JPH0270322A - Tension leveler - Google Patents

Abstract

PURPOSE:To easily determine a suitable intermesh to reduce a camber to zero to obtain a flat sheet by providing a roll leveler for correcting camber on the down stream of a bridle roll the outlet side. CONSTITUTION:Roll levelers 4, 5 to straighten the camber are provided on the downstream side of the bridle roll 2 of the outlet to straighten the camber in the lengthwise direction of a plate and in the width direction of a plat and in the width direction of the plate. This roll leveler to straighten the camber is composed of an upper roll group 4 and a lower roll group 5 which are arranged zigzag to give a steel plate 6 repeated bevding. The repeated bending strength given to the steel plate 6 is reduced toward the outlet to straighten the camber of the steel plate 6 by using the tiling draft system that the intermesh in the inlet is large and becomes gradually small toward the outlet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tension leveler used for tension straightening of thin steel plates.

[Conventional technology]

Figure 2 shows an example of the structure of a conventional tensile cage for straightening thin plates. This generates high tension by creating a speed difference in the peripheral speed of the inlet bridle roll 1 and the exit bridle roll 2, and the elongating roll group 3 and the warp correction roll group 7 are arranged between them. It has a structure. When the steel plate 6 is subjected to strong bending by the stretching roll group while tension is applied to the steel plate 6, the difference in elongation in the plate length direction in the plate width direction is corrected. However, since strong bending is applied here, warpage occurs in the steel plate 6 not only in the longitudinal direction of the plate but also in the width direction of the plate. Therefore, the warp is removed by a warp correction roll group 7 installed behind the elongation roll group 3, and a flat plate is obtained.

[Problem to be solved by the invention]

In the conventional tension blind leveler, the warpage correction roll group 7
is installed between the group 1.2 of the 9 rolls of prites on the outgoing side, and corrects warping under high tension. Under high tension, the board may remain warped even though it appears flat, and since the warp is different compared to when the tension is released, the board may be warped again after exiting the exit bridle roll 2. This makes it difficult to determine the amount of intermeshing (the amount of roll pushing) that will eliminate warping in actual operation.

In addition, the warpage correction roll group 7 is usually composed of two units, and since the warpage changes greatly due to a slight deviation of the intermeshing, it costs a lot of money to determine the appropriate intermeshing in actual operation. It takes time.

Furthermore, the line speed is about 1000m/min.
Because of the high speed, slight slippage occurs between the steel plate 6 and the roll. As a result, problems such as vibration, wear, and seizure occurred in the roller leveler.

[Means to solve the problem]

In order to solve the above-mentioned conventional problems, the present invention is for straightening the shape of a thin plate, and is provided with a warp-correcting row 2 leveler downstream of the exit bridle roll, and the warp-correcting roller leveler comprises a plurality of rolls. The purpose of the present invention is to propose a tensile type railer characterized in that the plurality of rolls are arranged in a staggered manner in the upper and lower directions, and the amount of roll pushing becomes smaller toward the downstream side.

[For production]

In the present invention, since the roller leveler for warp correction is installed downstream of the exit bridle roll, that is, under low tension, the warp can be easily corrected. Setting the intermesh of this roller leveler is relatively easy compared to the case where it is installed under high tension, and even if the intermesh is slightly changed, the warpage does not change significantly.

〔Example〕

FIG. 1 shows the structure of an embodiment of the present invention. High tension is generated in the steel plate 6 by creating a speed difference between the peripheral speeds of the inlet ply roll 1 and the outlet bridle roll 2. Extension roll group 3 between this priddle 1.2 on the outgoing side
By applying strong bending under high tension, strain differences in the length direction of the plate are eliminated. A roller leveler 4.5 for correcting warpage is provided downstream of the exit bridle roll 2.

To correct warpage in the length direction and width direction of the board caused by strong bending by the elongating roll group 3. This warpage correction roller repeller has a structure in which an upper roll group 4 and a lower roll group 5 are arranged in a staggered manner in the upper and lower directions to repeatedly bend a steel plate 6. By using a tilting reduction method in which the intermesh is large on the inlet side (upper filly) and gradually becomes smaller toward the outlet (downstream side) K, the strength of repeated bending applied to the steel plate 6 is increased. is made smaller toward the exit side, and the warpage of the steel plate 6 is corrected. In this embodiment, since the warpage correction roller 4.5 is installed downstream of the exit bridle roll 2, the 4-
Problems such as vibration, wear, and seizure do not occur on the leveler. In addition, since the warp is corrected under low tension, the warp on the exit side of the roller leveler 4.5 for warp correction is almost the same as that when the tension is released. Information can be immediately fed back to the roller leveler interface. As described above, this embodiment has a simple structure, and a flat plate can be obtained only by operating the intermeshes of the elongating rolls and the warp correction row 2 leveler.

〔Effect of the invention〕

According to the present invention, when the warpage of a thin steel plate is corrected in actual operation, it is possible to easily determine an appropriate intermeshing that eliminates the warpage, and a flat thin sheet can be obtained. Also, vibration and wear of Roller Ray 2.

Burn-in is suppressed.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view showing the structure of an embodiment of the present invention, and FIG. 2 is an explanatory view showing the groove structure of an example of a conventional tensile strength leveler. l... Entry side bridle roll 2... Outgoing bridle roll 3... Extension roll group 4... Roller leveler for warping correction Upper roll group 5... Roller leveler for warping correction 4 Lower roll group 6... Steel plate 7... Warp correction roll group

Claims (1)

[Claims] In a device that corrects the shape of a thin plate, a warp correction roller leveler is provided downstream of the exit bridle roll, and the warp correction roller leveler is provided with a plurality of rolls, and the plurality of rolls are arranged in a staggered manner up and down, and the amount of roll pushing is adjusted. A tension leveler characterized by being arranged so that it becomes smaller as it goes downstream.