JPH06344013A - Device for grinding roll surface - Google Patents

Abstract

PURPOSE:To grind a roll surface while collecting chips, fallen abrasive grains, etc., which are generated. CONSTITUTION:A grinding wheel 2 in a head 11 is brought into contact with a roll 1 from an opening part 11a, the lubrication, cooling and washing of a grinding part 101 are executed and also a fluid-flow curtain for partitioning the inside and outside of the head 11 is formed by jetting water toward the grinding part 101 from the tip port 12a of nozzles 12 which are provided in the peripheral part of the head 11. In this way, the chips are removed from the roll 1 and the chips and falling abrasive grains which are collected into the hood 13 in the head 11 are not allowed to leak to the outside of the head 11. The chips and falling abrasive grains around the grinding part 101 are sent to a recovering device together with water by the rotation of a fan 15 which is provided along the outer periphery of the grinding wheel 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for grinding a roll provided in the apparatus while the roll is provided in the apparatus, and is particularly convenient when used as a rolling roll of a cold strip rolling mill. It is something.

[0002]

2. Description of the Related Art When a strip is rolled by a rolling mill, a roll portion through which an edge portion of the strip passes is extremely worn, so that the roll is locally worn and a wider strip is used. It causes inconvenience when rolling. For this reason, rolls are being recombined by removing the rolls from the rolling mill and recombining with new rolls.

Used rolls (hereinafter referred to as old rolls) taken out from the rolling mill by recombining the rolls are conveyed to a roll shop, chocks are taken out, conveyed to and attached to a grinder, grinding, cleaning, and to a roll shop. By the procedures such as the transportation of the rolls, the installation and inspection of the chocks, and the transport to the roll rearrangement position near the rolling line,
It is newly incorporated into the rolling mill as a new roll. For this reason, many rolls must be prepared because the old roll is removed from the rolling mill and the new roll is incorporated at the same time. Further, since one rolling line has to change the rolls several times a day, it is a great obstacle to productivity improvement.

From the above, if the rolls incorporated in the rolling mill can be ground with the rolls incorporated in the rolling mill, work such as roll reassembling becomes unnecessary, productivity is improved, and the required number of rolls can be reduced. Such a method
It has already been put to practical use in hot strip rolling mills.

[0005]

However, in order to apply such a method to a cold strip rolling mill, in order to apply the cutting powder of the roll or the falling abrasive grains of the grindstone generated during grinding to the surface of the roll or the strip. It is necessary to prevent the surface of the roll or the strip from being scratched, or being embedded in the strip and deteriorating the surface properties of the strip from adhering to the surface. Further, it is necessary to prevent the cutting powder and the falling abrasive grains from scattering from the vicinity of the grinding portion to the outside and also to prevent them from mixing into the rolling oil.

As a method of satisfying such a point, it is possible to grind while surrounding the grindstone with a solid seal such as a rubber seal or a thin blade. That is, as shown in FIG. 8, a solid seal is arranged around the opening of the head 21 that comes into contact with the surface of the roll 1, and the grinding fluid sprayed from the nozzle 22 toward the grinding portion, the cutting powder, or the falling grind. This is to prevent the grinding fluid containing the particles after the completion of grinding from leaking to the outside. At this time, since the solid seal has to be pressed against the roll 1 or the gap e between the solid seal and the roll 1 must be made extremely small, the solid seal of the corresponding portion is almost rolled so as to seal the circumferential portion of the roll 1. It must be formed along a curvature of 1.

However, the roll 1 has a large roll diameter D ₁ when it is new, but when rolling and grinding are repeated,
The diameter becomes smaller. Therefore, if a solid seal is formed along the roll diameter D ₁ when the roll is new, as shown in FIG. 9, when the roll 1 has a small roll diameter D ₂ , the grindstone 2 rolls. 1 is in contact with the gap e
Becomes too big and the solid seal fails. Further, the head 21 having the solid seal attached thereto must be retracted away from the surface of the roll 1 so that the grindstone 2 always contacts the roll 1 as the grindstone 2 wears. Further, if the cutting powder or the fallen abrasive grains are caught in the solid seal, the solid seal may be damaged or the contact portion of the roll 1 may be damaged.

