JPS6331285B2 - - Google Patents

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, a metal strip plate is passed between multiple stages of rolls in a wavy manner while applying tension, and each of the last two rolls can be moved in the vertical direction, and the roll next to it can be moved in the vertical direction. Since it is characterized by being fixed, there is an inconvenience that a wealth of experience and data is required for moving the two rolls in order to remove the residual longitudinal strain at the end. The present invention was proposed with the aim of solving these inconveniences, and as described in the claims above, at least on the upstream side or downstream side of the final stage straightening work roll,
A deflector roll is disposed that is movable in relation to the work roll in the direction of movement of the metal strip and has a larger diameter than the work roll,
Since 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. It is passed between the work rolls in a wavy manner in the direction of arrow B while applying tension in the direction of A', and a large diameter deflector roll C is placed on the upstream side of 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 curve is immediately removed.

The principle of correcting this crookedness is shown in Figure 2. Second
In the figure, G indicates the contact point between the steel strip 1 and the large-diameter deflation roll C, H indicates the contact point between the steel strip 1 and the work roll 5, and L indicates the distance between the centers of both rolls (pitch).
, M indicates the displacement amount of the steel strip 1 determined by the positional relationship between both rolls, and θ indicates the approach angle of the steel strip 1 into the work roll 5, respectively. The bending of the steel strip 1 is corrected by changing the angle θ. The angle θ is determined by the M value and the L value as shown in the formula below, and in conventional metal strip straightening machines, the M value is changed, that is, the work roll 5
This was carried out by moving in the vertical direction in FIG.

θ=tan ^-1 L/M However, in this vertical movement, a small amount of movement affected the bending of the steel strip 1, making it difficult to adjust the movement to obtain a satisfactory straightening effect. .

In the present invention, this delicate adjustment is made possible by moving the large-diameter deflector roll C in the horizontal direction in FIG. That is,
This is used to change the L value, which is several ten times larger than the M value, and allows the bending effect of the work roll 5 to be finely adjusted.

FIG. 3 shows another embodiment of the present invention, which differs from the example shown in FIG. 1 in that a movable deflector roll C is installed downstream of the final stage work roll 5. FIG. In this example, only the bending effect of the work roll 5 in the final stage is utilized, but the remaining bends are easily removed and the work roll 4
This is advantageous in that the distance between and 5 can be reduced. Furthermore, the first
In the figure, if the large-diameter deflector roll C is moved in the direction of arrow B, in other words, the large-diameter deflector roll C is moved in a direction that does not change the advancing angle of the steel strip 1 with respect to the work roll 4. For example, 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 embodiment, the deflector rolls were arranged upstream and downstream of the final stage straightening work roll, but from the above explanation, the same method can be applied to work rolls other than the final stage.
It can be seen that even in this case, 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 the main parts of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the principle of correction according to the present invention,
FIG. 3 is a schematic illustration of another embodiment. 1... Steel strip, 2, 3, 4, 5... Work roll for straightening, A, A'... Arrow indicating the direction of tension applied to the steel strip 1, B... Arrow indicating the traveling direction of the steel strip 1, C
...Movable deflector roll, D...fixed deflector roll, E...arrow indicating the moving direction of movable deflector roll C.

Claims (1)

[Claims] 1. 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 the upstream side or downstream side of the final stage 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 larger diameter than the work roll.