JPH069705U - Multi-stage cross rolling machine - Google Patents

Abstract

(57) [Summary] [Objective] To provide a rolling mill with a simple structure and a large crown control capability. [Structure] The upper and lower work rolls 1 and 2 are pivotally supported so that they can be crossed in a horizontal plane. Upper and lower work rolls 1, 2
Via the upper and lower intermediate rolls 3a, 3b and 4a, 4b, the upper and lower three backup rolls 5a, 5b, 5
c and 6a, 6b, 6c. Intermediate roll 3
a, 3b and 4a, 4b and the backup roll 5a,
5b and 6a, 6b are rotatably supported. The backup rolls 5a, 5b and 6a, 6b are associated and displaced, and the cross angles of the upper and lower work rolls 1, 2 are set through the displacement of the intermediate rolls 3a, 3b and 4a, 4b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-stage cross rolling machine in which upper and lower work rolls are arranged in a cross in a horizontal plane to roll a plate material.

[0002]

[Prior art]

 In recent years, the requirements for the thickness accuracy of rolled products in the plate width direction have become increasingly strict. Generally, the coil has a middle height in the plate width direction.Therefore, in order to correct the thickness distribution to cancel this, there is a method of attaching an initial crown to the work roll in advance or a method of bending the work roll. Are known.

However, in the case of a method in which a work roll is provided with a crown, the number of rolls corresponding to the rolling conditions such as the plate width and the thickness of the plate material is held, and the number of rolls varies depending on the rolling conditions. The roll of the crown must be replaced, which causes a problem of lowering the operating rate.On the other hand, in the case of the method of bending the work roll, due to the strength of the roll neck of the work roll, Since there is a limit to the bending force that can be applied, there is a problem that it is not possible to obtain sufficient thickness distribution correction ability in the plate width direction.

Therefore, as shown in FIG. 2, at least one of the upper and lower work rolls a and b (the upper work roll a in the figure) is an intermediate position where the upper and lower work rolls a and b are arranged at the entrance and exit sides of the pass line l. The rolls c and d are supported, and the intermediate rolls c and d are supported by the backup rolls e and f arranged on the inlet and outlet sides of the pass line 1 and the backup roll g arranged in the middle thereof. The other work roll b 1 is supported by a backup roll h, and the backup rolls e 1 and f 2 are, as shown in FIG. 3, a roll shaft i, a roll body j divided into a plurality of parts in the axial direction, and The structure is composed of an eccentric sleeve k interposed between the roll body j and the roll shaft i, and the backup rolls e and f are backed up by changing the angle of the eccentric sleeve k. A multi-stage cluster rolling mill has been proposed in which the crown of the work roll a can be controlled through the intermediate rolls c and d by adjusting the roll crowns of the rolls e and f (Japanese Patent Publication No. 2-18164).

[0005]

[Problems to be solved by the device]

 However, in the case of the above-described multi-stage cluster rolling mill, since the intermediate rolls c and d are interposed between the backup rolls e and f and the work roll a, the crown control capability is limited, and the backup rolls e and f are limited. Since there is an axially divided structure, there is a problem that the structure becomes complicated. In addition, the roll mark by each divided roll body j is a plate material (product) through the intermediate rolls c and d and the work roll a. It has the drawback of being transferred to.

Therefore, the present invention is intended to provide a multi-stage cross rolling mill which has a simple structure and does not have a roll mark on a product and has a large crown control capability.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention arranges the upper and lower work rolls so as to cross in a horizontal plane and rotatably supports the upper and lower work rolls at the entrance and exit sides of the pass line by the upper and lower work rolls. The upper and lower work rolls are supported by the arranged upper and lower intermediate rolls, and the intermediate rolls are rotatably rotatably supported. Further, the upper and lower intermediate rolls are backup rolls arranged on the entrance and exit sides of the pass line. In addition, the backup rolls arranged in the middle of each of them are supported, and the above-mentioned input and output side backup rolls are rotatably supported.

[0008]

[Action]

 If the upper and lower work rolls are respectively supported by the backup rolls via the input and output intermediate rolls, the positions of the work rolls directly above and below will not be constrained, and furthermore, the upper and lower work rolls will be crossed. The crown control capability can be increased. When four input / output backup rolls are associated and tilt-displaced, the upper and lower backup rolls are displaced through the intermediate roll that displaces along the backup roll, resulting in a small cross angle. It is possible to set any angle from to a large cross angle.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1A and 1B show an embodiment of the present invention, in which upper and lower work rolls 1 and 2 are arranged so as to cross each other in a horizontal plane and are axially supported so as to be displaceable in a horizontal direction. The upper and lower intermediate rolls 3a and 4a are arranged on the entrance side of the pass line L by the upper and lower work rolls 1 and 2, and the upper and lower intermediate rolls 3b and 4b are arranged on the exit side of the pass line L, respectively. The upper work rolls 1 are supported by the upper middle rolls 3a, 3b, and the lower work rolls 2 are supported by the two lower middle rolls 4a, 4b. 3b and lower intermediate rolls 4a, 4b are axially supported so as to be displaceable in the vertical direction, the horizontal direction, and the tilt direction, and further, upper and lower backup rolls 5a, 6a are provided on the entrance side of the above-mentioned pass line L, and also pass On the exit side of line L , The upper and lower backup rolls 5b and 6b, and the upper and lower backup rolls 5c and 6c in the middle thereof, so that the three upper backup rolls 5a, 5b and 5c support the upper intermediate rolls 3a and 3b. In addition, the three lower backup rolls 6a, 6b, 6c are made to support the lower intermediate rolls 4a, 4b, and the upper backup rolls 5a, 5b and the lower backup rolls 6a, 6b are respectively in the vertical and horizontal directions. The upper and lower work rolls 1, 2 cross the cross angles of the intermediate rolls 3a, 3b, 4a, 4b by the displacement of these back-up rolls 5a, 5b, 6a, 6b. Allow it to be set arbitrarily.