Therefore, it is very difficult to grind with the rolls incorporated in the cold rolling mill. From this, the present invention, by grinding while the roll is attached to the rolling mill, the cutting powder of the roll and the falling abrasive grains of the whetstone that are generated do not remain attached to the roll or the strip plate and are scattered to the outside. The purpose is to prevent it from mixing with rolling oil.

[0009]

In order to solve the above-mentioned problems, the present invention provides a grindstone for grinding the surface of a roll, a rotary shaft to which the grindstone is attached on one end side, and a rotary shaft which is rotatable. A main body supporting the shaft, a rotating means for rotating the grindstone, a head provided on the main body so as to surround the grindstone, and having an opening formed on the tip side so that the grindstone and the roll come into contact with each other; A nozzle that is provided along the periphery of the opening of the head and that ejects liquid so as to form a liquid curtain toward the grinding portion where the whetstone and the roll contact each other, and is connected to this nozzle The roll surface grinding device is configured by including the liquid supply means for supplying the liquid to the nozzle.

Further, the roll surface grinding apparatus having the above-mentioned structure is provided with a liquid discharging means for discharging the liquid in the head to the outside.

[0011]

In the roll surface grinding device having the above-mentioned structure,
When the liquid is ejected from the nozzle by the liquid supply means, the liquid is sent to the grinding section and a liquid flow curtain is formed between the nozzle and the grinding section, so that the periphery of the grinding section is lubricated and cooled, and at the same time the roll is rolled. The grinding powder generated by the surface grinding is removed from the roll by the liquid flow, and the removed cutting powder and the removed abrasive grains from the grindstone are collected inside the head by the liquid flow curtain so as not to leak to the roll side.

Further, when the cutting powder and the falling abrasive particles collected inside the head are discharged to the outside of the head together with the liquid by the liquid discharging means, the liquid and the cutting powder fall off around the grinding portion. Since it does not stay, the shielding effect of the liquid flow curtain is high.

[0013]

EXAMPLE An example in which an embodiment of a roll surface grinding apparatus according to the present invention is applied to a cold strip rolling mill will be described with reference to FIGS. It is to be noted that FIG.
1 shows an enlarged enlarged view of its main part, and FIG.
The III-III line arrow cross section of is shown.

In these drawings, reference numeral 2 denotes a cylindrical grindstone which comes into contact with the surface of the cylindrical roll 1, and the grindstone 2 is attached to the tip end side of the rotary shaft 3.

A base end side of the rotary shaft 3 is connected to a motor 5 provided in a grinder case 4 which constitutes a main body. The portion of the rotary shaft 3 between the grindstone 2 and the motor 5 is
It is rotatably supported by a bearing 6 provided on the tip side of the grinder case 4.

That is, when the motor 5 is driven, the rotating shaft 3
The grindstone 2 is rotated through this to grind the roll 1.

FIG. 1 which is the end side of the grinder case 4.
One end side of the rod 7 is connected to the inside and the right side. The other end of the rod 7 is connected to a piston in the hydraulic cylinder 8. The hydraulic cylinder 8 is a cylinder trunnion 9
It is swingably supported by. Grinder case 4
A slide mechanism unit 10 is provided on the outer periphery of the slide mechanism unit 10 to move the grinder case 4 in a direction parallel to the axis of the rotary shaft 3.

That is, by adjusting the hydraulic cylinder 8 and the cylinder trunnion 9 and the like, the grindstone 2 is brought into contact with the target surface position of the roll 1.

