JPS5910848B2 - 18-high rolling mill - Google Patents

Description

[Detailed description of the invention] The present invention relates to an 18-high rolling mill.

An object of the present invention is to improve the structure of a cold metal rolling mill to improve productivity, product quality, and reduce rolling costs.

Generally, conventional four-stage (1-1) and six-stage (1-1)
In the rolling mill of -1), it is impossible to reduce the diameter of the work roll to less than about one quarter of the stop IJ width.

This is because in a rolling mill in which one work roll is driven, the neck of the work roll must be sufficiently large to transmit the required rolling torque.

In rolling mills where intermediate rolls or backup rolls are driven, rolling torque reaction forces and tensile forces cause lateral force bending of the work roll body, and if the work roll diameter is too small, this lateral force plane bending will occur. This is because excessive stress is applied to the roll, creating a risk of roll breakage, and the flatness of the rolled material is impaired due to the work roll being laterally displaced from the backup roll.

Although the present invention consists of a novel 18-high rolling mill, it may also be described as an improvement on the 6-high rolling mill, which includes two side support group assemblies for each work roll. The diameter of the work rolls is small (G') equal to one hundred of the smallest diameter possible in conventional four- and six-high rolling mills.
diameter work rolls can be adopted.

A lateral force support assembly provides support along the entire length of the work roll, which is necessary to prevent lateral bending of the work roll due to the effects of drive torque reaction forces and tension forces.

In the rolling mill according to the present invention, either the intermediate roll or the backup roll is driven.

The basic arrangement of the 18-high rolling mill shown in FIG. 1 includes two upper and lower roll groups, each roll group having a work roll 30,
The work roll is supported vertically by an intermediate roll 27 and a back-up roll 23 and in the lateral force direction by side support rolls 28 and 29, which in turn are supported by side back-up bearings 21, 22 and 25, 26, respectively. It is supported in both vertical and lateral force directions.

As shown in FIG. 2, the intermediate roll is rotatably provided in the bearing box 38, and the backup roll is provided in the bearing box
Both edges of the bearing box are nested and slidably mounted together within the housing 32.

Spacers 34 and screws 33 may be used to adjust the roll gap according to the prior art.

A drive may be provided on either the backup roll or the intermediate roll.

The work roll 30 is not provided within the bearing box, but
Although it can freely float vertically and horizontally as in a multi-high rolling mill, its movement in the lateral force direction is restrained by the side support rolls 28 and 29.

The side support rolls are themselves fully supported by side backup bearings 21 and 22 and 25 and 26, respectively.

As shown in FIGS. 3 and 4, the side backup bearings are mounted within a side force support beam 40 with attached arms 48, which are connected to the backup roll bearing box 20 by pivot pins 59, pushers 39 and spacers 44. Pivot on top.

The work roll is held axially by bearings 50 and 51 at each end, as shown in FIG.

The front thrust bearing 50 is mounted on a fixed shaft 55, which is positioned on the front door 52.

The front door is hingedly mounted on the front housing 32 by pins 53 and brackets 54.

The rear force null bearing 51 is provided on a fixed shaft 56 disposed in a back plate 57, and the back plate is attached to the rear housing 35 by bolts 58. It is held in the axial direction by the bearing 60 and the null button 61.

The null button pushes the front force door 52 and the back plate 57, thus preventing axial force movement of the intermediate side rolls. Said device for axial support of work rolls and side support rolls is based on the prior art Sendzimir (S e
ndzi mir) is used for crust mill rolls.

As shown in FIGS. 3 and 5, a typical side backup bearing 21 has a needle roller 47 that moves
It is rotatably mounted on 6. A side backup bearing is provided within a recess in a side force support beam 40 to which the side backup bearing is rotatably mounted by a shaft 46.

Nupacer washers 45 are used to centrally position the shaft within the recess of the lateral force support beam, and the shaft 46 is supported with close axial spacing and is further clamped within the lateral force support beam by nuts 49.

