JP2000176516A - Grinding device for rolling roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a device which uses the rotation of rolling rolls as a driving source for the rotation of grinding wheels and traversing movement in the axial direction of rolls, with the pattern of ground marks which is out of the question, which is applicable to online grinding in a hot rolling mill, compact, easily maintained and easily provided to an existing rolling mill at low cost. SOLUTION: This device consists of a driven roll 2 which is rotated by being brought into contact with the surface to be ground of the rolling rolls 1 in rolling, grinding wheel 3 which is connected so as to link with the driven roll 2 at different peripheral speed, and a holding and pressing mechanism for holding the driven roll 2 and grinding wheel 3 and for pressing against the surface to be ground. Reciprocatively traversing motion in the axial direction of the rolling rolls is enabled by inclining the axis of rotation of the driven roll 2 against the axial direction of the roll. In this way, the conservation of energy and reduction of a cost are achieved and also by applying to on-line grinding, the frequency of roll changing is reduced and the productivity of a rolling mill is improved.

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 of steel or the like, and more particularly to an apparatus capable of performing on-line grinding of a roll incorporated in a rolling mill.

[0002]

2. Description of the Related Art In a rolling mill for a steel material or the like, a rolling roll is worn by rolling, or a heat crack or a roll surface is roughened. The removed roll is ground at the roll shop and reused. Particularly, in hot rolling mills, the rolling rolls reach the service limit early, so that the frequency of changing rolls becomes high, which is a major factor in reducing the operation rate of the rolling mill. For this reason, in the hot rolling mill, an online grinding device that can perform grinding in a state where the rolls are incorporated in the rolling mill is also partially used.

[0003] However, the conventional online grinding apparatus requires a drive source such as a hydraulic motor or an electric motor for the rotation of the grindstone and the traverse movement in the roll axis direction. For this reason, the scale of the apparatus is large and the cost is high. If the apparatus is newly installed in a rolling mill, the remodeling of the rolling mill and its surroundings becomes large. Particularly, in a hot rolling mill, the use atmosphere is at a high temperature and the water is subjected to bad conditions, so that a load is applied for maintenance of a driving source.

[0004] As a grinding means using the rotation of the rolling roll as a rotation drive source of the grinding wheel, there is also a method of pressing a rotating grindstone whose grinding surface is a part of a cone against the rolling roll, and grinding by a peripheral speed difference of the grinding wheel grinding surface. Although it is known, since the rotation axis of the grindstone and the rotation axis of the rolling roll are almost perpendicular, there is a problem that a round grinding mark remains as a pattern on the surface of the rolling roll.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention has been developed without using a drive source such as a hydraulic motor or an electric motor.
The rotation of the rolling roll is used as the drive source for the rotation of the grindstone and the traverse movement in the roll axis direction, and the pattern of the grinding marks does not matter,
An object of the present invention is to provide a rolling roll grinding apparatus which can be applied to online grinding of a hot rolling mill, is compact, easy to maintain, low-cost, and easy to install on an existing rolling mill.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a driven roll which rotates in contact with a surface to be ground of a rotating rolling roll, and which is interlocked with the driven roll at a different peripheral speed. And a holding press mechanism for holding the driven wheel and the rotating grindstone and pressing the grindstone against the surface to be ground.

A traverser and a slider, wherein the holding and pressing mechanism can reciprocate in the axial direction of the rolling roll;
A holder that is pivotally supported so as to be tiltable with respect to the slider,
At both ends of the reciprocating range of the traverser, strikers to which the traverser abuts are fixed, the slider is mounted on the traverser so as to reciprocate in the direction of the rolling roll, and the holder has a pivot point of the tilt with respect to the slider. At equidistant positions, two sets of the driven rolls and the rotating grindstone are attached, and the rotating shafts of the two sets of driven rolls and the rotating grindstone are inclined in opposite directions to the rolling roll axis direction, Between the holder and the slider, wedge holes are formed on both sides of the shaft fulcrum, and wedges to be fitted into the respective wedge holes are formed at positions away from the traverser in the rolling roll axial direction,
When one wedge is fitted into one wedge hole, the holder is tilted, and the driven roll and rotating grindstone on the fitted side are in contact with the rolling roll, and the driven roll and rotating grindstone on the opposite side are separated from the rolling roll. It can also be.

It is preferable that the driven roll and the rotary grindstone are connected to each other with different diameters, or that the driven roll and the rotary grindstone are connected to each other with a different gear ratio. Further, it is preferable that the driven roll is a rotary grindstone.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. FIG. 1 shows an example in which the apparatus of the present invention is applied to upper and lower rolling rolls 1 incorporated in a rolling mill. The apparatus of the present invention comprises a driven roll 2, a rotary grindstone 3 and a holding and pressing mechanism. The driven roll 2 rotates in contact with the ground surface of the rolling roll 1, and the rotary grindstone 3 is
And are linked to operate at different peripheral speeds.

