JPH0318001Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a rolling mill that is equipped with an intermediate roll, a support roll, and a horizontal bending device in parallel with a work roll, and more specifically, a rolling mill that is equipped with an intermediate roll, a support roll, and a horizontal bending device. This relates to a structure that allows easy implementation.

[Prior Art] Conventionally, as shown in FIG. 4, one of the upper and lower work rolls a and b, the upper work roll a in the figure, is formed to have a smaller diameter and the upper work roll a is offset in the rolling line direction. At the same time, an intermediate roll c, a support roll d, and a horizontal bending cylinder e are provided in parallel with the upper work roll a, and by operating the horizontal bending device e, the support roll d is connected to the upper work roll a via the intermediate roll c.
A rolling mill has been developed in which the upper work roll a is pressed against the upper work roll a to apply horizontal bending, and the vertical roll crown of the upper work roll a is corrected by this horizontal bending.

[Problems to be solved by the invention] Therefore, in such a rolling mill, roll exchange,
Especially when replacing support roll d, support roll d
d to the outside of the window width, and then pull out the support roll in the roll axis direction.
The work was extremely troublesome because it had to be pulled out in the line direction using a recombining device or the like.

Furthermore, since the support roll d is once retracted to the outside of the window width, the stroke of the cylinder e is required to be long, which has the disadvantage that the cylinder e becomes larger than necessary.

The present invention allows for easy replacement of support rolls.

[Means for Solving the Problems] The present invention provides a rolling mill that is sequentially equipped with an intermediate roll, a support roll, and a horizontal bending device in parallel with a work roll, in which the intermediate roll is engaged with an axle box of the work roll, Further, the support roll and the horizontal bending device are configured to be detachable, and the support roll is configured to be engageable with an axle box of a backing roll that supports the work roll.

[Operation] Therefore, the work roll and intermediate roll, as well as the support roll and backing roll, are pulled out together in the roll axis direction.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, the upper work roll 1
has a small diameter, the lower work roll 2 has a large diameter, an upper support roll 3 is arranged above the upper work roll 1, and a lower support roll 4 is arranged below the lower work roll 2,
The shaft ends of the upper and lower holding rolls 3 and 4 are rotatably supported by shaft boxes 6 and 7 incorporated into the housing 5, and the shaft end of the lower work roll 2 is also rotatably supported by the shaft box 8 incorporated into the housing 5. Further, the lower portions of both ends of the upper backing roll shaft box 6 in the rolling line direction are extended downward to form leg portions 9, 9, and the shaft end of the upper work roll 1 is rotated between the leg portions 9, 9. The axle box 10 that is freely supported is engaged so as to be embraced. Further, an intermediate roll 11 is provided in parallel to and in contact with the upper work roll 1 at a position downstream of the upper work roll 1 in the rolling line direction, and a guide portion 13 is provided for the bearing 12 of the intermediate roll 11 inside the upper work roll axle box 10. are slidably engaged in the direction of the rolling line.

A casing 14 is fixed between the inner surfaces of the left and right (width direction) housings 5, 5, and to the casing 14,
A plurality of hydraulic cylinders 16 as horizontal bending devices that allow the piston rods 15 to move forward and backward in the rolling line direction are arranged at required intervals in the rolling mill width direction (sometimes there is only one position), and each piston rod 15 A support bracket 17 is connected to the tip of the support bracket 17. A U-shaped groove is provided at the tip of each support bracket 17, and an axis 1 parallel to the work roll 1 above each groove.
The shaft 18 is supported by the groove edge, and clamps 20 for gripping the shaft 18, which are opened and closed by a fluid pressure cylinder 19, are pivotally attached to the support brackets 17 located at both ends, as shown in FIG. In addition, each support bracket 17 is provided with a split support roll 21 rotatably mounted on the shaft 18. Further, both ends of the shaft 18 are slidably engaged with a guide member 22 provided inside the leg portion 9 of the upper backing roll shaft box 6 in the rolling line direction, and a stopper 2
3, so that it can be fixed.

In the rolling mill configured as described above, cylinder 1
When the piston rod 15 of 6 is extended, the corresponding support roll 21 presses on the upper working roll 1 via the intermediate roll 11 and gives the upper working roll 1 the desired horizontal bending. When the upper work roll 1 is given a desired horizontal bending, the upper work roll 1 is displaced in the horizontal direction and also in the vertical direction, changing the roll crown. Thus, the shape of the rolled material S can be controlled arbitrarily.

In the above, when replacing the rolls, the piston rod 15 of the cylinder 16 is contracted to separate each support roll 21 from the intermediate roll 11, and then the shaft 18 is fixed to the leg portion 9 by the stopper 23. Thereafter, the clamps 20 gripping both ends of the shaft 18 are released by operating the cylinders 19, and the casing 14 is moved so that the piston rods 15 of each cylinder 16 are contracted and all the support brackets 17 are separated from the shaft 18. retreat to the side.

In this state, the upper work roll 1 and the intermediate roll 11 are pulled out together in the axial direction, while the support roll 21 is also pulled out together with the upper backing roll 3 in the axial direction.

This eliminates the need to reassemble the support roll d twice after pulling out the support roll as in the conventional case, and also allows replacement without making the stroke longer than necessary as in the case of the cylinder e.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effect of the invention] As explained above, according to the rolling mill of the invention, the support roll can be pulled out from the housing together with the backing roll without turning or removing the horizontal bending device and pulling it out in the line direction. Therefore, roll replacement work can be easily performed. Therefore, this is particularly advantageous in hot rolling where the support roll and backing roll are replaced at approximately the same time.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of the rolling mill of the present invention, Fig. 2 is a view taken along the - arrow in Fig. 1, Fig. 3 is a diagram showing the structure of both ends of the split roll shaft, and Fig. 4 is a diagram of the conventional rolling mill. It is an explanatory diagram. 1 is the upper work roll, 6 is the axle box, 9 is the leg part, 10
is an axle box, 11 is an intermediate roll, 16 is a cylinder, 1
7 is a support bracket, 18 is a shaft, 20 is a clamp, 21 is a split support roll, and 23 is a stopper.

Claims (1)

[Scope of utility model registration request] In a rolling mill equipped with an intermediate roll, a support roll, and a horizontal bending device in parallel with a work roll, the intermediate roll is engaged with an axle box of the work roll, and the support roll and the horizontal bending device are configured to be detachable. A rolling mill characterized in that the support roll is configured to be engageable with an axle box of a backing roll that supports the work roll.