In the figure, which is the tip side of the grinder case 4,
On the left side, a cylindrical head 11 that surrounds the grindstone 2 is provided coaxially with the rotating shaft 3. A circular opening 11a is formed on the left side of the head 11 in the drawing on the left side in the drawing so as to bring the roll 1 and the grindstone 2 into contact with each other, so as to be coaxial with the rotary shaft 3.

At the peripheral edge of the opening 11a of the head 11, there is provided a nozzle 12 having an annular tip end 12a formed along the peripheral edge, and the tip end 12a of the nozzle 12 is the roll 1. Grinding part 1 in contact with grindstone 2
The direction is 01. The nozzle 12 is connected via a head 11 to a water supply device (not shown) which is a liquid supply means for supplying water, which is a liquid for lubrication, cooling, and cleaning during grinding, to the nozzle 12.

That is, when the water supplied from the water supply device is jetted from the tip end port 12a of the nozzle 12, the grinding section 10
1 lubrication, cooling, and cleaning of the periphery of the head 11
Liquid curtain 10 to shield inside and outside
2 is formed so that the cutting powder and the falling abrasive grains generated from the grinding portion 101 do not leak to the outside of the head 11.

Inside the head 11, there is provided a cylindrical hood 13 which collects cutting powder, falling abrasive grains and the like together with water.
It is installed coaxially with. The hood 13 has a pipe 1 for communicating the outside of the head 11 with the inside of the hood 13.
3a is connected. On the outside of the head 11 of the pipe 13a, a collecting device (not shown) that collects cutting powder, falling abrasive grains and the like together with water is connected. A seal 14 is fitted in the grinder case 4 portion of the rotary shaft 3 between the grindstone 2 and the bearing 6 so as to prevent water from flowing into the grinder case 4.

Along the outer circumference of the grindstone 2, a blade 15 is provided between the grindstone 2 and the rotary shaft 3 for sending cutting powder, falling abrasive grains and the like generated from the grinding section 101 together with water to a collecting device. It is provided so as to stand integrally with the washer against the outer circumference of the grindstone 2.

That is, the water that has lubricated, cooled, and washed the grinding portion 101 is sent to the collecting device by the rotation of the blades 15 so as not to stay around the grinding portion 101 together with the cutting powder and the falling abrasive grains.

In order to grind the surface of the roll with such a roll surface grinding device, the hydraulic cylinder 8 and the cylinder trunnion 9 are adjusted so that the roll 1 for the grindstone 2 is the target.
Then, the motor 5 is driven and the grindstone 2 is rotated.

When water is supplied from the water supply device to the nozzle 12 and sprayed from the tip end port 12a toward the grinding portion 101, the periphery of the grinding portion 101 is lubricated and cooled, and cutting powder, falling abrasive grains, etc. are rolled. To the inside of the head 11.
Due to the liquid flow curtain 102, the cutting powder, the falling abrasive grains, and the like do not leak from the inside of the head 11 to the roll 1 side.

The water, which has been lubricated, cooled, and washed in the grinding section 101, is sent to the collecting device by the rotation of the blades 15 along with the cutting powder and the falling abrasive grains. As a result, water is efficiently collected by the collecting device and does not stay around the grinding unit 101, so that the shielding effect of the liquid flow curtain 102 is enhanced.

Therefore, even if the housing of the cold strip rolling mill is ground with the rolls provided, the cutting powder and the falling abrasive grains that are generated do not adhere to the strip, and the cutting powder and the falling abrasive grains are not attached. It is possible to recover the oil without mixing it with the rolling oil.

In this embodiment, water is used as the liquid, but the liquid is not limited to this, and for example, an abrasive or rolling oil may be used. In the present embodiment, the motor 5 is driven to rotate the grindstone 2, but the grindstone may be rotated by rotating the roll without using the motor, for example. In this embodiment, the grindstone 2
Although the blades 15 are provided along the outer circumference of, the blades may be provided on the rotating shaft, for example. Further, in this embodiment, the blade 15 is used as the liquid discharging means, but the liquid inside the head may be sucked and discharged by a suction pump, for example.

