JPH02104408A - Rolling mill and grinding equipment with grinding equipment - Google Patents

Abstract

PURPOSE:To stably grind a work roll in an on-line by holding a grinding wheel to be rotatable and installing the wheel as to abut on both the work roll and a supporting roll. CONSTITUTION:A grinding wheel 3 is installed to abut on a work roll 1 and a reinforcing roll 2 respectively, so that the wheel 3 is stably supported by both the rolls 1 and 2. By that structure, a rolling mill provided with a grinding device excellent in stability is obtained because the wheel 3 can grind the roll 1 without chattering; it is not required to independently set a driving device for the grinding device because driving force for the wheel 3 is supplied from the driving force of the roll 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grinding device for grinding the body of a roll used in a rolling mill, and particularly to a grinding device suitable for online grinding of rolls in a multi-high rolling mill. The present invention relates to a rolling mill equipped with a rolling mill.

[Conventional technology]

In plate rolling mills, especially hot rolling mills, roll wear at the part where the work roll passes through the plate width is large, and this has a negative effect on the plate surface quality and plate profile, so it is recommended to replace the rolls early or change the rolling coil plate width. There were restrictions on each rolling. As a method to overcome this obstacle, a so-called on-line grinding method has been developed in which work rolls are ground while installed in a rolling mill.

As described in Japanese Unexamined Patent Application Publication No. 193707/1984, the conventional device is such that the side surface of the grinding wheel is brought into contact with the object to be ground at an angle, and the grinding wheel is rotated by the driven rotation of the object to be ground, and the difference in circumferential speed is The purpose is to use the grinding method.

[Problem to be solved by the invention]

The technology of grinding rolls using grinding equipment offline, ie, in a roll shop, is nearing completion.

However, there are problems with the roll grinding method installed in a rolling mill, that is, on-line. The reason is that the inside of a rolling mill is cramped with guides, roll cooling water piping, etc., and the internal environment is poor due to water, scale, heat, vibration, etc. Furthermore, a normal separate type roll grinding machine,
The grindstone is supported by a sufficiently rigid grindstone stand and frame to prevent chatter vibration caused by the grindstone drive motor that drives the rotation of the grindstone. It is almost impossible to bring such a device into the rolling mill due to space constraints.

The conventional technique described in Japanese Patent Application Laid-Open No. 193707/1988 realizes online roll grinding. In this prior art, a grindstone is placed in oblique contact with an object to be ground, a sliding friction is generated between the object to be ground and the grinding wheel, and this sliding friction causes the grindstone to rotate together. However, if the grindstone rotates at the same speed as the object to be ground, grinding is hardly possible, so the object to be ground is ground by controlling this rotation with a rotation suppressor and providing relative slip. However, in the above technology, since the object to be ground is ground using the peripheral speed difference as in 1 or more, it is difficult to grind the wear of the roll, and it is difficult to grind the wear part of the roll, and it is only possible to improve the rough surface of the roll. remains.

Further, in this prior art, since the grinding wheel itself is in one-point contact with the grinding roll, it does not have a stable holding function, and there is also the problem that chatter vibration occurs during high-speed rolling.

The first object of the invention is to provide a rolling mill equipped with a grinding device that has a compact structure and enables online roll grinding with excellent stability and no chatter vibration.

The second object of the invention is to provide a rolling mill equipped with a grinding device that enables online roll grinding that is compact and highly stable, and that grinds the rolls without separately installing a drive source for the grinding device. It's about doing.

[Means to solve the problem]

The first invention is to provide a rolling mill equipped with a grinding device having a compact structure and excellent stability.
This is achieved by arranging the work roll to be in contact with a rotating work roll and a support roll that supports this roll.

In addition, the second invention provides a rolling mill equipped with a grinding device that is compact and has excellent stability and can grind a roll without separately installing a drive source for the grinding bag. The grinding device is configured to be rotatable, the grinding wheel is brought into contact with a work roll and a support roll, and the grinding device is further provided with a first pressing means for pressing the grinding wheel against the support roll. This is achieved by applying driving force to the grinding wheel.

[Effect]

In the first invention, a grinding wheel of a grinding device or a part of the grinding wheel and the grinding device are arranged so as to abut on a work roll and a support roll, respectively. The grinding device is supported by the work roll and the support roll, and the grinding device has a compact structure and can grind the work roll without causing chatter vibration.

