channel wall, the grinding channel including an upper grinding profile configured to produce a first curved contour on the end face of the roll and a lower grinding profile configured to produce a second curved contour on a further end face of the roll; wherein the channel wall extends from the upper grinding profile to the lower grinding profile; wherein the grinding device is designed such that the axis of rotation of the roll extends parallel to the channel wall; wherein the roll can be driven by a linear motion of the holding device relative to the grinding device to roll on the grinding device and to pass through the grinding channel in a pass direction; and wherein the pass direction is orthogonal to the axis of rotation.

2. The manufacturing apparatus of claim 1, wherein the grinding device is arranged in a fixed location.

3. The manufacturing apparatus of claim 1, wherein the roll can be arranged in positive engagement between the grinding device and the holding device.

4. The manufacturing apparatus of claim 1 further comprising; the roll arranged in positive engagement between the grinding device and the holding device.

5. The manufacturing apparatus of claim 1, wherein the roll can be arranged in the grinding channel such that the lateral surface of the roll rests against the holding device; the end face contacts the upper grinding profile; and the further end face contacts the lower grinding profile.

6. The manufacturing apparatus of claim 1, wherein the grinding channel is tapered in the pass direction; or narrows in the pass direction.

7. A method for producing a curved contour on an end face of a roll using the manufacturing apparatus of claim 1, comprising driving the holding device to move in a linear fashion relative to the grinding device.

8. A method for producing a curved contour on an end face of a roll using the manufacturing apparatus of claim 1, comprising driving the holding device to move in a linear fashion relative to the grinding device.

9. The method of claim 8, wherein the roll is arranged in the grinding channel such that: the end face contacts the upper grinding profile; the further end face contacts the lower grinding profile; and the holding device rests against or presses against the lateral surface and the roll is set in rotation by the linear motion of the holding device and passes through the grinding channel in the pass direction.

10. The method of claim 9, wherein the first curved contour is ground by the upper grinding profile, and the second curved contour is ground by the lower grinding profile while the roll is passing in rotation through the grinding channel.

11. The manufacturing apparatus of claim 1, wherein the end face is spaced from the further end face along the axis of rotation.

12. The manufacturing apparatus of claim 11, wherein the lateral surface extends from the end face to the further end face.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further features, advantages and effects of the disclosure will become apparent from the following description of preferred illustrative embodiments. In the drawings:

(2) FIG. 1 shows a manufacturing apparatus for producing a curved contour on at least one end face of a roll with a grinding device and with a holding device;

(3) FIG. 2 shows a plan view and side view of a grinding channel, which is inserted into the grinding device;

(4) FIG. 3 shows the grinding channel from FIG. 2, wherein the roll is arranged in the grinding channel; and

(5) FIG. 4 shows a plan view of a channel entry of the grinding channel and a side view of the channel entry.

(6) In the figures, corresponding or identical parts are in each case provided with the same reference signs.

DETAILED DESCRIPTION

(7) FIG. 1 shows a manufacturing apparatus 1, which is designed for the production, preferably for the cost-effective mass production, of a curved contour on at least one end face 3a, 3b of a roll 2. The manufacturing apparatus 1 comprises a grinding device 4 and a holding device 5. The roll 2 is arranged between the grinding device 4 and the holding device 5, in particular held in positive engagement between them, in particular clamped.

(8) The roll 2 is designed as a rolling element, in particular as a cylindrical roller, as a needle roller or barrel roller, for a rolling bearing. It has a diameter of, for example, 5 millimeters, preferably of 6 millimeters, and/or of up to 8 millimeters. A length of the roll 2 is preferably at least 4 millimeters, in particular at least 20 millimeters, more specifically at least 40 millimeters and/or a maximum of 70 millimeters.

(9) As shown more precisely in FIG. 3, the roll 2 has a lateral surface 3c, which is arranged radially with respect to the axis of rotation X of the roll 2. The roll 2 comprises a first and a second end face 3a, 3b, which are arranged axially opposite one another.

(10) As shown in FIG. 1, the grinding device 4 and the holding device 5 of the manufacturing apparatus 1 are designed as cuboidal steel jaws. They can be integrated as a grinding machine into a rolling machine. It is also possible to use some other machine tool. The grinding device 4 is fixed in a fixed location and immovably in the grinding machine. The holding device 5 can be moved in a linear fashion relative to the grinding device 4. For this purpose, the manufacturing apparatus 1 comprises an actuator (not shown), e.g. a linear motor, which can move the holding device 5 in a linear fashion.

