JPH0464827B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a rolling bearing in which the outer circumferential surface of the outer ring is directly substituted for a roll, such as a back-up roll of a rolling mill or a roll for a leveler; The present invention relates to an apparatus for grinding the outer circumferential surface of an outer ring of a rolling bearing that is fitted into a shaft and has a shaft.

<Prior art> This type of rolling bearing cannot simultaneously transmit rotational force from the shaft to its outer ring, so unless the rotational force is applied by a device that presses the outer ring side end face from outside the bearing and applies rotational force, etc. , the outer ring cannot be ground using a commercially available grinder. Even if the outer ring is ground by applying a rotational force to the outer ring from the outer ring side end face using the above-mentioned device or the like, the outer ring swings around due to the moment force and the grinding accuracy becomes unstable. Therefore, conventionally, a rolling bearing is disassembled into pieces, only the outer ring is taken out, and the outer ring is ground as a single unit, thereby ensuring the accuracy of the outer ring itself.

On the other hand, as shown in Japanese Patent Application Laid-open No. 52-43195,
A mechanism has been proposed in which the outer ring is ground with the shaft still attached.

<Problems to be Solved by the Invention> For example, in the case of a back-up roll for a rolling mill, the outer circumferential surface of the outer ring also serves as the outer circumferential surface of the roll, and the outer circumferential surface is susceptible to scale adhesion, heat and high load conditions during rolling. It becomes rough due to abrasion and biting scratches, etc., which leads to a decline in the quality of rolled products.
It is necessary to repeat this correction grinding of the outer circumferential surface frequently, and for this reason, the above-mentioned grinding means are carried out.
Also proposed.

In order to remove and grind only the outer ring, the rolling bearing must be disassembled one by one, which is very time-consuming, increases the number of grinding setup and processing steps, and requires disassembly, reassembly, and recleaning during this work. There is a problem that it is necessary and very troublesome, and furthermore, it may damage the shaft and outer ring raceway surface during disassembly and reassembly.
It has major disadvantages in that it causes premature bearing life and leads to deterioration of product quality.

Particularly in rolling bearings with shafts in which multiple rolling bearings are mounted on a single shaft, in addition to the man-hours and damage required for disassembly and reassembly, there are also errors in the dimensional accuracy of the outer circumferential surface of the outer ring of each individual rolling bearing. Errors in dimensional accuracy are likely to occur due to assembly or reassembly, which also affects the accuracy of rolled products.

On the other hand, what is described in Japanese Patent Application Laid-Open No. 52-43195 is
This is a bucking bearing (backup roll) grinding device for a Sendzimir rolling mill that uses a rolling bearing with a shaft, and grinds the outer circumferential surface of the outer ring with the shaft still attached. This grinding device has a bucking bearing placed on two drive rolls arranged in parallel, and a brake shoe is used to stop the rotation of the saddle leg located between both drive rolls. While rotating the outer ring, a grindstone is pressed against the outer circumferential surface of the outer ring from diagonally above to perform grinding.

However, in the above grinding equipment, the height from the bottom surface of the saddle leg to the center of the back-up roll is used as the standard for determining the wall thickness of the outer ring. Due to wear and deformation, there is a problem of uneven wall thickness between all the back-up rolls, and it cannot be used for rolling bearings with a shaft, which is an assembly in which the bearing and shaft are integrated without a saddle. There is a problem.

In addition, in the above-mentioned grinding equipment, the bucking bearing is mounted on two driving rolls, and is pressed against the grinding wheel from diagonally above. Therefore, in order to measure the processing accuracy of the bucking bearing, it is necessary to There is also the problem that it requires a lot of man-hours to perform measurements, such as having to remove them.

SUMMARY OF THE INVENTION Therefore, the present invention solves the problems of the prior art, and re-grinds a plurality of bearing outer rings while attached to a shaft without reducing the cylindricity or roundness of the plurality of outer rings. The purpose is to reduce man-hours such as disassembly, reassembly work, and processing man-hours.