In addition, in the second aspect of the present invention, by arranging the grinding wheel provided in the grinding device so as to contact the work roll and the support roll, a compact structure and a highly stable structure can be obtained. Furthermore, the grinding device is provided with a first pressing means for pressing the grinding wheel against the support roll. Since the pressing means presses the grinding wheel against the support roll with a sufficiently larger force than the work roll, the driving force of the grinding wheel can be obtained from the driving force of the support roll.

In other words, by making the frictional driving force of the support roll against the grinding wheel larger than the grinding tangential force of the work roll of the grinding wheel, the grinding wheel rotates with the support roll without slipping, so driving force can be obtained, and the The work roll can be ground without providing a separate drive source for driving force.

〔Example〕

Hereinafter, a rolling mill equipped with a grinding device which is an embodiment of the present invention will be described. Figure 1 explains the functions in Figure 2.

FIG. 3 shows a concrete example structure. However, since the structure of the lower half grinding device is the same as that of the upper half, the explanation will be omitted.

FIG. 2 shows an embodiment suitable for a four-high rolling mill, in which the roll to be ground is a work roll 1, and the work roll 1 is supported by a reinforcing roll 2. The grinding wheel 3 is attached to the tip of a lever 4, a link 5 is attached to the center of the lever 4, and the lever 4 is held rotatably around the link 5. A cylinder 6 and a cylinder 7 are connected to the lever 4, respectively, and the cylinders 6 and 7 adjust the force with which the grinding wheel 3 is pressed.

That is, the link 5 supports the lever 4 so as to be rotatable in the vertical direction so that the grinding wheel 3 reliably contacts both the work roll 1 and the reinforcing roll 2. By doing this, even if the work roll 1 and the reinforcing roll 2 change in diameter due to roll wear, etc., the grinding wheel 3 can always be held in the proper position, and the pressing force from the cylinders 6 and 7 can be applied to the lever. Since it becomes possible to press the grinding wheel 3 against both rolls 1 and 2 via the roller 4, stable support can be achieved. In addition, in the explanation of the rotation function of the lever 4 by the link 5, an embodiment in which the lever 4 is equipped with only the grinding wheel 3 has been described, but the present invention can also be applied to an embodiment in which the lever 4 is equipped with a rotating roller, which will be described later, in addition to the grinding wheel. Needless to say.

Here, the force P of the grinding wheel 3 pressed against the reinforcing roll 2 is mainly controlled by the output of the cylinder 6 via the lever 4, and the force Q of the grinding wheel 3 pressed against the work roll 1 is mainly controlled by the output of the cylinder 7. The two cylinders 6.7 can also be replaced by one cylinder (not shown) operated in the direction of their resultant force.

As described above, the grinding wheel 3 is connected to the cylinders 6 and 7.
By pressing the grinding device against the work roll 1 and the reinforcing roll 2 through the operation, the grinding device is supported by both the work roll 1 and the reinforcing roll 2, and the body of the work roll 1 can be stably ground. . Furthermore, if the driving force of the grinding wheel 3 is set to a sufficiently larger pressing force (P>Q) of the grinding wheel 3 against the reinforcing roll 2 than on the work roll 1, the grinding wheel 3 will rotate in synchronization with the reinforcing roll 2. To do this, grinding wheel 3
The driving source for this can be obtained sufficiently from the reinforcing roll 2,
The work roll 1 can be ground without separately installing a drive source.

Further, FIG. 1 shows the specific structure of FIG. 2, and FIG. 3 is a sectional view taken along the line 1--2 in FIG.

In FIG. 1, a lever holder 11 that supports a lever 4 equipped with a grinding wheel 3 is fixed to a slider 12. As shown in FIG. The slider 12 is used as a support point, the cylinders 6 and 7 are connected to the lever 4 at their respective positions, and the grinding wheel 3 is arranged so as to contact both the work roll 1 and the reinforcing roll 2. The slider 12 is supported by a frame 13.

The frame 13 is moved in the roll axis direction by rotating the screw 19 via the worm reducer 18 by the rotation of the motor 17 on the orbit of the frame 13 . The frame 13 has a tip end rotatably pin-jointed to a bracket 14 attached to a housing 15, and a tip end supported by a cylinder 16.
When the grinding wheel 3 grinds the work roll 1, the frame 13 is positioned by operating the cylinder 16 so that the stopper 20 comes into contact with the housing 15, and at the same time, the grinding wheel 3 is rotated by the operation of the cylinder 16. Supports the reaction force generated. Further, when changing the rolls, the cylinder 16 is moved back to a position where it does not interfere with the movement of the roll and chock assembly.