In this embodiment, as shown in FIG. 4, the nozzle 12 is provided along the periphery of the opening 11a of the cylindrical head 11.
The nozzle 22 is provided along the square tube-shaped head 21 as shown in FIG. 5, or the nozzle 22 is provided with a grinding fluid flow corresponding to the rotation direction of the grindstone as shown in FIG. The jet directing plate 33 may be provided inside the nozzle 12, or the nozzle 42 may be provided only in a predetermined facing direction as shown in FIG.

[0031]

As described above, in the roll surface grinding apparatus according to the present invention, the liquid is jetted from the nozzle to form the liquid flow curtain between the nozzle and the grinding part while sending the liquid to the grinding part to generate the liquid flow curtain. The cutting powder to be removed is removed by the liquid flow, and the cutting powder and falling abrasive grains are collected inside the head by the liquid flow curtain so as not to leak to the roll side. Even if grinding is performed, cutting powder, falling abrasive grains, and the like do not adhere to the rolls or strips and are not mixed in the rolling oil. For this reason, the work of reassembling the rolls is not required, and the labor can be largely saved and the productivity is greatly improved.

Further, the shavings and fallen abrasive grains collected inside the head are discharged together with the liquid to the outside of the head by the liquid discharging means so as not to stay around the grinding portion, thereby enhancing the shielding effect of the liquid flow curtain. Therefore, the effect described above can be maintained without deteriorating.

Furthermore, since the liquid flow curtain is used for shielding, even if there is a gap between the head and the roll,
There is no liquid leakage that occurs when a solid seal is used and no cutting powder or falling abrasive grains are caught, and there is no need to finely adjust the head according to the roll diameter.

[Brief description of drawings]

FIG. 1 is a schematic structural diagram of an embodiment of a roll surface grinding apparatus according to the present invention.

FIG. 2 is an enlarged enlarged view of the main part.

3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a schematic cross-sectional view taken along the line IV-IV of FIG.

FIG. 5 is a schematic cross-sectional view corresponding to FIG. 4 in the case of another first embodiment of the roll surface grinding device according to the present invention.

FIG. 6 is a schematic cross-sectional view corresponding to FIG. 4 in the case of another second embodiment of the roll surface grinding device according to the present invention.

FIG. 7 is a schematic cross-sectional view corresponding to FIG. 4 in the case of another third embodiment of the roll surface grinding device according to the present invention.

FIG. 8 is a schematic structural diagram of a roll surface grinding apparatus using a solid seal.

FIG. 9 is a schematic view when the diameter of the roll is reduced.

[Explanation of symbols]

 1 roll 2 grindstone 3 rotating shaft 4 grinder case 5 motor 6 bearing 11 head 11a opening 12 nozzle 12a tip opening 13 hood 15 blade 101 grinding part 102 liquid curtain

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Egawa 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Research Institute (72) Inventor Yukio Hisa, 4th Kannon Shinmachi, Nishi-ku, Hiroshima 6-22 No. 22 Hiroshima Research Laboratory, Mitsubishi Heavy Industries, Ltd.

Claims (2)

[Claims] 1. A grindstone for grinding the surface of a roll, a rotary shaft to which the grindstone is attached at one end side, a main body for rotatably supporting the rotary shaft, a rotating means for rotating the grindstone, A head provided on the main body so as to surround a grindstone and having an opening formed on the tip end side so that the grindstone and the roll come into contact with each other, and the grindstone provided along the peripheral edge of the opening of the head. A nozzle for injecting a liquid so as to form a liquid curtain toward a grinding portion in contact with the roll; and a liquid supply unit connected to the nozzle and supplying the liquid to the nozzle. And roll surface grinding equipment. 2. A roll surface grinding apparatus according to claim 1, further comprising liquid discharging means for discharging the liquid in the head to the outside.