JPH0335442Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mill roll grinding device, and more particularly to a grinding belt meandering prevention device.

In general, the rolling rolls of rolling mills tend to wear locally at the parts that correspond to the edges of the rolled material such as slabs, and the outer surface of the rolls needs to be ground periodically to remove the fatigue layer on the roll surface. There is. This grinding has conventionally been performed offline using a rotating grindstone, but recently it has become possible to perform it online by using a grinding belt instead of the rotating grindstone. Figure 1 shows an example of this belt grinding device.
Briefly explained based on FIG. 2, a grinding machine main body 3 is provided that moves laterally along a traverse rod 2 that extends parallel to the rolling roll 1, and a grinding belt 4 is fed out onto the grinding machine main body 3. , a pair of reels 5 and 6 for winding, and a pair of reels 5 and 6 that support the back surface of the grinding belt 4 and are movable back and forth in the axial direction of the roll 1 in order to roll it onto the outer peripheral surface of the roll 1. A pressing member 7 is provided at the top. Guide rollers 8 and 9 for guiding the grinding belt 4 are provided on the tip side of the pressing member 7 and on the side of the pair of reels 5 and 6, and the pressing member 7 guides the grinding belt 4 to the rolling roll 1 during grinding. While pressing and winding under the guidance of guide rollers 8 and 9 at a relatively slow speed, the grinder main body 3 is moved laterally to grind the outer surface of the roll 1, and when not grinding, the pressing member 7 is separated from the roll 1. The grinding belt 4 is fast-forwarded and guided by guide rollers 8 and 9 to be rewound onto the reel 5 on the feed-out side in preparation for the next grinding.

However, according to the above belt grinding device, the unbalance of the grinding force in the belt width direction that occurs during grinding, and the unbalance of the guide rollers 8, 9 and reel that affect both grinding and non-grinding and are unavoidable due to the structure. Even when the grinding belt 4 is guided by the guide rollers 8 and 9, the grinding belt 4 still tends to shift due to deviations in the parallelism of the fifth and sixth axes, resulting in belt meandering. When this belt meandering occurs, it not only becomes impossible to perform uniform grinding, but also winding and unwinding become impossible, making grinding itself impossible, which has been a major problem.

This invention was made based on the above circumstances, and its purpose is to provide a belt meandering prevention device for a mill roll grinding device that can effectively prevent meandering of the grinding belt and smoothly grind the outer surface of the mill roll. It is to obtain.

In order to achieve the above object, the belt meandering prevention device of this invention uses a pressing member to press the grinding belt against the outer circumferential surface of the rolling roll and winds it up while moving the grinding machine body horizontally for grinding, and when not grinding, pulls it away from the rolling roll. In a grinding device for a rolling roll, in which the grinding belt is rewound in a state in which the grinding belt is rewound, the roller surface faces both ends of the grinding belt in the widthwise direction of the grinding belt in the vicinity of the pressing member, and the roller shaft extends from the inside to the outside in the width direction of the grinding belt. A pair of side rollers are provided in an upright manner so as to be inclined to open outward, and are rotatably supported around their roller axes. An arm that supports the grinding belt so that it can be rotated freely in the direction of deviation of the grinding belt around a point deviated along the traveling direction, and a side roller that is urged inward in the width direction of the grinding belt to return the rotated side roller. The present invention is characterized by comprising a spring, and a stopper that restricts the side rollers from turning inward in the width direction of the grinding belt to the normal position when the side rollers return.

The above pair of side rollers are supported by an arm,
The center of rotation of the arm is located at a point offset along the direction of movement of the grinding belt from an outward extension line in the width direction of the grinding belt passing through the pair of side rollers. Therefore, when the grinding belt shifts to one side, the side rollers rotate in the direction of the one-sidedness of the grinding belt around this point, thereby being able to cope with even a large shift.

Furthermore, since this rotation is performed against the spring that urges the arm inward in the width direction of the grinding belt, the impact is absorbed. Furthermore, since the side rollers rotate around their roller axes, the above-mentioned shock absorption is facilitated.

