JPH0441008A - Grinding device for rolling roll - Google Patents

Abstract

PURPOSE:To accurately grind the outer peripheral surface of a rolling roll without moving a surface to be ground in a zigzag direction and to easily perform exchanging work in a short time by using a grinding stone for grinding the rolling roll. CONSTITUTION:When the rolling roll 2 is ground, the rolling roll 2 is turned a motor 13 for a moving frame is driven to move the moving frame 6 in the lengthwise direction of the rolling roll 2 and to adjust the position of the moving frame 6 so that a rotary grinding stone 51 faces a part of the rolling roll 2 to be ground, then, the motor 30 for driving the grinding stone is driven to rotate the rotary grinding stone 51, and also, a double stage telescopic fluid pressure cylinder 23 is actuated to transfer a slide frame 21 toward the rolling roll 2 and the rotary grinding stone 51 is brought into contact with the outer peripheral surface of the rolling roll 2 to grind the rolling roll 2.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a mill roll grinding device.

[Prior art] The rolling rolls of rolling mills tend to wear locally at the portions corresponding to the widthwise ends of the material to be rolled, such as slabs, and as the rolling rolls are used, the roll surfaces tend to wear out. It may cause rough skin, so it may be necessary to grind it regularly.

Conventionally, as a method for grinding the outer circumferential surface of a rolling roll without removing it from a rolling mill housing, Japanese Patent Publication No. 1-332
There is a rolling roll grinding device disclosed in Publication No. 42,
The grinding device is configured to press the grinding belt against the outer circumferential surface of the rolling roll through a pressing member using an elastic spring, and to grind the outer circumferential surface of the rotating rolling roll by running the grinding belt. has been done.

[Problems to be Solved by the Invention] However, the conventional device described above has the following problems.

(1: Meandering may occur when the grinding belt runs, which may affect the grinding accuracy of the rolling roll.

(Z If the pressing force during grinding is excessive, the grinding belt will break.

(3) If the grinding belt breaks, the grinding belt must be replaced together with the reel for feeding and winding the belt, so it is not possible to easily replace the grinding belt in a short period of time.

The present invention solves the above-mentioned problems, and aims to provide a mill roll grinding device that has good grinding accuracy and allows easy replacement of the grinding member.

[Means for Solving the Problems] In order to achieve the above object, in the mill roll grinding apparatus of the present invention, a slide frame is attached to a movable frame that is disposed so as to be movable in the longitudinal direction of the mill roll. The frame is supported so that it can move toward and away from the outer peripheral surface of the roll, and the frame is supported so that it can move forward and backward in a direction parallel to the moving direction of the slide frame. A grinding wheel parallel to the rolling roll is rotatably attached to the end of the frame on the rolling roll side, and an elastic body is provided between the slide frame presser and the frame to urge the grinding wheel toward the rolling roll. .

Further, the slide frame is supported by a moving frame disposed so as to be movable in the longitudinal direction of the rolling roll so as to be able to move toward and away from the outer peripheral surface of the rolling roll, and the frame is pressed against the sliding frame, and the frame is slidable. The frame is supported so that it can move forward and backward in a direction parallel to the moving direction of the frame, and the pressing is applied to the rolling roll side end of the frame.
A grindstone is rotatably mounted parallel to the rolling roll and supported via an elastic support, and an elastic body is provided between the slide frame presser and the frame to urge the grinding stone toward the rolling roll. be.

[Function] When performing grinding work on a rolling roll, in any of the apparatuses described in claim 1.2 of the present invention, the rolling roll is rotated and the moving frame is moved in the longitudinal direction of the rolling roll. Then, adjust the position of the grinding wheel so that it faces the part of the roll that is to be ground. Next, rotate the grinding wheel and move the slide frame toward the roll to place the grindstone on the outer circumferential surface of the roll. When brought into contact with each other, the grindstone is pressed against the rolling roll by the repulsive force of the elastic body, thereby grinding the rolling roll.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention. In FIG. 1, 1 is a rolled material such as a slab that moves in the direction of arrow A, 2 is a rolling roll for forming the rolled material 1, 3 is a reinforcing roll that comes into contact with the rolling roll 2.