<Means for Solving the Problems> In order to achieve the above object, the present invention rotates the outer rings of a plurality of rolling bearings fitted into a shaft individually or together, so that the outer rings of the plurality of rolling bearings are rotated. A device for grinding the outer circumferential surface of an outer ring of a rolling bearing with a shaft, which supports the shaft horizontally from below and is perpendicular to the shaft and inclined so that one side in the horizontal direction is downward. hand,
a first shaft support part capable of moving the shaft in the one direction by its own weight and vertically moving to adjust the axis position of the shaft in the vertical direction; supporting the shaft from the one side; a plurality of shaft support means having a second shaft support part that can move horizontally to adjust the axis position of the shaft in the horizontal direction; and the other side of the outer ring of the rolling bearing opposite to the one side. a transmission wheel that presses against the outer peripheral surface of the roller bearing to rotationally drive the outer ring; a pusher roll that presses against the outer peripheral surface of the other side of the outer ring of the rolling bearing; The outer ring is pressed to one side by the combined force of the pressing force of the pusher roll and the pushing force of the pusher roll, and the outer ring is closely pressed against the inner ring through the rolling elements without any gaps, thereby grinding the outer circumferential surface of the outer ring. It is characterized by being equipped with a grinding wheel.

<Operation> The shaft into which the plurality of rolling bearings are fitted is supported by the first and second shaft support parts of the support means on the lower side and on one side in the horizontal direction and perpendicular to the shaft.
At this time, since the first shaft support part is inclined so that the one side is downward, the shaft is guided by its own weight to the one side along the first shaft support part, hits the second shaft support part, and naturally The axis is positioned quickly and automatically. Furthermore, the first shaft support part and the second shaft support part
By adjusting the shaft support in the vertical or horizontal direction, the axis of the shaft can be placed at a desired position. In this way, since the axis of the shaft can be easily and accurately positioned, there is no need to disassemble the multiple rolling bearings fitted into a single shaft, and it is possible to adjust the eccentricity of multiple outer rings simultaneously or individually without disassembling the multiple rolling bearings fitted into one shaft. This allows accurate grinding without causing any damage.

Further, the outer ring is pressed against the one side with an appropriate force by a transmission wheel and a pusher roll, the other side of the outer ring opposite to the one side is brought into close contact with the inner ring via the rolling elements, the outer ring is rotated, and the outer ring is rotated. Grinding is performed by pressing a grinding wheel toward the outer ring at a location where the rolling elements and the inner ring are in close contact with each other. Therefore, there is no gap at the grinding point of the outer ring, there is almost no rotational runout at the grinding point of the outer ring, and there is no variation in the amount of grinding. Therefore, uneven thickness of the outer ring after grinding is prevented.

Furthermore, by turning the transmission wheel and pusher roll in a direction away from the grinding wheel from the point of contact with the outer ring outer circumferential surface, it is possible to measure the diameter of the outer ring outer circumferential surface with the shafted rolling bearing attached to the device. .

<Examples> The present invention will be described in detail below with reference to illustrated examples.

FIG. 1 is a side view of one embodiment of the present invention, and FIG. 2 is a front view of the above embodiment. In the rolling bearing 10 with a shaft, for example, as shown in the figure, a plurality of inner rings 2 of the rolling bearings are fixed to the shaft 1, or the shaft 1 and the inner rings 2 are integrated, and the raceway surface 2a of the inner ring 2 and the outer ring 3 A rolling bearing 10 with a shaft is provided between the raceway surface 3a and
A large number of rolling elements 4 such as rollers are incorporated in a state in which a radial clearance necessary for rotation is provided.

A slide head 12 is slidably mounted on the grinding machine body 11.
Shaft support portions 15 and 16 as an example of support means for horizontally supporting the shaft 1 of the rolling bearing 10 are shown.
are respectively attached to intermediate shaft positions along the axial direction of the plurality of rolling bearings 10 with shafts.

The shaft support parts 15 and 16 are composed of a pair of a first shaft support part 15 that receives a vertical load and a second shaft support part 16 that receives a horizontal load.
Bearing fittings 15a and 16a having surfaces of curvature slightly larger than the outer peripheral curvature of the shaft 1 are attached to the side surfaces of the shaft 1, so that the shaft 1 can be received at two tangent lines. Further, the first shaft support portion 15 is installed perpendicular to the shaft 1 and tilted downward toward one side in the horizontal direction (right side in FIG. 1), and is attached to the shaft of the rolling bearing 10. 1 is placed on the first shaft support part 15, the rolling bearing 10 with a shaft
is automatically moved in one direction by its own weight to be located at a predetermined centering position. Further, the shaft support parts 15 and 16 are provided with adjustment screws 15b and 16b.
The axial center position of the shaft 1 is moved by adjusting the screws to move the tapered surfaces (not shown) in the shaft support parts 15 and 16, so that the bearing fitting 15a can be finely adjusted in the vertical direction and the bearing fitting 16a can be finely adjusted in the horizontal direction. I try to let them do it.

