JPS60221126A - Device for leveling strip - Google Patents

Abstract

PURPOSE:To remove easily a habitual bent of strip by arranging a deflecter roll which is workable for the relational movement in the advancing direction of a strip and having larger diameter than that of a work roll. CONSTITUTION:A strip 1 is passed through in the direction of an arrow B in waves shape among work rolls 2, 3, 4, 5 with a tension given in the direction of an arrow A, A'. A deflecter roll C having larger diameter is arranged on the upper flow side of a work roll 5 of the final step and a deflecter roll on the rear flow side. Then the larger-sized deflecter roll C of the upper flow side only is made movable in the direction of an arrow E. The strip 1 is bent in an alternate direction while passing through among work rolls and the distortions in longitudinal and lateral directions are leveled and finally the distortion remaining in the longitudinal direction is easily removed by the movement operation of the large- sized deflecter roll C.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for straightening and flattening the distortion of a metal strip, such as a long steel strip. Conventionally, as this type of device, the invention described in Japanese Patent Application Laid-open No. 71557/1983 is known. In the case of this invention, the metal strip plate is passed through a plurality of rolls in a wavy manner while applying tension, and one roll of each of the last two rolls is fixed. In order to remove the remaining longitudinal strain, there was an inconvenience that a wealth of experience and data was required for the operation of moving the two rolls. The present invention has been proposed with the aim of solving these inconveniences, and as stated in the claims above, the above-mentioned It is characterized by a deflector roll that can be moved relative to the work roll in the direction of movement of the metal strip and has a diameter larger than the work roll, so the structure is simple and there is only one roll to be moved. Operating the roll does not require much experience or data. Next, the features, functions, and effects of the present invention will be explained using examples. FIG. 1 shows an example of the essential parts of the steel strip straightening device according to the present invention, in which 1 indicates the steel strip, 2.3
．． 4.5 is a work roll for straightening, with arrows A and A on the steel strip 1.
The work rolls are passed in a wavy manner in the direction of arrow B while applying tension in the direction of /, and a deflector roll C with a diameter of approximately 100 is installed on the work roll 5 in the final stage, and a deflector roll is placed on the downstream side. It is characterized in that the rolls D are arranged and only the large diameter deflector roll C on the upstream side is movable in the direction of the arrow E. In this example, the strip 1 is bent in alternate directions while passing between the work rolls to correct longitudinal and widthwise strains, and finally the remaining longitudinal strains are removed by a large diameter deflector. It is easily removed by moving the roll C. For example, if an upward bend remains, moving the large-diameter deflector roll C closer to the work roll 4 will reduce the bending effect of the work roll 5 on the steel strip 1 and increase the bending effect of the work roll 4. Therefore, the upward curved line is immediately removed.

The principle of correcting this curved line is shown in Figure 2. G in Fig. 2 indicates the contact point between the steel strip 1 and the large-diameter deflation roll C, and H
is the contact point between the steel strip l and the work roll 5, and L is the contact point between the steel strip l and the work roll 5, and L is the contact point between the steel strip l and the work roll 5.
M is the displacement amount of the steel strip l determined by the positional relationship between both rolls, and θ is the approach angle of the steel strip 1 into the work roll 5, respectively. Correcting the crookedness of the steel strip 1 is carried out by changing the above-mentioned angle θ. The angle θ is determined by the M value and L value as shown in the formula below, and in conventional straightening machines for metal strips, the M value is changed, that is, the work roll 5 is moved vertically in FIG. I was doing everything I could to move.

However, in this vertical movement, a small amount of movement affects the bending of the steel strip 1, making it difficult to adjust the movement operation to obtain a satisfactory straightening effect.

The present invention makes this delicate adjustment possible by using a large-diameter deflector roll C.
This can be done by moving in the horizontal direction in FIG. That is, the L value is a value that is several ten times larger than the M value, and the bending effect of the work roll 5 can be finely adjusted.

FIG. 3 shows another embodiment of the present invention, and the example of FIG.
The movable deflector roll C is the final stage work roll 5
The difference is that it is installed on the downstream side. For this example,
Although only the bending effect of the work roll 5 in the final stage is utilized, the remaining curved wrinkles can be easily removed and it is advantageous in that the distance between the work rolls 4 and 5 can be reduced.

In addition, if the large-diameter deflector roll C is moved in the direction of arrow B in FIG. By performing the movement operation, only the bending effect of the work roll 5 can be exhibited without changing the bending effect of the work roll 4. In addition, in the example, an example in which deflector rolls are arranged on the upstream and downstream sides of the final stage straightening work roll has been described, but from the above explanation, it can be implemented in the same way for work rolls other than the final stage, and in that case. However, it can be seen that the effects of the present invention are not impaired in any way.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of essential parts of one embodiment of the present invention, FIG. 2 is an explanatory diagram of the principle of correction according to the present invention, and FIG. 3 is a schematic explanatory diagram of another embodiment. . l: Steel strip, 2, 3, 4, 5: Straightening work roll, A
, A/: an arrow indicating the direction of tension applied to the steel strip 1,
B: Arrow showing the traveling direction of the steel strip 1, C: Movable deflector roll, D: Fixed deflector roll, E: Arrow showing the moving direction of the movable deflector roll C. 2 people outside

Claims (1)

[Claims] In a device that corrects distortion by passing a metal strip continuously in a wavy manner between multiple stages of straightening work rolls while applying tension, at least on the upstream or downstream side of the final straightening work roll. A metal strip straightening device, characterized in that a deflector roll is disposed that can be moved in relation to the work roll in the traveling direction of the metal strip and has a diameter larger than the work roll.