A rod-shaped guide beam 4 extending parallel to the rolling roll 2 is disposed on the downstream side of the reinforcing roll 3 in the direction of movement of the rolled material l (direction of arrow A), and is supported by the rolling mill housing 16. A rack gear 5 extending in the longitudinal direction of the guide beam 4 is fixed to the upper surface of the guide beam 4 (see FIG. 1).

A channel-shaped moving frame 6 is fitted onto the guide beam 4 from below so as to be movable in the longitudinal direction of the rolling roll 2, and a stopper plate 7 is attached to the upper surface of the moving frame 6.
is fixed so as to cover the upper surface of the guide beam 4 to prevent the movable frame 6 from falling off from the guide beam 4.

The bottom surface of the stopper plate 7 is provided with a stopper plate 7 when the moving frame 6 moves along the guide beam 4.
A notch 8 is formed so as not to interfere with the rack gear 5.

Further, the stopper plate 7 is provided with a gear hole 9 that penetrates from its upper surface to its lower surface.

A liner 11 is fixed to the groove 10 of the movable frame 6 and the stopper plate 7 so as to be able to abut each surface of the guide beam 4 in the circumferential direction, so that the movable frame 6 is smooth in the longitudinal direction of the rolling roll 2. It is now possible to move to.

A movable frame motor 13 is fixed to the upper surface of the stopper plate 7 via a bracket 12, and a pinion gear 15 fitted on the drive shaft 14 of the movable frame motor 13 is meshed with the rack gear 5 through the gear hole 9.

A pair of left and right side plates 17 are fixed to the lower surface of the moving frame 6 in parallel in the width direction of the rolled material 1, and rolling rolls are mounted on the mutually opposing surfaces of the side plates 17 when viewed in the width direction of the rolled material 1. A pair of upper and lower guide members 18 parallel to each other and extending obliquely from above to below from the downstream side in the moving direction (direction of arrow A) of the rolled material 1 of No. 2 toward the vicinity of the axis of the rolling roll 2 are fixed to each other (Fig. 1). , see Figures 2 and 3).

The vertical slide plates 19 are connected and fixed via a pair of left and right side plates 20 to form a hook-shaped slide frame 21 with openings at the front and rear ends. A two-stage telescopic fluid pressure cylinder 23 is fitted into the enclosed space so as to be able to slide in an oblique direction along the vertical guide member 18, and is fixed to the lower surface of the movable frame 6. A piston rod 25 of a two-stage telescopic fluid pressure cylinder 23 is connected to a bracket 24 fixed to the upper surface of the upper slide I/plate 19 by pins 26 and 27.

For pressing, the frame 28 supports the longitudinal intermediate portion of the drive shaft 29 extending in the longitudinal direction of the rolling roll 2, and
For pressing, grindstone drive motors 30 are fixed to the left and right sides of the frame 28, and for pressing, a gear 31 supported within the frame 28 is used.
The rotation of the grinding wheel drive motor 30 via the drive shaft 29
(See Fig. 4).

The bushing 50 is fitted into the annular grindstone 34 and the rotary grindstone 51 is rotated.
The rotating grindstones 51 are attached to each of the left and right protrusions of the drive shaft 29, two each, and the nuts 39 are screwed to the left and right ends of the drive shaft 29, so that the rotating grindstones 51 fall off from the drive shaft 29. Make sure to fit it so that it does not get stuck.

A key 40 extending in the longitudinal direction is provided on the outer peripheral surface of the drive shaft 29.
Furthermore, a key groove (not shown) corresponding to the key 40 is carved on the inner circumferential surface of the bush 50, and the drive shaft 2
9 and the rotary grindstone 51 are arranged so that they do not rotate relative to each other in the circumferential direction.

A box-shaped guide frame 41 is formed whose front and rear ends are open and which extends in the direction of movement of the material to be rolled 1 (in the direction of the arrow).
It is inserted so that it is slidable and the rotary grindstone 51 faces upstream in the moving direction of the rolled material 1 (direction of arrow A).