On the other hand, a transmission wheel 17 whose outer periphery is covered with an elastic material such as rubber is pressed against the front surface of the outer ring outer circumferential surface 3b from above at a slight angle with respect to the top, and is driven by a drive mechanism to be described later. 3 can be rotated.

Further, from diagonally below the front surface of the outer ring 3, a pusher roll 18 covered with an elastic material such as rubber is pressed against the outer ring outer circumferential surface 3b, and is supported via the shaft 1 by the shaft support parts 15 and 16. Transmission wheel 1
7 supports the outer ring 3 which is rotationally driven.

The grinding wheel 19 is supported by the grinding machine main body 11 by a mechanism not shown, is rotated by the drive mechanism of the main body 11, and is rotated between the transmission wheel 17 and the pusher roll 1 by the operating mechanism (not shown) of the main body 11.
8, the outer ring 3 is moved forward and backward toward the front surface of the outer ring 3. In addition, the said front part of the outer ring 3 in this invention refers to the outer ring half part on the grinding wheel 19 side divided by the diameter line which passes the uppermost part and the lowermost part of the outer ring outer peripheral surface 3b.

Thus, as shown in FIG. 3, the outer ring 3 is biased in one direction toward the center of the shaft 1 by the combined force of the pressing forces of the transmission wheel 17 and the pusher roll 18, and the side on which the biasing force acts is biased toward the center of the shaft 1. Then, the raceway surfaces 2a, 3a of the inner ring 2 and the outer ring 3 and the rolling elements 4 come into close contact, and the radial clearance between the raceway surfaces 2a, 3a and the rolling elements 4 becomes zero. Therefore,
At the position where this radial clearance is zero,
The grinding wheel 19 is brought into contact with the front surface of the outer ring outer circumferential surface 3b to perform the required re-grinding process. Therefore, there is almost no rotational runout at the grinding point of the outer ring 3, and there is no variation in the amount of grinding. Therefore, uneven thickness does not occur after the outer ring 3 is ground.

The transmission wheel 17 is rotationally driven by a continuously variable speed electric motor 20 via a V pulley 26, a V belt 27, etc., and is supported by a bearing (not shown) on a transmission wheel bracket 29 rotatably attached to an intermediate shaft 28. . The intermediate shaft 28 is pivotally mounted on a bearing part 31 arranged at the upper part of the slide head 12, and the transmission wheel 17 and the transmission wheel bracket 29 are rotated around the intermediate shaft 28 by operating the lever 24 by the hydraulic cylinder 22. It's becoming possible.

The pusher roll 18 has its shaft portion 32 rotatably supported by a bearing (not shown) mounted on the slide head 12. Pushya roll 1
8 and pusher roll bracket 30 can be rotated around an intermediate shaft 33 by turning a lever 25 using a hydraulic cylinder 23.

In this way, the transmission wheel 17 and the pusher roll 1
8 can pivot around the shafts 28 and 33, so the dimensions of the outer peripheral surface of the outer ring 3 can be easily measured.

The slide head 12 is slidably mounted on the grinding machine body 11 by means of a guide portion 34, and is fixed at a predetermined position by a fixing bolt 35.

The slide head 12 has a guide portion 34 and fixing bolt 35 of a versatile structure so that it can be mounted on a general grinding machine.

This grinding device has the above configuration,
The shaft 1 of the rolling bearing 10 is supported by first and second shaft support parts 15 and 16. At this time, the first
Since the shaft support part 15 is inclined so that the above-mentioned one side is downward, the shaft 1 is moved by its own weight to the first shaft support part 1.
The shaft 1 is guided along the bearing fitting 15a of No. 5 to the second shaft support portion 16, and the shaft 1 is positioned naturally and automatically. Furthermore, the bearing fittings 15a of the first and second shaft support parts 15 and 16,
By adjusting 16a in the vertical and horizontal directions, the axis of the shaft 1 is placed at a desired position. In this way, since the axis of the shaft 1 can be easily and accurately positioned, a plurality of outer rings 3 can be installed simultaneously or individually without disassembling the plurality of rolling bearings 10 fitted into one shaft 1. It is possible to grind accurately without causing any eccentricity.