Further, the side rollers stand up such that their roller surfaces face the widthwise ends of the grinding belt and the roller shafts are inclined outwardly from the inside in the width direction of the grinding belt. For this reason, the end of the grinding belt applies a turning moment to the arm and rides on the side roller surface, causing it to curve gently, which may damage the end of the grinding belt or cause it to bend and grind the guide roller. This will prevent the situation from occurring. When the end of the grinding belt rides on the surface of the side roller, the grinding belt bulges in a mountain shape around the side roller when viewed from the belt end direction, so the belts move in opposite directions on both sides of the grinding belt in the longitudinal direction around the side roller. Tension is generated, and the combined force of both belt tensions acts downward to return the abrasive belt to its normal position relative to the side rollers. The trajectory correction of the grinding belt is performed by the cooperation of the belt tension and the return action of the spring.

Furthermore, even if the inclination of the side rollers with respect to the grinding belt in the normal position is, for example, 45°, the angle between the grinding belt surface and the axis of the side rollers gradually increases as the arm rotates outward. Become,
The greater the deviation of the grinding belt, the steeper the side rollers act as a blocking surface to prevent the risk of riding over the grinding belt and side rollers.

Further, since the stopper restricts the inward movement of the grinding belt in the width direction when the side roller returns to the normal position, excessive trajectory correction of the grinding belt is prevented. At this time, since the other side roller is stopped at the correct position by the stopper, it does not interfere with the above-mentioned trajectory correction.

Since the pair of side rollers are arranged near the pressing member that presses the grinding belt, even if the grinding belt is shifted while the grinding machine body is being moved laterally, the grinding belt can be immediately removed. The belt trajectory is corrected and meandering of the grinding belt is effectively prevented.

This effect is achieved whether the grinding belt is moving forward or backward.
Both are similarly exhibited, and a predetermined meandering prevention effect can be obtained.

Hereinafter, a preferred embodiment of the belt meandering prevention device in a mill roll grinding device according to this invention will be described with reference to the accompanying drawings.

The mill roll grinding device itself according to this embodiment is the same as the conventional example.

3 to 5 are views showing the main parts of a mill roll grinding device to which an embodiment of this invention is applied, in which FIG. 3 is a plan view, FIG. 4 is a side sectional view, and FIG. is a view taken along the line V-V in FIG. 3;

As shown in the figure, the belt meandering prevention device mainly consists of side rollers 11, 12 and a spring 10.

A pair of the side rollers 11 and 12 are provided on both ends of the grinding belt 4 in the belt width direction on the feed-out side and the wind-up side, spaced apart from the end of the belt in the normal position. In order to make belt trajectory correction more effective, these pair of side rollers 11, 11, 12, 12 are not placed near the guide rollers 9, 9 on the feeding side and winding side, but at the tip of the pressing member 7. It is provided near the side guide rollers 8, 8. The spring 10 also has a pair of side rollers 11, 11, 12, 12 to urge them inward in the belt width direction.
It is set up between 12.

As shown in FIGS. 6 to 8, the side rollers 11
is provided at one end of an arm 13 which is rotatably supported at one end and pivotable in a plane parallel to the surface of the grinding belt 4. This arm 13 has an axle support 14 at one end so that a pivoting moment is generated therein.
It has a substantially L-shape so as to be arranged to be offset from the center line O-O' of the side roller 11 in the belt traveling direction (forward in the belt traveling direction when not grinding). A stopper 16 provided on a frame 15 that pivotally supports the guide roller 8 so as to be able to adjust its forward and backward movement restricts the belt from turning inward in the width direction beyond a predetermined angle. In the illustrated example, this restriction angle is 0 degrees, that is, the arm 13 is only allowed to pivot outward in the belt width direction. On the other hand, the side roller 11 at the other end of the arm 13 has a shaft 17 provided at the other end of the arm 13 so that its roller surface faces the widthwise end of the grinding belt 4 at an arbitrary inclination angle. It is connected to the movement adjustment member 18, and is configured to be able to adjust the tilting movement of the grinding belt in the 4 directions on a plane that is perpendicular to the belt surface in the belt width direction. If the inclination angle of this side roller 11 is in the upright position, that is, 0 degrees, there is a risk of damaging the end of the grinding belt 4 or bending it and grinding the side roller 11; If it is close to 90 degrees, it is not possible to apply a turning moment to the arm 13, so in order to obtain the required turning moment while protecting the ends of the grinding belt 4, the roller shaft is moved outward from the inside in the width direction of the grinding belt. The opening is inclined at an angle of 45 degrees in the illustrated example. However, the inclination angle may be set depending on the width of the grinding belt.