FIG. 3 shows an embodiment in which two sets of grinder units are provided in the frame 13 and are spaced apart from each other in the roll axis direction.
2a is a worm reducer 18 driven by a motor 17a.
It is moved by the rotation of the screw 19a via the screw 19a. The slider 12b, which is a ground assembly grinder unit, also has a motor 17b, a worm reducer 18b, and a screw 19b.
Move by.

By configuring as described above, the following effects can be achieved.

In other words, since the grinding wheel 3 is arranged so as to be in contact with the work roll 1 and the reinforcing roll 2, the grinding wheel 3
is stably supported by both the work roll 1 and the reinforcing roll 3.

As a result, the grinding wheel 3 can grind the work roll 1 without causing chatter vibration, so that a rolling mill equipped with a grinding device with excellent stability can be obtained.

Further, the grinding wheel 3 is arranged so as to be in contact with the work roll 1 and the reinforcing roll 2, respectively, and the grinding wheel is pressed against the reinforcing roll 2 by a first pressing means and by pressing against the first working roll 1. A second pressing means is provided in the grinding device, and the pressing force of the first pressing means is made sufficiently larger than the pressing force of the second pressing means. That is, by pressing the grinding wheel 3 against the reinforcing roll 2 with a sufficiently larger force than the work roll 1, the driving force of the grinding wheel 3 is obtained from the driving force of the reinforcing roll 2, and the work roll 1 can be ground. It is possible to obtain a rolling mill equipped with a grinding device that can generate a driving force of 100 mm without separately installing a drive source such as an electric motor.

Further, for the purpose of providing a rolling mill equipped with a grinding device with excellent stability, the embodiments shown in FIGS. 4 and 6 can be considered.

FIG. 4 shows the grinding device in FIG. 1 replaced with the device described below. FIG. 5 is a top view of the grinding device. The grinding device is equipped with a grinding wheel 3 and a grinding wheel auxiliary roll 21. While pressing the grinding wheel 3 against the work roll 1, the grinding wheel auxiliary roll 21 is pressed against the reinforcing roll 2.
press against.

In this way, the grinding wheel 3 and the grinding wheel auxiliary roll 21 are supported in contact with the work roll 1 and the reinforcing roll 2, respectively, so that chatter vibration of the grinding device is prevented and the work roll 1 can be stably ground. In this device, the driving force of the grinding wheel is transmitted from the motor 23 via the belt 22.

FIG. 6 shows a similar device to that shown in FIG. The grinding device includes a grinding wheel 3 and a grinding wheel auxiliary roll 21(a).

21(b) is provided. Grindstone auxiliary roll 21 (a
), 21 (b) are respectively supported in contact with the work roll 1 and the auxiliary roll 2, thereby preventing chatter and vibration of the grinding device. The grinding wheel 3 is located at the tip of the lever 4. Then, by operating the cylinder 24, the grinding wheel 3 is pressed against the work roll 2. In this device, the driving force of the grinding wheel 3 is transmitted from the motor 23 via the belt 22.

Note that FIG. 7 is a top view of FIG. 6.

Moreover, by equipping two roll grinding devices in the roll axis direction, various grinding methods become possible.

Examples thereof are shown in FIGS. 8 and 9. FIG. 8 shows the grinding situation at the end of the roll, and FIG. 9 shows the grinding situation at the center of the roll.

In other words, if it is necessary to grind the end of the roll due to the wear shape of the roll, as shown in Fig. 8, roll grinding devices each having a grinding wheel 3 are arranged at both ends of the work roll, and only the necessary parts are ground as shown by the arrows. Cyclically moving and grinding.

If grinding of the central part of the roll is required, two sets of roll grinding devices each having a grinding wheel 3 may be moved simultaneously as shown in Fig. 9, or one set may be kept on standby at the position indicated by the two-dot chain line. , it becomes possible to perform highly efficient grinding according to the purpose.

〔Effect of the invention〕

According to the first invention, it has a compact structure.

The effect of obtaining a rolling mill equipped with a grinding device that enables online roll grinding with excellent stability and suppressed chatter vibration is achieved.