A notch 42 is formed on the side surface of the upstream end of the guide frame 41 in the direction of movement of the rolled material 1 (direction of arrow A), and when the frame 28 moves, the pressing is performed by the kite frame 41 and the grindstone drive. It is designed so that it does not interfere with the motor 30 (see Fig. 5).

A guide pipe 43 extending in the moving direction of the rolled material 1 (direction of arrow A) is fixed in the guide frame 41 so that the pressing member is located downstream of the frame 28 in the moving direction of the rolled material 1 (arrow A direction), For pressing, a load cell 44 for detecting pressing force is mounted on the downstream side of the frame 28 in the direction of movement of the rolled material 1 (direction of arrow A) (see FIG. 2).

Spring seats 46 and 47 with elastic springs 45 interposed between them are inserted into the guide pipe 43 so that one of the spring seats 46 can come into contact with the load cell 44, and the rolled material 1 of the guide frame 41 A pressing force adjusting cylinder 48 is provided at the downstream end in the moving direction (arrow A direction), the piston rod 49 of the pressing force adjusting cylinder 48 is screwed onto the other spring seat 47, and the guide frame 41 is A rotating grindstone 51 is fixed to the slide frame 21 so as to face the rolling roll 20.

The present invention will be explained in detail below.

When grinding the rolling roll 2, the rolling roll 2 is rotated and the moving frame motor 13 is driven to move the moving frame 6 in the longitudinal direction of the rolling roll 2. The position of the rotary whetstone 51 is adjusted so that it faces the part to be ground, and then the whetstone driving motor 30 is driven to rotate the rotary whetstone 51 and the two-stage telescopic fluid pressure cylinder 23 is rotated.
By operating the slide frame 21 toward the rolling roll 2, the rotary grindstone 51 is moved toward the rolling roll 2.
The rolling roll 2 is brought into contact with the outer circumferential surface of the rolling roll 2, and the rolling roll 2 is ground.

At this time, the grinding surface of the rotary grindstone 51 does not meander like a grinding belt, so that the rolling roll 2 can be ground with high precision.

When adjusting the pressing force of the rotary grindstone 51 against the rolling roll 2, the pressing force adjustment cylinder 48 is operated to move the piston rod 49 forward or backward.

When the piston rod 49 moves forward, the spring 45
is compressed, the repulsive force of the resilient spring 45 becomes strong, and the pressing force of the rotary grindstone 51 against the rolling roll 2 increases.On the other hand, when the piston rod 49 retreats, the resilient spring 4
5 expands, the repulsive force of the resilient spring 45 weakens, and the pressing force of the rotary grindstone 51 against the rolling roll 2 decreases.

When replacing the rotary whetstone 51, the two-stage telescopic fluid pressure cylinder 23 is operated to separate the rotary whetstone 51 from the rolling roll 2, the nut 39 is removed, the worn whetstone 51 is removed from the drive shaft 29, and a new rotary whetstone is replaced. 51
After attaching the rotary grindstone 51 to the drive shaft 29, a nut 39 is screwed onto the drive shaft 29 to prevent the rotary grindstone 51 from falling off the drive shaft 29.

By attaching and detaching the nut 39 in this manner, the rotary grindstone 5I can be easily replaced.

FIG. 6 shows another embodiment of the present invention, in which parts given the same reference numerals as in FIGS. 1 to 5 represent the same parts.

A bushing 35, an elastic support 36 formed of an elastic body such as rubber into a substantially annular shape, and a bushing 37 are sequentially fitted into an annular grindstone 34 to form a rotating grindstone 38, which is attached to the left and right protrusions of the drive shaft 29. At the same time, nuts 39 are screwed onto the left and right ends of the drive shaft 29 to attach two nuts to each part of the rotary grindstone 3.
8 and the drive shaft 29 so that it does not fall off.

