JPH0688045B2 - Vertical roller presser roll shifter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pressing roll shift device for a vertical edger.

[Prior art] Conventionally, when performing width reduction of a plate material in a vertical edger installed on the inlet side of a roughing mill or finishing mill of a hot strip mill, if there is no press roll, the plate width does not buckle within the limit. The amount of width reduction is limited, or the plate material is clamped from above and below by a press roll that is fixed in position in the plate width direction to improve the buckling limit and enable strong width reduction.

[Problems to be Solved by the Invention] However, since the press roll is simply fixedly arranged at the center position in the width direction of the plate material, when the plate thickness or the plate width of the plate material changes, the buckling occurs at the optimum position. Did not prevent the occurrence of.

Incidentally, when the plate width of the plate material is constant, the full width reduction amount can be expressed as ΔW = 0.5 to 1.0t, where t: plate thickness.

In view of such an actual situation, the present invention intends to reliably prevent buckling and increase the width reduction amount.

[Means for Solving the Problems] The present invention provides an upper pressing roll that presses the upper surface of a plate material to be width-reduced between left and right vertical rolls provided inside the housing through a pressure-reducing device so as to be width-reduced. , A plurality of pairs of lower pressing rolls for pressing the lower surface of the plate member are arranged in the width direction of the plate member, and each pressing roll is connected to a shift cylinder installed in the housing, and the expansion and contraction movement of the shift cylinder is performed. According to the present invention, there is provided a press roll shifting device for a vertical edger, wherein each press roll can be moved to any position in the width direction of the plate material.

[Operation] When the shift cylinder is expanded and contracted, the press rolls move to arbitrary positions in the plate width direction. The buckling limit of the plate material when the width is reduced can be improved by selecting the moving position of the press roll to a position where the plate material is easily buckled in accordance with the plate thickness and the plate width of the plate material.

[Examples] Examples of the present invention will be described below with reference to the drawings.

The figure shows a vertical edger equipped with a presser roll shifting device of the present invention, in which vertical rolls 3 and 3 supported by window boxes of upper and lower housings 1 and 2 are pushed down by mechanisms 4 and 4, respectively.
The vertical rolls 3 and 3 are arranged so that they can be moved toward and away from each other, and two sets of vertical pressing rolls 6 and 7 are arranged so as to sandwich the plate material 5 which is width-reduced by the vertical rolls 3 from above and below. A pressing cylinder 8 is connected to each upper pressing roll 6 so that the distance between the pressing rolls 6 and 7 can be adjusted according to the plate thickness, and the expanding and contracting motion of the pressing cylinder 8 causes the upper pressing roll 6 to move through the guide 9. The guides 9 are configured to be movable up and down, and the guides 9 are respectively connected to shift cylinders 10 installed in the upper housing 1 so that the upper pressing roll 6 can be moved in the plate width direction by the expansion and contraction of the shift cylinders 10. The lower presser roll 7 also has a lower housing 2
The shift cylinder 11 installed in the above is connected so that the shift cylinder 11 can also be moved in the plate width direction. The upper and lower presser rolls 6,7
At the same time, it is engaged with a movement guide (not shown) in the plate width direction.

In such a structure, when the shift cylinders 10 and 11 are expanded and contracted, the upper and lower presser rolls 6 and 7 are moved to arbitrary positions in the plate width direction. Therefore, when the plate material 5 is width-reduced by the vertical rolls 3, 3, by selecting the position to be clamped according to the plate thickness and the plate width of the plate material 5 as a position where the plate material 5 is easily buckled, It is possible to apply a strong reduction without causing buckling. That is, since the plate member 5 is clamped at a position close to the vertical roll 3, the buckling limit is improved and the width reduction amount can be increased, and the degree of freedom in setting the roll opening for improving the plate width accuracy is increased. . In other words, the unsteady part at the tip / tail end of the plate (several meters from the tip / tail end) has a peculiar shape (bachi-shaped, tapered tip) unlike the steady part (central part) in plastic flow during rolling with an edger and a mill. ) It is possible to make a strong reduction in order to prevent the correction width reduction.

By the way, when the plate material 5 is clamped at two places in the width direction, the total width reduction amount can be up to ΔW = 1.0 to 1.5 t, and the width reduction efficiency is much improved as compared with the conventional case where the plate material 5 is clamped at one central place.

In the above-mentioned embodiment, the case where the upper and lower presser rolls 6 and 7 are arranged at two places in the plate width direction is illustrated, but it may be three or more places, and other various changes are made without departing from the gist of the present invention. Of course you can get it.

[Effects of the Invention] As described above, according to the roll shift device of the vertical edger of the present invention, the upper and lower presser rolls are moved to the optimum position by the expansion and contraction movement of the shift cylinder in accordance with the plate thickness and the plate width of the plate material. Since it can be set, the buckling limit of the plate material can be improved and the width reduction amount can be increased as compared with the conventional case, which is an excellent effect.

[Brief description of drawings]

The figure is an illustration of an embodiment of the present invention. 1, 2 are housings, 3 are vertical rolls, 5 are plate materials, 6 and 7 are pressing rolls, 8 is a reduction cylinder, and 10 and 11 are shift cylinders.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Shibahara 1-3, Nishi-Nagasumotodori, Amagasaki-shi, Hyogo Sumitomo Metal Industry Co., Ltd. (56) Reference Japanese Patent Publication Sho 60-36841 (JP, B2)

Claims (1)

[Claims] 1. An upper pressing roll for pressing an upper surface of a plate material to be width-reduced and a lower surface for pressing a lower surface of the plate material between left and right vertical rolls provided inside the housing so as to be width-reduced by a pressing device. Plural pairs of pressing rolls are arranged in the width direction of the plate material, and each pressing roll is connected to a shift cylinder installed in the housing, and each pressing roll is expanded and contracted by the shift cylinder. A presser roll shift device for a vertical edger characterized in that it can be moved to any position in any direction.