Each of the side force support beams is supported in the horizontal force direction by a rod l-' 41 and in the vertical force direction by a pivot, which pivot is associated with the backup roll bearing box 24 as described above.

A Nupaca rod 41 is provided within the bore of the Nupaca beam 43, which is rigidly attached to the front housing 32 and the rear housing 35 by bolts 44.

Any lateral force loads on the lateral force support beams are transmitted via adjusting screws 42 and herrods 41 provided on the support beams.

Side backup bearing assembly and its support
The construction of all four sets of adjustment mechanisms is the same and as described above.

This arrangement is similar in some respects to the construction of the side backup bearing assembly incorporated in the cluster mill of US Patent Application No. 880,601.

The foregoing examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure.

It should be noted that in some embodiments, the work roll is fully supported along its entire length by side support rolls, which in turn are fully supported in both horizontal and vertical planes by side backup bearing assemblies. It is.

The external force, intermediate rolls and backup rolls are mounted in bearing boxes as in conventional four-high and six-high rolling mills.

Although mounting installations in bearing housings are satisfactory for these large rolls, the mechanism provided by the side support rolls and side backup bearing assemblies is the only complete support for the work rolls, which , allowing the use of much smaller work rolls than in conventional rolling mills.

It is anticipated that the rolling mill according to the present invention may also combine the advantages of conventional four-high rolling mills and the dual technology of Kulanutamir.

For example, the construction of the work rolls and side backup bearing assemblies may follow Sendzimir Kuranu mill technology, while the intermediate and backup rolls and housing follow conventional four-high mill technology.

It is contemplated that other features of the rolling mill may be conventional for either technology.

The adjustment mechanism for the axial force direction of the intermediate roll and the mill oil bite spray design on the roll bite are probably based on the kuranutamiru technology.

The drive system, back-up roll and intermediate roll mounting reduction and roll change equipment are probably based on four-high rolling mill technology.

In many cases, existing four- and six-high rolling mills can be retrofitted by replacing the existing roll chock assembly with a roll chock assembly according to the present invention and by attaching the front door, back plate, and Nupesa flash to the mill housing. It can be converted into a new 18-high rolling mill.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of an 18-high rolling mill according to the present invention, FIG. 2 is a front elevational view of one embodiment of the 18-high rolling mill according to the present invention, and FIG. 3 is a schematic front view of an 18-high rolling mill according to the present invention. 1 is a front force cross-sectional view of the upper half of the high rolling mill illustrating the installation and adjustment of the side force support assembly; FIG. 4 is a view taken along line 4--4 of FIG. 3, and FIG. 5 is a cross-sectional plan view taken along line 5--5 of FIG. 21, 22, 25, 26...Side backup bearing, 23...Backup bearing, 24.38...Bearing box, 27...
Intermediate roll, 28.29... Side support roll, 30... Work roll, 32, 35...
... Housing, 40 ... Support beam, 41
...Rod, 42...Adjustment screw, 43
...Nupesa Buri, 45...Nupesa Watusha, 46, 56...Shaft.

Claims (1)

[Scope of Claims] 1. Work rolls in an 18-high rolling mill, consisting of an upper group of nine rolls and a lower group of nine rolls, each of the roll groups being arranged on the same vertical plane. , an intermediate roll, and a backup roll, and further comprises two side support rolls that contact both sides of the work roll, and two side backup bearings that contact each of the side support rolls. Eighteen-high rolling mill. 2. In the 18-high rolling mill described in claim 1, intermediate rolls and backup rolls are installed in a bearing box for each of the upper and lower roll groups, and work rolls and side support rolls are free in the roll groups. floating in
and each side back-up bearing consists of several bearings mounted in a rotating manner on a fixed shaft, said shaft and side support rolls being mounted in a rigid support supported at one end by a pivot so as to be adjustable in position. An 18-high rolling mill characterized in that the shaft is provided and supported by the support beams at intervals along the entire length of the shaft.