Further, the spring 10 described above is provided at the other end of the arm 13 to urge the arm 13 inward in the width direction of the grinding belt 4 in order to return the rotated side roller 11 to the stopper 16 position. This spring 10 may be stretched directly between the arms 13, 13 which pivotally support the pair of side rolls 11, as shown in the example shown in FIG. , the other end is fixed at a predetermined position inward in the width direction of the grinding belt, and each arm 1
3 and 13 may be provided separately and independently.

This embodiment having the above configuration will be described.

First, assume that during grinding, an imbalance occurs in the grinding force in the width direction of the search belt 4, causing the grinding belt 4 to shift to one side. The off-centered grinding belt 4 hits and pushes one side roller 11 located on the off-centered side. When the side roller 11 is pushed, a turning moment is generated in the arm 13, and the arm 1
The arm 13, that is, the side roller 11 pivots around the shaft support 14 at one end of the arm 13 in the direction of shifting.
Since this rotation is made against the inward biasing force of the spring 10 in the belt width direction, the impact on the roller surface of the grinding belt 4 is absorbed in the process, and after the rotation is stopped, the side roller 11 is rotated by the spring 10. Since the grinding belt 4 tries to return, it is pushed by this and the grinding belt 4 is returned to the center. In this case, since the side roller 11 itself rotates around its axis due to contact friction with the end of the grinding belt 4, absorption of the above-mentioned impact is facilitated, and since the side roller 11 is inclined, the end of the grinding belt 4 Since it rides on the surface of the roller 11 and is gently curved, it does not bend and damage to the belt ends can be effectively prevented. Furthermore, when the end of the grinding belt 4 is applied to the side roller 11 as shown by the two-dot chain line in FIG. Because of the raised chevron shape, belt tensions in opposite directions are generated on both sides of the grinding belt 4 in the longitudinal direction centering on the side rollers 11, and the combined force of both belt tensions is directed downward, that is, the grinding belt is moved to the side. It acts in the direction of returning the roller 11 to its normal position. The orbit of the grinding belt 4 is corrected by the action of this belt tension and the rotation recovery effect of the spring 10. Furthermore, since the stopper 16 restricts the inward rotation of the side roller 11 in the belt width direction at the correct position when the side roller 11 returns, it is possible to prevent the trajectory of the grinding belt 4 pushed back by the side roller 11 from being excessively corrected. Moreover, even if the other side roller 11 receives tension via the spring 10 due to the outward rotation of the one side roller 11 in the belt width direction, it is stopped at the normal position by the stopper 16, so that the above-mentioned trajectory can be maintained. It does not impede correction.

Since such trajectory correction of the grinding belt 4 is performed individually by each pair of side rollers 11, 11, 12, and 12, the grinding force in the width direction of the grinding belt 4 becomes unbalanced, and the grinding Even if the belt 4 is offset to the left or right, this offset can be corrected, and belt meandering can be effectively prevented.

Next, during non-grinding, the grinding belt 4 moves in the opposite direction to that during grinding, but at this time as well, the grinding belt 4 is shifted due to the deviation of the grinding belt 4, as in the case of grinding.
When it hits the side roller 11, the spring 10
Since the arm 13 supported by the belt rotates and returns the grinding belt 4 while absorbing the impact, belt meandering can be effectively prevented. In particular, during non-grinding, unlike during grinding, the grinding belt 4 is moved rapidly, making it more prone to meandering. If the grinding belt 4 is set to contact the four ends, both ends of the grinding belt 4 will be pushed inward in the belt width direction, allowing immediate trajectory correction and ensuring belt meandering even during rapid feed. It can be prevented.

In this way, it is possible to effectively prevent the grinding belt 4 from meandering both during grinding and non-grinding, and to prevent uneven grinding and the unwinding and unwinding of the grinding belt 4 caused by belt meandering. .