The holding and pressing mechanism comprises a holder 4 and a cylinder 7. The driven roll 2 and the rotary grindstone 3 are held by a holder 4 and pressed by a cylinder 7 in the direction of the arrow. In addition, a spring or the like may be used as the pressing mechanism. The holder 4 is attached to a stand or the like (not shown).

In the example of FIG. 1, the driven roll 2 and the rotating grindstone 3
Are connected by the belt 5 and the diameter of the rotating grindstone 3 interlocked with the driven roll 2 is made larger than the diameter of the driven roll 2, so that the rotating grindstone 3 is interlocked at a peripheral speed higher than the peripheral speed of the driven roll 2. . In FIG. 1, when the cylinder 7 is operated and the driven roll 2 and the rotary grindstone 3 are pressed against the rolling roll 1,
The driven roll 2 rotates in the direction of the arrow due to friction with the rolling roll 1, and the rotating grindstone 3 rotates in conjunction with the driven roll 2. At this time, since the peripheral speed of the rotating grindstone 3 is different from the peripheral speed of the driven roll 2 and the rolling roll 1, roll grinding can be performed.

FIG. 2 shows another example of the apparatus of the present invention. Since the driven roll 2 and the rotary grindstone 3 are connected by a gear 6 and have different gear ratios, the rotary grindstone 3 is interlocked at a peripheral speed different from the peripheral speed of the driven roll 2. Therefore, similarly to the example of FIG. 1 described above, the rolling roll 1 can be ground by the rotating grindstone 3. Also in this example, the holder 4 is attached to a stand or the like (not shown).

In the apparatus of the present invention, the driven roll 2 has a roll surface made of a material having a large friction coefficient with the ground surface of the roll 1 so that the driven roll 2 rotates with the rotation of the roll 1 as a drive source. I do. For example, heat-resistant rubber or the like having heat resistance at the surface temperature of the target rolling roll 1 or a grindstone can be used. Driven roll 2
The number of the rotating grindstones 3 may be one, or a plurality of them may be connected. When a grindstone is adopted as the driven roll 2, two wheels connected to rotate at different peripheral speeds are used.
One or three or more rotating grindstones are pressed against the rotating rolling roll 1, and one of the rotating grindstones is rotated by friction with the rolling roll 1, and roll grinding can be performed by another rotating grindstone.

Next, an example in which the driven roll 2 and the rotary grindstone 3 in the apparatus of the present invention can reciprocate in the axial direction of the rolling roll will be described. As shown in FIG.
A set of a driven roll and a rotary grindstone, that is, a set of a driven roll 21 and a rotary grindstone 31 and a set of a driven roll 22 and a rotary grindstone 32 are tilted with respect to a rotation axis in a direction opposite to a rolling roll axis to the holder 4. Installed. In this example, the inclination angle of the set of the driven roll 21 and the rotating grindstone 31 is + α, and the inclination angle of the set of the driven roll 22 and the rotating grindstone 32 is −α (opposite inclination angle).

As shown in the example of FIG. 4, the holder 4 is connected to the slider 8 by a pin 9 and is supported so as to be tiltable with respect to the slider 8. Is in contact with the rolling roll 1, the other set of the driven roll 22 and the rotating grindstone 32 are separated from the rolling roll 1.

In FIG. 3, when the rolling roll 1 is rotating in the direction of the arrow, when the holder 4 is tilted to bring the right driven roll 21 into contact with the rolling roll 1, the right driven set 21 is rotated. The grindstone 31 tries to traverse to the left. Further, when the left driven roll 22 is brought into contact with the rolling roll 1, the left set tries to traverse rightward.

As shown in FIG. 4, the holding and pressing mechanism has a holder 4, a slider 8 and a traverser 10, and the holder 4 is supported by the slider 8 with the pin 9 as described above. On the other hand, it is mounted so as to be able to reciprocate in the axial direction of the rolling roll. Reference numeral 7 denotes a pressing cylinder. The traverser 10 is reciprocally mounted in a rolling roll axis direction with respect to a stand or the like (not shown), and a striker 13 with which the traverser 10 abuts is fixed to both ends of a reciprocating range of the traverser 10.

A pin 9 is provided between the holder 4 and the slider 8.
Wedge holes 12 are formed on both sides of the shaft fulcrum, and wedges 11 to be fitted into the respective wedge holes 12 are formed at positions away from the traverser 10 in the rolling roll axis direction. And FIG.
As shown on the right side of the figure, the wedge 11 is fitted into the wedge hole 12 to incline the holder 4 so that the driven roll 21 and the rotary grindstone 31 on the fitted side come into contact with the rolling roll 1 and the driven roll 2 on the opposite side.
2 and the rotary grindstone 32 are configured to be separated from the rolling roll 1.

