JPH0225207A - Belt type grinding device for rolling roll - Google Patents

Abstract

PURPOSE:To obviate a belt double bend and a belt rupture of a roll grinding device by facilitating a displacement in the width direction of a belt and measuring a pressure distribution and the displacement quantity in that case. CONSTITUTION:A roll 1 is ground by pressing a grinding belt 3 against the surface of the rolling roll 1 by a pressing member 6 to which prescribed pressure has been applied. By pressing ununiformly the pressing member 6 by a pressing force adjusting means, a displacement in the width direction of the grinding belt 3 and a variation of its pressure distribution are executed easily. This pressure distribution and the displacement quantity are measured by pressure detecting sensors 12A, 12B and position detecting sensors 14A, 14B. In such a way, a belt double bend and a belt rupture of the roll grinding device can be obviated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a belt-type grinding device for rolling rolls, and in particular to a rolling mill that can prevent meandering of the grinding belt without making major changes to the grinding device. This invention relates to a belt-type grinding device for rolls.

[Conventional technology]

-G, as rolling progresses, the outer circumferential surface of the roll in the rolling mill that comes into contact with the material to be rolled wears out, resulting in rough skin, and local wear is particularly significant at locations corresponding to the edges of the material to be rolled. It is necessary to periodically grind the outer peripheral surface of the roll. However, in the past, the rolling rolls were removed from the rolling mill body and the grinding work was performed off-line, which required a great deal of effort and time. In addition, this grinding was performed using a rotary whetstone, but since a rotary whetstone is easily clogged, dressing (removal of clogs) is often required, and it takes a long time to grind the rolls. there were.

Therefore, in order to solve these problems, we have developed
A grinding device has been proposed in Publication No. 156507 (No. 7
(see figure).

As shown, this equipment is a rolling roll (work roll)
The main body 2, which is supported adjacent to the roller 1 so as to be able to move in parallel in the axial direction of the roll, is provided with a feed reel 4 and a take-up reel 5 for the grinding belt 3. The pressing member 6 applies a predetermined pressure to the folded part 3a of the grinding belt 3, and the rolling roll l, which is the object to be ground, is
It slides into contact with the outer circumferential surface of the machine and traverses at a predetermined speed to enable online grinding.

However, when the above-mentioned device is installed in the housing of the mill roll 1, as shown in FIG. The range of parallel movement is regulated. Therefore, when performing continuous traverse grinding over the entire length of the rolling roll 1 using a grinding belt with a constant width, the sliding contact time with the grinding belt 3 at both ends of the rolling roll 1 is equal to that of the other long parts. There was a problem in that a taper portion remained uncut.

In addition to the above-mentioned problems with the device, there are also problems caused by the unique grinding characteristics of the grinder main body in the belt width direction. That is, due to unavoidable factors such as defects due to various structural causes of the pressing member 6 and the grinding belt 3, or partial differences in grinding performance in the belt width direction, the rolling roll 1
There was a problem in that uneven grinding was performed not only at both ends but also at the middle part.

Therefore, in order to solve this problem, JP-A-60-23
Publication No. 1512 discloses a method for adjusting the pressing force to change the pressure distribution in the belt width direction by tilting or bending the pressing member in the pressing direction in order to correct the inherent non-uniform grinding characteristics in the belt width direction that the above-mentioned grinding device has. A grinding device provided with means has been proposed.

[Problem to be solved by the invention]

However, in the improved conventional technology as described above,
By tilting or bending the pressing member in the direction of the pressing force to change the pressure distribution in the belt width direction, meandering of the grinding belt is likely to occur, and the meandering that occurs can be removed by grinding, winding,
The problem gradually increases during repeated rewinding, and eventually, when the ends that are deviated in the width direction are wound onto a reel, they fold over each other, resulting in a double layer, or the belt breaks due to excessive tension when folded over. was there. Therefore, as a means to prevent the grinding belt from meandering, the belt tension may be increased between the feed reel and the pressing member, or the platen roll 13 shown in FIG. Attempts have been made to provide a crown to prevent the device from coming off, but the meandering prevention effect is not sufficient for the above device, and a more effective meandering control method has been desired.

The present invention has been made in view of the problems with the conventional apparatus, and solves the above problems by providing a means for pressing the pressing member unevenly and changing the pressure distribution against the rolling roll in the width direction of the grinding belt. The purpose is to solve problems.

[Means for Solving the Problems] The present invention provides a belt-type grinding device that presses a grinding belt against the surface of a rolling roll with a pressing member applying a predetermined pressure to grind the rolling roll surface. The pressing force adjusting means changes the pressure distribution on the rolling roll in the width direction of the grinding belt by pressing the pressure sensor on both sides of the pressing member to detect the pressure distribution in the width direction of the grinding belt, and the This is a belt-type grinding device for rolling rolls that is equipped with a position detection sensor that detects the position of a pressing member.

[Effect]

Since the present invention is configured as described above, when the grinding heald shifts to one side of the pressing member during grinding, the pressure change applied to one pressing member is detected by the pressure detection sensor, and the pressure at that time is detected by the pressure detection sensor. While detecting the position of the member with a position detection sensor, by pressing one side of the pressing member from the back side and tilting the pressing member, the grinding belt that is biased toward the one side is aligned and grinding is performed at a predetermined position. It can be carried out.