Note that FIG. 1A shows a state in which the working end surface of each roll is directly viewed from the front, and FIG. 1B shows a state in which the driving end surface of each roll is viewed from the front. ing .

In the above structure, when rolling is performed, the intermediate rolls 3a, 3b and 4a, 4b for supporting the upper and lower work rolls come into contact with the upper work roll 1 and the lower work roll 2 at positions apart from the vertical positions. In addition to the fact that the vertical deflection of the upper work roll 1 and the lower work roll 2 is not constrained, the effect of arranging the upper and lower work rolls 1 and 2 in a cross manner is added, so that the crown control capability can be increased. Wear. At this time, since the backup rolls 5a, 5b, 5c, 6a, 6b, 6c are not divided in the axial direction and have an integrated structure, the structure does not become complicated, and the backup rolls having the divided structure are further provided. There is no roll mark problem caused by using.

In (a) and (b) of FIG. 1, when the cross angles of the work rolls 1 and 2 at the positions indicated by the solid lines are to be further increased, the upper backup roll 5a on the inlet side and the upper backup roll 5a on the outlet side are to be adjusted. The upper backup roll 5b is tilted in the opposite direction in the vertical plane as indicated by the arrow with the roll center of gravity as the fulcrum. As a result, the two upper backup rolls 5a and 5b have their respective end faces displaced from the positions indicated by the solid line to the positions indicated by the two-dot chain line, so that the upper intermediate rolls 3a and 3b have their respective end faces indicated by the two-dot chain line. The upper roll is displaced to the position, and the end face of the upper roll is displaced from the position indicated by the solid line to the position indicated by the alternate long and two short dashes line. As a result, the horizontal arrangement angle is changed.

Similarly, when the lower backup rolls 6a and 6b on the input and output sides are tilted in correspondence with the tilting operation of the upper backup rolls 5a and 5b, the respective end faces of the lower backup rolls 6a and 6b are located at the solid line positions. To the position indicated by the chain double-dashed line, the end surfaces of the lower intermediate rolls 4a and 4b are displaced from the positions indicated by the solid line to the positions indicated by the chain double-dashed line. As a result of the displacement from the position to the position of the chain double-dashed line, the horizontal arrangement angle of the lower work roll 2 is changed to the opposite direction to the upper work roll 1. Therefore, the cross angle between the upper and lower work rolls 1 and 2 is adjusted more greatly.

As described above, when the four input / output backup rolls 5a, 5b, 6a, 6b are associated and displaced so as to tilt about the roll center of gravity in the vertical plane, the upper and lower work rolls 1, 2 Since it can be displaced along the intermediate rolls 3a, 3b, 4a, 4b, the cross angle can be easily changed, and an arbitrary angle from a small cross angle to a large cross angle can be set. You can

The present invention is not limited to the above embodiment, and the four back-up rolls 5a, 5b, 6a, 6b on the inlet and outlet sides are in a 90 ° range between the vertical plane and the horizontal plane. It is needless to say that the cross angles of the upper and lower work rolls 1 and 2 can be adjusted by tilting the work rolls in an arbitrary angle direction, and various changes can be made without departing from the scope of the present invention. .

[0017]

[Effect of device]

 As described above, according to the multi-stage cross rolling mill of the present invention, the upper and lower work rolls that are axially supported so that they can be arranged in the cross in the horizontal plane are provided with two upper and lower intermediate rolls arranged at the inlet and outlet sides. The upper and lower work rolls are supported by three upper and lower backup rolls, and the intermediate rolls and the input and output side backup rolls are rotatably supported. The ability to support it allows the crown control capability to be expanded, and because each backup roll is a non-divided integral structure, the structure is simple and there is no problem of roll marks due to the divided structure. Furthermore, by performing tilting operation while associating the four input / output side backup rolls, the cross angle of the upper and lower work rolls can be easily adjusted through the displacement of the intermediate roll. Bets can be, and can be set to any angle from a small cross angle to a large cross angle, it exhibits excellent effects and the like.

[Brief description of drawings]

1 shows an embodiment of a multi-stage cross rolling mill of the present invention, (a) is a schematic view of the working side end surface of each roll as viewed directly from the front, and (b) is the driving side end of each roll. It is the schematic diagram seen through from above.

FIG. 2 is a schematic view showing an example of a conventional multi-stage cluster rolling mill.

FIG. 3 is a schematic view of a backup roll used in the rolling mill of FIG.

[Explanation of symbols]

 1 Upper work roll 2 Lower work roll 3a, 3b Upper intermediate roll 4a, 4b Lower intermediate roll 5a, 5b, 5c Upper backup roll 6a, 6b, 6c Lower backup roll L Pass line

Claims (1)

[Scope of utility model registration request] 1. The upper and lower work rolls are arranged so as to cross each other in a horizontal plane and are axially supported so as to be displaceable in the horizontal direction. While supporting the upper and lower work rolls, the intermediate rolls are displaceably supported by a shaft,
Further, the upper and lower intermediate rolls, the pass line of the,
While supporting the backup roll placed on the exit side and the backup roll placed in the middle,
A multi-stage cross rolling mill having a structure in which the input and output side backup rolls are movably supported.