A key 40 extending in the longitudinal direction is provided on the outer peripheral surface of the drive shaft 29.
However, a keyway (not shown) corresponding to the key 40 is carved on the inner peripheral surface of the bushing 37, and the drive shaft 2
9 and the rotary grindstone 38 are arranged so that they do not rotate relative to each other in the circumferential direction.

In the rotary whetstone 38 having the above configuration, even if an impact force is applied to the rotary whetstone 38 when the rotary whetstone 38 is brought into contact with the rolling roll 2, the whetstone 34 is moved to the drive shaft 29 through the elastic support 36. Since the grindstone 34 is supported by the grindstone 34, the grindstone 34 will not be broken by impact force.

Further, like the rotary whetstone 51, the grinding surface of the rotary whetstone 38 does not meander like a grinding belt, so that the rolling roll 2 can be ground with high precision.

When replacing the whetstone 38, remove the nut 39, remove the worn whetstone 38 from the drive shaft 29, attach the new whetstone 38 to the drive shaft 29, and then remove the worn whetstone 38 from the drive shaft 29.
A nut 39 is screwed onto the rotary grindstone 38 to prevent it from falling off the drive shaft 29.

By attaching and detaching the nut 39 in this manner, the rotary grindstone 38 can be easily replaced.

Note that the mill roll grinding device of the present invention is not limited to the above-mentioned embodiments, but may also include the use of other elastic bodies in place of the elastic springs, and the use of a two-stage telescopic fluid pressure cylinder. Of course, various changes may be made without departing from the spirit of the present invention, such as using a general fluid pressure cylinder instead or changing the arrangement of the rotary grindstone as appropriate.

[Effects of the Invention] As explained above, according to the mill roll grinding device of the present invention, various excellent effects as described below can be achieved.

(1) In any of the apparatuses described in claim 1.2 of the present invention, since a grindstone is used for grinding the rolling roll, the grinding surface does not meander, and the grinding work of the outer circumferential surface of the rolling roll can be performed with high precision. Furthermore, when the grindstone needs to be replaced, only the rotatably supported grindstone needs to be replaced, so the replacement work can be easily done in a short time.

(2) In the apparatus according to claim 2 of the present invention, since the grindstone is supported via an elastic support, the grindstone will not be broken by the impact force when the grindstone comes into contact with the rolling roll.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention, FIG. 2 is a view along the ■-■ arrow in FIG. 1, FIG. 3 is a view along the ■-■ arrow in FIG. 1, and FIG. 5 is a cutaway plan view showing the details of the press block, FIG. 5 is a view taken along the VV arrow in FIG. 2, and FIG. 6 is a cutaway plan view showing the details of the press block in another embodiment of the present invention. In the figure, 2 is a rolling roll, 6 is a moving frame, 21 is a slide frame, 28 is a pressing frame, 34 is a grindstone, 3
B indicates an elastic support, and 45 indicates an elastic body.

Claims (1)

[Claims] 1) A slide frame is supported on a moving frame disposed so as to be movable in the longitudinal direction of the rolling roll so as to be able to approach and move away from the outer peripheral surface of the rolling roll, and A pressing frame is supported so as to be able to move forward and backward in a direction parallel to the moving direction of the slide frame, and a grindstone parallel to the rolling roll is rotatably attached to the rolling roll side end of the pressing frame, and the sliding frame A grinding device for a rolling roll, characterized in that an elastic body is provided between the pressing frame and an elastic body that urges the grindstone toward the rolling roll. 2) A slide frame is supported by a moving frame arranged to be movable in the longitudinal direction of the rolling roll so as to be able to move toward and away from the outer peripheral surface of the rolling roll, and the frame is pressed against the sliding frame, and the sliding frame A grinding wheel is supported so as to be able to move forward and backward in a direction parallel to the moving direction of the pressing frame, and a grindstone is rotatably attached to the end of the pressing frame on the side of the rolling roll, parallel to the rolling roll and supported via an elastic support. . A mill roll grinding device, characterized in that an elastic body is provided between the slide frame and the pressing frame to urge the grindstone toward the mill roll.