Furthermore, the transmission wheel 17 and the pusher roll 1
8 to press the outer ring 3 against the one side with an appropriate force to bring the other side of the outer ring 3 opposite to the one side (the left side in FIG. 1) into close contact with the inner ring 2 via the rolling elements 4, and then Grinding is performed by rotating the outer ring 3 with the transmission wheel 17 and pressing the grinding wheel 19 toward the one side of the outer ring 3 at a location on the other side where the outer ring 3, rolling elements 4, inner ring 2, and shaft 1 are in close contact with each other. Therefore, there is no gap at the grinding point of the outer ring 3, there is almost no rotational runout at the grinding point of the outer ring 3, and there is no variation in the amount of grinding. Therefore, uneven thickness of the outer ring 3 after grinding is prevented.

<Effect> As is clear from the above description, according to the present invention, the first shaft support part is inclined so that the one side is downward and is adjustable in the vertical direction, and the first shaft support part is adjustable in the horizontal direction. Since the second shaft support part is provided,
A shaft fitted with a plurality of rolling bearings can be easily positioned by its own weight, and centering can be adjusted. Therefore, in correction grinding of multiple outer rings of a rolling bearing with a shaft,
The man-hours required for disassembling and reassembling each bearing can be omitted, and economic efficiency is improved by significantly reducing the number of grinding setup and cleaning man-hours as well as machining man-hours.
There are no dents, damage, etc. that occur during disassembly and assembly, and the bearing performance before re-grinding is maintained and the quality of rolled products is improved.

According to the present invention, the other side of the outer ring is pressed toward the one side by the transmission wheel and the pusher roll, and the grinding wheel is disposed between the transmission wheel and the pusher roll, and the grinding wheel is connected to the rolling element of the outer ring. Since the grinding is carried out in close contact with the inner ring without any gaps, there is almost no rotational runout at the grinding point of the outer ring, and there is no variation in the amount of grinding, thus preventing uneven thickness of the outer ring after grinding. can.

Furthermore, if the transmission wheel and the pusher roll are made rotatable, the dimension of the outer circumferential surface of the outer ring can be easily measured while the rolling bearing with shaft is attached to the device.

[Brief explanation of the drawing]

FIG. 1 is a side view of the embodiment, FIG. 2 is a front view, and FIG. 3 is an enlarged side view of main parts for explanation. DESCRIPTION OF SYMBOLS 1... Shaft, 3... Outer ring, 10... Rolling bearing with shaft, 15, 16... Supporting means, 17... Transmission wheel, 18
...Putshya roll, 19...grinding wheel.

Claims (1)

[Claims] 1. The outer circumferential surface of the outer ring of a rolling bearing with a shaft, which grinds the outer circumferential surface of the outer ring of the plurality of rolling bearings by rotating the outer rings of the plurality of rolling bearings fitted on the shaft individually or together. A grinding device, wherein the shaft is supported horizontally from below, and tilted so that one side in the horizontal direction perpendicular to the shaft is downward, and the shaft is moved to the one side by its own weight, a first shaft support part that can move vertically to adjust the axial center position of the shaft; and a first shaft support part that supports the shaft from the one side and moves horizontally to adjust the axial center position of the shaft. a plurality of shaft support means having a second shaft support portion which can be adjusted in the horizontal direction; and a plurality of shaft support means having a second shaft support portion which can be adjusted in the horizontal direction; a pusher roll that presses against the outer circumferential surface of the other side of the outer ring of the rolling bearing; and a pusher roll disposed between the transmitter and the pusher roll, the combined force of the pressing force of the transmission wheel and the pushing force of the pusher roll. and a grinding wheel that grinds the outer circumferential surface of the outer ring by closely contacting the inner ring via the rolling elements of the outer ring pressed to one side by the inner ring and pressing against the part without a gap. A device for grinding the outer circumferential surface of the outer ring of a rolling bearing with a shaft. 2. The transmission wheel and the pusher roll are moved in a direction away from the grinding wheel from the point of contact with the outer circumferential surface of the outer ring so that the diameter of the outer circumferential surface of the outer ring can be measured with the rolling bearing attached to the shaft. An apparatus for grinding an outer circumferential surface of an outer ring of a rolling bearing with a shaft according to claim 1, which is movable in rotation. 3. An apparatus for grinding the outer circumferential surface of an outer ring of a rolling bearing with a shaft according to claim 1 or 2, which is portable and can be mounted on an ordinary grinding machine.