JPH0344323Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vertical rolling mill that is capable of selecting a presser roll of optimum length in accordance with the width of the strip plate to be rolled. .

[Conventional technology]

Generally, when a vertical rolling mill is installed between the stands of a finishing rolling mill to reduce the width of the strip, the width is reduced by pressing the strip with upper and lower presser rolls.
This is to prevent buckling of the strip.

[Problem that the invention attempts to solve]

However, in this conventional method, if presser rolls of different lengths are selected depending on the width of the strip, the work of changing the rolls becomes complicated and the transfer ratio decreases. The strip is held down by a presser roll having the same diameter, and therefore there is a problem in that buckling cannot be effectively prevented due to the width of the board.

The present invention was developed in view of the above-mentioned circumstances, with the object of making it possible to select a presser roll with a length corresponding to the width of the strip plate without having to perform complicated presser roll replacement work.

[Means for solving problems]

The present invention consists of left and right vertical rolls for reducing the width of the strip, and at least one of the upper and lower rolls disposed between the vertical rolls, which can be raised and lowered and rotated in a direction parallel to the strip traveling direction D when viewed from above. It has a structure including a frame having the above structure and a plurality of presser rolls having different lengths disposed on the frame.

[Effect]

Therefore, in the present invention, by rotating the frame body, a presser roll having an optimum length corresponding to the width of the strip is selected, and the strip is pressed down by the presser roll during width reduction.

〔Example〕

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

1 to 3 are explanatory diagrams of an embodiment of the present invention.

Vertical roll shaft boxes 3 and 4 which are slidable in the strip width direction are arranged in the upper and lower horizontal housings 1 and 2, and a vertical roll 5 is rotatably supported by the vertical roll shaft boxes 3 and 4, The roll gap of the vertical rolls 5, 5 can be adjusted by the reduction screws 6, 7 via the vertical roll shaft boxes 3, 4.

A support frame 9 is attached to the lower end of a rod 8 that allows the horizontal housing 1 to be raised and lowered by a suitable lifting drive device 15 such as a hydraulic cylinder attached to the horizontal housing 1. A shaft 17 is rotatably attached to a bearing 18 attached to the upper frame 10, which is rotatable in a direction parallel to the strip traveling direction D when viewed from above.
A gear 12 is connected to the output shaft of a motor 11 disposed on the support frame 9 via a coupling, a gear 13 fixed to the shaft 17 is meshed with the gear 12, and a strip width is set on the upper frame 10. Upper presser rolls 14-1, 14-2 having different lengths in different directions,
14-3 and 14-4 are installed rotatably. Upper press roll 14-1, 14-2, 14-3, 14-
If the length of 4 is ₁ , ₂ , ₃ , ₄ , then for example ₁
< ₂ < ₃ < ₄ .

Similar to the upper press roll side, a bearing is attached to a fixed support frame (not shown) attached near the horizontal housing 2, a shaft 19 is rotatably fitted to the bearing, and a lower frame is attached to the shaft 19. The shaft 19 is fixed to the shaft 16 by a motor (not shown) disposed on the support frame.
so that the lower frame 16 can be rotated in a direction parallel to the strip traveling direction D when viewed in plan,
Lower presser rolls 20-1, 20-2, 20- each having different lengths in the strip width direction are provided on the lower frame 16.
3. Attach 20-4 so that it can rotate freely. If the lengths of the lower presser rolls 20-1, 20-2, 20-3, and 20-4 are ₁ , ₂ , ₃ , and ₄ , for example _{, 1} < _2.
< ₃ < ₄ . Further, the upper and lower presser rolls are arranged in pairs with the same length so as to be able to press the strip 21.

In the case of width reduction of the strip 21, the gap between the vertical rolls 5 and 5 is adjusted by the reduction screws 6 and 7 via the vertical roll shaft boxes 3 and 4 to match the strip width on the entry side, and the motor 11 etc. are driven. and the upper and lower frames 10,
16, select upper and lower presser rolls of a predetermined length corresponding to the width of the strip plate, lower the upper presser rolls via the rod 8, press the strip 21 with the upper and lower presser rolls, and then press the strip 21 onto the vertical roll 5.
Reduce the width by Since the upper and lower presser rolls can be selected to have the optimum length according to the strip width, buckling can be effectively prevented. For example, when the widths of the strips 21 are W ₁ , W ₂ , W ₃ , and W ₄ , W ₁ <W ₂
<W ₃ <W ₄ , the strip of width W ₁ is pressed by the upper and lower press rolls 14-1, 20-1, the strip of width W ₂ is pressed by the upper and lower press rolls 14-2, 20-2, and the strip of width W ₃ is The strip is made of upper and lower presser rolls 14-3,
20-3 and a strip having a width W ₄ are pressed down by upper and lower press rolls 14-4 and 20-4, respectively, to reduce the width.

In the embodiment of the present invention, the upper and lower frames that rotatably support the upper and lower presser rolls are both turret-type so that they can rotate, but only one of the upper and lower frames is turret-type, and the opposite side is a frame. The explanation has been given of the case where the body can be fixed and used as one type of presser roll, and the upper presser roll of the upper and lower presser rolls is raised and lowered, but it is also possible that both the upper and lower presser rolls can be raised and lowered, or Of course, only the lower presser roll may be moved up and down, and various other changes may be made without departing from the gist of the present invention.

[Effect of idea]

According to the vertical rolling mill of the present invention, the optimal length of the presser roll can be selected according to the width of the strip at the entrance of the vertical rolling mill, resulting in stable width reduction without buckling from narrow to wide strips. This has the excellent effect of making it possible.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG. 2 is a perspective view of the same as shown in FIG. 1, and FIG. 3 is a plan view of FIG. 1. In the figure, 5 is a vertical roll, 10 is an upper frame body, 14-
1, 14-2, 14-3, 14-4 are upper press rolls, 16 is a lower frame body, 20-1, 20-2, 20
-3 and 20-4 indicate lower press rolls.

Claims (1)

[Scope of utility model registration request] Vertical rolls on the left and right that reduce the width of the strip,
A frame disposed between the vertical rolls and capable of raising and lowering at least one of the upper and lower sides and rotating in a direction parallel to the direction in which the strip travels when viewed from above, and a length disposed on the frame. A vertical rolling mill characterized in that it is provided with a plurality of presser rolls having different pressure rolls.