JPS6327084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling apparatus for performing width rolling to finish a plate to a predetermined width at the stage of tentering rolling and finishing rolling in a thick plate rolling mill.

In recent years, even in thick plate rolling, efforts have been made to improve yields and improve product quality (higher precision) from the viewpoints of resource and energy conservation, and high precision efforts are being made to obtain a flat, rectangular rolled shape. Rolling technology and equipment are being researched.

However, in the past, width reduction was rarely performed at the stage of finish rolling, and even if it were carried out, sufficient reduction would only be possible at a relatively thick stage because buckling would occur in the rolled material a, as shown in Figure 1. However, if the plate thickness is thin, only a small amount of reduction can be applied, resulting in a significant drop in production efficiency. Furthermore, in the conventional method, when attempting to apply a large amount of width reduction, a dog bone b occurs at the width end of the rolled material a, increasing the amount of width return, and edge folding occurs at the width end due to width rolling. I had a problem.

The present invention has been made to solve the above-mentioned conventional problems, and includes edge presser rolls that can freely press and clamp the width ends of the rolled material from above and below at positions near the inner sides of the left and right vertical rolls. In addition, an intermediate part presser roll is provided in the intermediate part of the left and right vertical rolls, which can freely press and clamp the widthwise intermediate part of the material to be rolled from above and below, and the shafts of the end part presser roll and the intermediate part presser roll A buckling prevention device is constructed by arranging the center of the roll to be located on a plane connecting the axes of the left and right vertical rolls, and forming a cylindrical part on the vertical roll side of the end presser roll and having a truncated inner part. The present invention relates to a rolling device using vertical rolls, characterized in that a conical portion is formed, and the end presser roll is configured to be movable and adjustable in the width direction of the material to be rolled.

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

FIG. 2 shows an example of the present invention, in which end presser rolls 4 and 5 are provided near the inner sides of the left and right vertical rolls 1 and 2 so as to press the widthwise ends of the rolled material 3 from above and below. and a buckling prevention device comprising intermediate press rolls 10 and 11 provided on upper and lower housings 6 and 7 via roll stands 8 and 9 so as to support the rolled material 3 from above and below at the intermediate portion in the width direction. are provided, and each presser roll 4, 5,
10 and 11 can adjust and set the upper and lower intervals according to the thickness of the material 3 to be rolled, and each of the presser rolls 4, 5, 10, and 11 is connected to the vertical rolls 1 and 2. It is located on the line that connects the axes.

FIG. 3 shows the details of the end presser rolls 4 and 5, which support the vertical rolls 1 and 2 (only the vertical roll 1 side is shown in the drawing) and extend along the upper and lower housings 6 and 7. The upper and lower shaft boxes 12 of the frame 25 are supported movably in the width direction of the material 3 to be rolled.
A guide arm 14 is fixed through a key 13 inside the guide arm 14, and a hydraulic cylinder 15 is installed inside the guide arm 14.
The lower end of the rod of the hydraulic cylinder 15 is equipped with end presser rolls 4 and 5 which rotate with horizontal shafts and are positioned near the vertical roll 1 so as to sandwich the material 3 to be rolled from above and below. Attach via 16.

The end presser rolls 4, 5 have a profile with a cylindrical section 17 on the outside and a frustoconical section 18 on the inside. In the figure, 19 is a reduction screw, 20 is a balance cylinder, and 21 is a coupling that connects the shaft 23 of the vertical roll 1 to the drive spindle 22.

In the rolling apparatus having the above configuration, the material to be rolled 3 is moved between the end presser rolls 4, 5 and the intermediate presser roll 1.
By performing the edging while clamping the rolled material 3 from the upper and lower surfaces at angles of 0 and 11, buckling of the rolled material 3 can be prevented. Also, at this time, the vertical rolls 1 and 2 and the presser rolls 4, 5, 10, and 11 are
Since it is arranged so that its axis is located within one plane, it is more effective in preventing buckling.

Further, the positions of the vertical rolls 1 and 2 and the end presser rolls 4 and 5 are adjusted in the sheet width direction by the reduction screw 19 and the balance cylinder 20, and the upper and lower mutual intervals of the end presser rolls 4 and 5 are adjusted by the hydraulic cylinder 15. By adjusting the position, the edges of the material to be rolled 3 are rolled down diagonally using the truncated conical portions 18 of the end presser rolls 4 and 5 to perform chamfer rolling, as shown in FIG. Can be done. Therefore, tenter rolling can be easily performed as shown in FIG. 6 without causing edge folding as shown in FIG.

In addition, as shown in FIG. 7, end presser rolls 4, 5
By using the cylindrical portion 17, it is possible to prevent the occurrence of dog bones during width reduction, and by rolling the dog bones caused by width reduction during finish rolling to make the plate uniform, width return after rolling can be reduced. It can be made smaller. Further, FIG. 8 shows an embodiment in which the vertical rolls 1 and 2 are provided with large diameter portions 24.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and although the case where the end presser roll is attached to the axle box of the vertical roll so as to move together with the vertical roll has been described, it is not limited to the above embodiment. The invention may be constructed so that it can be moved in the width direction of the material to be rolled, and various means for changing the clamping position (force) of each presser roll relative to the material to be rolled may be employed, without departing from the gist of the present invention. Of course, various changes can be made within the scope.

According to the above-described rolling apparatus using vertical rolls of the present invention, the following excellent effects can be achieved.

(i) By clamping the material to be rolled with the end presser roll and the intermediate presser roll, which are positioned on the plane connecting the axes of the left and right vertical rolls,
Backling of the material to be rolled can be effectively prevented and a large width reduction is possible, so production efficiency can be improved.

(ii) The truncated conical portion of the end presser roll can perform chamfer rolling on the edge portion of the material to be rolled, and can prevent the edge from being folded in during tentering rolling.

(iii) The cylindrical portion of the end presser roll eliminates dog bones in the material to be rolled, thereby reducing width return after rolling.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of buckling and dogbone generated by width reduction, Fig. 2 is an explanatory front view showing an example of the device of the present invention, and Fig. 3 is an explanatory cutting showing an end presser roll and its mounting structure. Front view, 4th
The figure is an explanatory diagram showing the state of chamfer rolling of the rolled material.
The figure is an explanatory diagram showing the folded state of an edge. Figure 6 is an explanatory diagram showing a state in which edge folding does not occur when chamfering is performed using the apparatus of the present invention. Figure 7 is a diagram showing a rolling state in which dog bones are eliminated from the rolled material. FIG. 8 is an explanatory diagram showing another embodiment of the present invention. 1 and 2 are vertical rolls, 3 is a material to be rolled, 4 and 5 are end press rolls, 6 and 7 are upper and lower housings, 10,
11 is an intermediate presser roll, 12 is an axle box, 14 is a guide arm, 15 is a hydraulic cylinder, 17 is a cylindrical part, 18 is a truncated conical part, and 19 is a reduction screw.

Claims (1)

[Claims] 1 An end presser roll is provided near the inner side of the left and right vertical rolls, which can freely press and clamp the width end of the material to be rolled from above and below, and a width end of the material to be rolled is provided at an intermediate portion between the left and right vertical rolls. An intermediate part presser roll is provided that can freely press and clamp the intermediate part from above and below, and the axes of the end part presser roll and the intermediate part presser roll are located on a plane connecting the axes of the left and right vertical rolls. A buckling prevention device is constructed by arranging the end presser roll to form a cylindrical part on the vertical roll side and a truncated conical part on the inner side, and A rolling device using vertical rolls, characterized in that the position can be adjusted in the width direction of the material.