In the above embodiment, the spring 10 is stretched inward in the belt width direction to provide tension to the arm 13, but the arm 13 is placed in the shaft support 14 at one end of the arm 13 inward in the belt width direction. A coil spring may be provided that biases the body.

In summary, this invention provides the following excellent effects.

(1) The arm moves the side roller away from the grinding belt in a plane parallel to the grinding belt, so it can cope with large deviations. The impact during this turning is absorbed by the return spring and the rotation of the side rollers around the roller axis.

(2) Since the side rollers are inclined outward in the width direction of the grinding belt from the inside to the outside, turning moment is applied to the arm without damaging the belt ends, and the grinding belt bends to grind the side rollers. This will prevent situations where this happens.

(3) When the end of the grinding belt rides on the side roller surface, the belt tension at that end acts in the direction to eliminate the riding condition, and along with this action, the spring force returns the side roller to its initial position. In order to return the grinding belt to the center, the trajectory of the grinding belt is effectively corrected from the large swing position of the arm to the stopper position.

(4) The angle of inclination of the side rollers relative to the surface of the grinding belt gradually increases as the arm rotates outward, and the greater the deviation, the steeper the blocking surface becomes. Exceeding danger is prevented.

(5) The position of each side roller is individually regulated by a stopper, and the trajectory correction of the grinding belt is performed independently on one side. That is, the side rollers that have not turned are at the stop position and do not interfere with the trajectory correction operation of the grinding belt by the side rollers that have turned.

(6) The pair of side rollers mentioned above are placed near the pressing member that presses the grinding belt, so even if the grinding belt shifts while moving the grinding machine body laterally, the grinding belt will immediately The trajectory is corrected and meandering of the grinding belt is effectively prevented.

(7) Since there is no restriction on the running direction of the belt, even if the grinding belt of the mill roll grinding device reciprocates between a pair of reels, the meandering prevention effect can be achieved in both forward and reverse directions.

(8) When the belt is being operated without meandering, the force exerted by the stopper to push the belt inward in the width direction is zero or slight, so even thin abrasive belts can cause wrinkles in the longitudinal direction. No worries.

(9) Therefore, the belt meandering prevention device of this invention is
In belt grinding equipment, the grinding belt is largely offset because the main body of the grinder is moved laterally while grinding, and belt meandering is inherently likely to occur.
This effectively prevents the grinding belt from running and makes it possible to smoothly grind the outer surface of the rolling roll online.

[Brief explanation of drawings]

Figures 1 and 2 are a plan view and a side sectional view of a general mill roll grinding device using a grinding belt;
FIG. 3 is a plan view showing a preferred embodiment of the belt meandering prevention device according to this invention, FIG. 4 is a side view, FIG. 5 is a view taken along the line V-V in FIG. 3, and FIG. 3 is an enlarged view of part A, FIG. 7 is an enlarged view of part C in FIG. 5, and FIG. 8 is an enlarged view of part B in FIG. In the figure, 1 is a rolling roll, 3 is a grinding machine body, and 4 is a rolling roll.
is a grinding belt, 5 and 6 are reels, 7 is a pressing member,
8 and 9 are guide rollers, 10 is a spring, 1
1 and 12 are side rollers, 13 is an arm, 14 is a shaft support, and 16 is a stopper arm.

Claims (1)

[Scope of Claim for Utility Model Registration] Grinding is carried out by moving the main body of the grinder horizontally while pressing and winding the grinding belt against the outer peripheral surface of the rolling roll, and when not grinding, the grinding belt is unwound while being separated from the rolling roll. In the grinding device for rolling rolls, these are erected on both widthwise ends of the grinding belt in the vicinity of the pressing member so that the roller surfaces thereof face and the roller shafts are inclined outwardly from the inside to the outside in the width direction of the grinding belt. A pair of side rollers provided as a roller and rotatably supported around the roller axis; An arm that supports the grinding belt so that it can be rotated freely in the direction of shifting the grinding belt around a point, a spring that urges these arms inward in the width direction of the grinding belt to return the rotated side rollers, and 1. A belt meandering prevention device for a mill roll grinding device, comprising a stopper that restricts inward rotation in the width direction of the grinding belt to a normal position when returning.