〔Example〕

The present invention will be explained below based on the drawings. 1 to 6 are diagrams showing one embodiment of the present invention.

As shown in FIGS. 1 and 2, a pressing member 6 is provided at the tip of the grinding machine body 2 to press the grinding belt 3 against the surface of the rolling roll 1 with a predetermined pressure.

This pressing member 6 is formed to be approximately the same width as the grinding belt 3 or slightly wider, and the central rear surface of the pressing member 6 in the roll axis direction has a pressing force so that the surface pressure against the surface of the rolling roll 1 can be constant. It is rotatably supported by a pin 9 on a pressing rod 8 that moves forward and backward in the direction. Further, on both ends of the head plate 7 of the pressing rod 8 extending along the longitudinal direction of the pressing member 6, it is possible to individually press and displace either rear surface of both longitudinal ends of the pressing member 6. A pressing force adjusting means 80 is provided.

That is, hydraulic jacks 11A and 11B are provided at both ends of the head plate 7, and the piston rod 1
By moving 0A and 10B back and forth, a required pressing force is applied to the back surface of the pressing member 6, and by moving the pressing loft 8 back and forth, the required amount of displacement and pressure distribution in the longitudinal direction of the pressing member 6 are applied. There is. Further, 12A and 12B are pressure detection sensors for detecting the pressing force of the piston rods 10A and 10B against the back surface of the pressing member 6 based on the reaction force, and 14A and 14B are pressure detection sensors for the piston rods IOA and I
This is a position detection sensor that measures the amount of displacement of the OB, and is attached to the hydraulic jacks IIA and 11B.

Next, the effect of preventing meandering during winding and unwinding of the grinding belt 3 in the above configuration will be described.

Now, as shown in FIG. 3, when the pressing member 6 and the head plate 7 are in a parallel state, if the grinding belt 3 meanders to the left side of the pressing member 6 in the figure (this is referred to as side A), the pressure The detection sensor 12A shows a larger value than the detection sensor 12B via the piston rod lOA. In other words, the difference between the amount of deviation from the center of the grinding belt 3 and the pressure difference between the repressure detection sensor (
12A-12B) is indicated by X in FIG.

Since it is shown on the Y axis, the amount of deviation can be detected.

Therefore, in order to align the grinding belt 3 that is biased toward the A side, pressurize (advance) the pressing member 6 with the piston rod IOA (see Figure 5), and the belt 3 will move toward the B side (arrow B). The meandering is corrected.

Further, it is assumed that the relationship between the pressure detection sensors 12A, 12B and the piston rod position detection sensors 14A, 14B at a certain point in time is shown by point A in FIG. In other words, when the piston rod IOA is moving forward from IOB and the grinding belt 3 is still biased towards the A side (Fig. 5), when the piston rod IOA is further moved forward, the point A will follow the path of the curve Q. As if moving, the belt 3 moves to the B side,
When the zero point is reached, the meandering of the grinding belt 3 can be controlled by returning the piston rods IOA and 10B to the same position (zero point).

〔Effect of the invention〕

As explained above, according to the present invention, by using means for facilitating displacement in the belt width direction and measuring the pressure distribution and displacement amount at that time, It becomes possible to easily prevent the grinding belt from meandering easily, and it is possible to obtain the effect that problems such as two-piece bending and belt breakage caused by the grinding belt meandering can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal partial sectional view of the tip of the embodiment, Fig. 2 is a plan view of the main part of the embodiment, Fig. 3 is a plan view of the main part showing the state in which the grinding belt is offset in Fig. 2, and Fig. 4 5 is a diagram showing the relationship between the belt meandering amount and the differential pressure of the pressure detection sensor when the pressing member and the head plate are parallel, FIG. 5 is a partial plan view of the embodiment when one hydraulic jack is activated, and FIG. Fig. 6 is an explanatory diagram of the state in which point A is corrected, indicating the condition of the offset position of the grinding belt at a certain point in time, Fig. 7 is a vertical partial cross-sectional view of the tip of the conventional example, and Fig. 8 shows the results of conventional roll grinding. FIG. ■...Rolling roll, 3...Grinding belt, 6...Press member, 7...Head plate, 8...Press lot , 12A, 12B...
...Pressure detection sensor, 1.4A, 14B...
・Position detection sensor. Patent applicant Kawasaki Steel Corporation Ishikawajima Harima Heavy Industries Co., Ltd. Agent Patent attorney Tetsuya Mori

Claims (1)

[Claims] (1) In a belt-type grinding device that presses a grinding belt against the surface of a rolling roll with a pressing member applying a predetermined pressure and grinds the surface of the rolling roll, the pressing member is pressed unevenly in the pressing direction to roll the grinding belt in the width direction. Pressure detection sensors for detecting the pressure distribution in the width direction of the grinding belt are provided on both sides of the pressing member as the pressing force adjusting means for changing the pressure distribution on the roll;
A belt-type grinding device for rolling rolls, comprising a position detection sensor that detects the position of the pressing member with respect to a head plate of a pressing rod.