Further, according to the second invention, there is provided a rolling mill equipped with a grinding device that enables on-line roll grinding which is compact and has excellent stability, and which grinds the rolls without separately installing a drive source for the grinding device. The effect of obtaining an opportunity is achieved.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of a rolling mill equipped with a grinding device showing one embodiment of the present invention, Fig. 2 is a functional explanatory diagram of the present invention, and Fig. 3 is a sectional view taken along 4 is a partial sectional view showing another embodiment of the present invention, FIG. 5 is a top view of FIG. 4, FIG. 6 is a partial sectional view showing still another embodiment of the present invention, and FIG. 6 is a top view of FIG. 6, and FIG. 8 is an explanatory diagram showing a method of grinding a roll end portion using the roll grinding apparatus of the embodiment shown in FIG. 1. FIG. 9 is an explanatory diagram showing a method of grinding the central portion of the roll. 1... Work roll, 2... Reinforcement roll, 3... Grinding wheel, 4... Lever, 5... Link, 6... Cylinder, 7... Cylinder, 8... Grinding wheel stand , 9... Frame, 10... Rolled material, 11... Lever holder, 12
...Slider, 13...Frame, 14...Bracket, 15.Housing, 16...Cylinder, 17
...Motor, 18...Worm reducer, 19...
Screw, 20 ・Stopper, 21... Grindstone auxiliary roll, 22... Belt, 23... Grind, 'J +-jQ=/ Rod IG / V7 factor

Claims (1)

[Scope of Claims] 1. In a rolling mill equipped with a grinding device having a work roll that is driven to rotate, a support roll that supports the roll, and a grinding wheel that grinds the roll, the grinding wheel of the grinding device can be rotated. 1. A rolling mill equipped with a grinding device that holds the work roll and is disposed in contact with the work roll and the support roll to grind the work roll. 2. In a rolling mill equipped with a grinding device having a drive-rotating work roll, a support roll that supports the roll, and a grinding wheel for grinding this roll, the grinding wheel is rotatably provided in the grinding device, and a rotating body is provided. A rolling mill equipped with a grinding device, characterized in that the grinding wheel and the rotating body are arranged in contact with the work roll and the support roll, respectively, and grind the work roll. 3. In a rolling mill equipped with a grinding device having a drive-rotating work roll, a support roll that supports the roll, and a grinding wheel that grinds the roll, the grinding device has a pair of wheels that are in contact with the work roll and the support roll, respectively. A rotating body is installed, and when grinding the work roll, the grinding device is arranged so as to be in contact with both the work roll and the support roll via the rotating body, and the grinding wheel provided in the grinding device is used to grind the work roll. A rolling mill equipped with a grinding device that performs grinding. 4. In a rolling mill equipped with a grinding device having a driving and rotating work roll, a support roll that supports the roll, and a grinding wheel that grinds the roll, the grinding wheel is configured to be rotatable, and the grinding wheel is configured to be rotatable. The grinding device is provided with a first pressing means that is brought into contact with the roll and the support roll and further presses the grinding wheel against the support roll, and a driving force is applied from the support roll to the grinding wheel to cause the drive rotation. A rolling mill equipped with a grinding device, characterized in that the work roll is ground by a grinding wheel. 5. In a rolling mill equipped with a grinding device according to claim 3, a second pressing means for pressing the grinding wheel against the work roll is provided in the grinding device, and the first pressing means A rolling mill equipped with a grinding device, characterized in that the pressing force of the second pressing means is set to be sufficiently larger than the pressing force of the second pressing means. 6. A rolling mill equipped with a grinding device having a drive-rotating work roll, a support roll that supports the roll, and a grinding wheel that grinds the roll, wherein the grinding device includes a support member on which the grinding wheel is mounted, and a support roller that supports the roll. A rolling mill equipped with a grinding device, characterized in that it is equipped with a stop member that rotatably stops a member along the vertical direction, and a pressing means that is connected to the support member and presses the grinding wheel toward the roll side. . 7. A rolling mill equipped with a grinding device that has a drive-rotating work roll and a support roll that supports the roll, rotatably holds a grinding wheel, and places the grinding wheel in contact with the work roll and support roll. Machine. 8. In a grinding device for grinding a roll of a rolling mill, the grinding wheel includes a support member equipped with a rotatable grinding wheel, a stop member that stops the support member rotatably along the vertical direction, and A grinding device comprising a pressing means connected to a support member and pressing the grinding wheel toward the roll.