When a leftward force is applied to the right driven roll 21 in the state of FIG. 4 and the holder 4 and the slider 8 traverse to the left, the right bearing ball 14 is fitted into the bearing hole 15. , The traverser 10 also moves integrally with the slider 8. When the traverser 10 contacts the striker 13 on the left side, the slider 8 and the holder 4 continue to move leftward, so that the right bearing ball 14 moves out of the bearing hole 15 and moves into the wedge hole 12 on the left side. Wedge 11 is fitted. Then, the holder 4 tilts to the opposite side about the pin 9, the driven roll 21 and the rotating grindstone 31 separate from the rolling roll 1, and the driven roll 22 and the rotating grindstone 32 come into contact with the rolling roll 1.
At this time, the bearing ball 14 on the left is
To fit. Then, a rightward force acts on the left driven roll 22, and the holder 4, the slider 8, and the traverser 10 integrally traverse to the right.

In this way, the set of the driven roll 21 and the rotating grindstone 31 and the set of the driven roll 22 and the rotating grindstone 32 are alternately pressed against the rolling roll 1 while being reciprocated in the roll axis direction to set a predetermined set of the rolling roll. The range can be ground. The grinding range can be arbitrarily set depending on the position of the striker 13.

In the present embodiment, as shown in FIG.
Although the rotary grinding stones 22 and the rotary grindstones 31 and 32 are connected by the belt 5, respectively, they may be connected by gears. The pressing mechanism may be a spring or the like in addition to the cylinder 7. Further, the driven roll 2 can be a rotating grindstone.

[0022]

The grinding device of the present invention uses the rotation of the rolling roll as the drive source for the rotation of the grindstone and the traverse motion in the roll axis direction without using a drive source such as a hydraulic motor or an electric motor. Compact and easy to maintain. Also, the pattern of the grinding marks does not matter, and it can be applied not only to off-line but also to on-line grinding in a hot rolling mill in a hot and wet environment, and installed in a narrow rolling stand of a continuous rolling mill. In doing so, the stand and surrounding modifications may be small. Therefore, energy saving and cost reduction can be achieved in the grinding of the rolling roll, and the frequency of roll change is reduced by applying the present invention to online grinding, thereby improving the productivity of the rolling mill.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of the device of the present invention.

FIG. 2 is a side view showing another example of the device of the present invention.

FIG. 3 is a partial top view showing another example of the device of the present invention.

FIG. 4 is a front view showing another example of the device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Roll roll 2, 21, 22 ... Follower roll 3, 31, 32 ... Rotary grindstone 4 ... Holder 5 ... Belt 6 ... Gear 7 ... Cylinder 8 ... Slider 9 ... Pin 10 ... Traverser 11 ... Wedge 12 ... Wedge hole 13 ... Striker 14 ... bearing ball 15 ... bearing hole

Continuation of the front page (72) Inventor Narita Akita 1 Kimitsu, Kimitsu-shi Nippon Steel Corporation Kimitsu Works F-term (reference) 3C043 AC13 CC03 CC11 DD02

Claims (5)

[Claims] 1. A driven roll that rotates in contact with a surface to be ground of a rolling roll that is rotating, a rotating grindstone connected to the driven roll so as to interlock with a different peripheral speed, and holds the driven roll and the rotating grindstone. And a holding and pressing mechanism for pressing against the surface to be ground. 2. The holding and pressing mechanism includes a traverser and a slider that can reciprocate in the axial direction of a rolling roll, and a holder that is pivotally supported so as to be tiltable with respect to the slider, and is provided at both ends of a reciprocating range of the traverser. , A striker with which the traverser abuts is fixed, the slider is mounted on the traverser so as to be able to reciprocate in the axial direction of the rolling roll, and the holder is provided with two sets at equal intervals from the tilting fulcrum with respect to the slider. The driven roll and the rotating grindstone are attached, the rotating shafts of the two sets of driven rolls and the rotating grindstone are inclined in mutually opposite directions with respect to the rolling roll axis direction, and between the holder and the slider, Wedge holes are formed on both sides of the shaft fulcrum, wedges to be fitted into the respective wedge holes are formed at positions separated in the axial direction of the traversing roll, and one wedge is fitted into one wedge hole. The holder is tilted by doing so, the driven roll and the rotary grindstone on the fitted side are in contact with the rolling roll, and the driven roll and the rotary grindstone on the opposite side are configured to be separated from the rolling roll. 2. The rolling roll grinding device according to 1. 3. The apparatus for grinding a rolling roll according to claim 1, wherein the driven roll and the rotary grindstone are connected to each other with different diameters. 4. The apparatus according to claim 1, wherein the driven roll and the rotary grindstone are connected to each other with a different gear ratio.
Or a rolling roll grinding device according to 2 above. 5. The apparatus according to claim 1, wherein the driven roll is a rotary grindstone.