(11) In a linear motion L of the holding device 5, it moves at a distance from the grinding device 4 and in the same orientation as and/or parallel to the grinding device 4.

(12) The grinding device 4 has a grinding channel 6, which comprises a channel opening, a channel wall 7, an upper grinding profile 8a and a lower grinding profile 8b. The upper and lower grinding profiles 8a, 8b extend along the channel opening, which lies opposite the channel wall 7. The upper grinding profile 8a is designed to grind the first end face 3a of the roll 2, thus giving rise on said end face to the curved, in particular crowned, contour. The lower grinding profile 8b is designed to grind the second end face 3b of the roll 2, thus in this case too giving rise on said end face to the curved, in particular crowned, contour.

(13) The holding device 5 has a holding surface 9 for holding the roll 2 in the grinding channel 6. The holding surface 9 is optionally provided with a coating which increases the friction coefficient, thus ensuring reliable retention of the roll 2 between the grinding device 4 and the holding device 5 and enabling slipping of the roll 2 to be avoided.

(14) FIG. 2 shows a plan view and a side view of the grinding channel 6 of the grinding device 4. FIG. 3 shows a detailed illustration of the roll 2, a section of which is arranged in the grinding channel 6.

(15) The roll 2 is arranged partially in the grinding channel 6 in such a way that the axis of rotation X is perpendicular, normal or vertical and extends in the same orientation as the channel wall 7. By means of the two end faces 3a, 3b, the roll 2 makes contact with the grinding profiles 8a, 8b. By means of the holding device 5 shown in FIG. 1, the roll 2 is held in this position, in particular pressed into the grinding channel 2.

(16) Activated by the actuator, the holding device 5 performs the linear motion L. The roll 2 is thereby set in rotation about the axis of rotation X in a pass direction D, with the result that the roll 2 moves through the grinding channel 6 in the pass direction D. In this case or during this process, the curved contour is ground on the first end face 3a of the roll 2 by the upper grinding profile 8a, and the curved contour is ground on the second end face 3b by the lower grinding profile 8b.

(17) FIG. 4 shows a plan view of a channel entry 10 of the grinding channel 6 and a side view of the channel entry 10. The roll 2 is inserted into the grinding channel 6 through the channel entry 10, thus enabling the end faces 3a, 3b then to be provided with the curved contours by means of the rotary motion in the pass direction D. For insertion of the roll 2 into the grinding channel 6, the manufacturing apparatus 1 (FIG. 1) has a feed device (not shown), which is designed as a robot arm and/or a gripper, for example. After the complete traversal of the grinding channel 6, the roll 2 is ejected at a channel end 12 and is carried away by a conveyor belt, for example.

(18) The channel entry 10 has a greater width W than the grinding channel 6 further along in the pass direction D. In particular, the grinding channel 6 tapers or narrows in the pass direction D. This is necessary since the roll 2 has a greater height H in the axial direction upon insertion into the channel entry 10 and before grinding than during or after grinding in the grinding channel 6. In particular, the height H (FIG. 3) of the roll 2 decreases in and/or during the grinding of the curved contour on the end faces 3a, 3b, and therefore the grinding channel 6 is adapted thereto by means of the taper and/or narrowing.

(19) The upper and lower grinding profiles 8a, 8b are provided with an abrasion-resistant coating, e.g. composed of boron nitrite (CBN), thus enabling the service life to be increased and blunting to be delayed. The grinding profiles 8a, 8b extend transversely, at an angle or on a radius or radius contour with respect to the channel wall 7 (see also FIG. 3). In particular, the grinding profiles 8a, 8b are formed by a step and/or a radius or radius contour 11, which is/are configured in such a way that the curved contour of the end faces 3a, 3b can be ground.

(20) By means of the manufacturing apparatus 1 shown in FIG. 1, it is possible to increase a production rate as compared with conventional manufacturing apparatuses for grinding curved end faces on rolling elements. It is thereby possible to produce the rolls 2 with the curved end faces 3a, 3b in a cost-effective manner.

REFERENCE NUMERALS

(21) 1 manufacturing apparatus 2 roll 3a first end face 3b second end face 3c lateral surface 4 grinding device 5 holding device 6 grinding channel 7 channel wall 8a upper grinding profile 8b lower grinding profile 9 holding surface 10 channel entry 11 step and/or radius D pass direction H height L linear motion W width X axis of rotation