JPS59191507A - Rolling mill - Google Patents

Abstract

PURPOSE:To perform easily the sliding adjustment and the mounting and dismounting of a work roll by installing an intermediate slider capable of freely engaging and disengaging with/from a roll bearing between a driving spindle of the work roll and the bearing thereof and providing hardening treatments to the heads of pressing cylinder rams. CONSTITUTION:In sliding adjustment, cylinders 23 for sliding actuate, with a hook 71 of an intermediate slider 7 engaged with the engaging part of a roll bearing 32, to move a work roll 3 in its axial direction together with the bearing 32. At that time, an intermediate bearing 83 and an intermediate shaft 82 are moved together, but a spindle 6 is not required to slide because the shaft 82 can slide freely in the inside of a driving cylinder 6. In rearranging the roll 3, the engagement of the hook 71 is released by the actuations of hook cylinders 72 to draw out the roll 3 and the bearing 32 from a housing 2. In these cases, ram 34 heads of pressing cylinders 33 housed in the bearing 32 are provided with hardening treatments, and hardened liners 24 are provided to the side of fixing blocks 21, then the sliding adjustment and the rearrangement of the roll 3 are smoothly performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rolling mill, and particularly to a rolling mill equipped with a slide mechanism for sliding work rolls in the roll axis direction.

[Background of the invention]

In recent years, requirements for thickness accuracy of rolling mill products have become increasingly strict, and in response to this, the thickness accuracy in the longitudinal direction of rolled materials has reached a considerable level due to rapid advances in automatic plate thickness control.

On the other hand, various methods have been attempted to improve the thickness accuracy in the widthwise direction of the sheet, for example, sliding the work rolls of a rolling mill in the axial direction has been used.

In such a rolling mill, as one of the means for moving the work rolls in the axial direction on the drive device side, a moving mechanism that moves by a piston cylinder or the like is connected to the bearings of the rolls. A system is adopted in which the spindle that drives the roller and the roll are moved integrally in the axial direction. However, in this conventional method, the mouth and spindle are integrally connected, and the
The roll bearing and the slide mechanism were still mechanically connected. For this reason, when changing roles etc.,
In each case, the mechanical connection between the slide mechanism and the roll bearing must be manually engaged and disengaged by an operator, which requires a lot of time and effort in the reassembly work. Furthermore, a large-scale slide drive device is required when the work roll is slid.

Further, the work roll is usually pressed against the reinforcing roll by a suppression cylinder, and the slide adjustment of the work roll is performed by sliding the cylinder ram head of the suppression cylinder.

As a result, galling and seizure occur in the head of the cylinder ram, and bending stress acts on the cylinder ram, causing problems such as wear of the cylinder packing of the suppression cylinder and wear of the cylinder bore.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problems, and its purpose is to: 1) eliminate the need for a smooth slide drive device in adjusting the slides of work rolls; It is an object of the present invention to provide a rolling mill in which loading and unloading can be easily carried out, and (1) furthermore, galling does not occur in the cylinder ram head of a pressing cylinder and bending stress does not occur in the cylinder ram during work roll slide adjustment work.

[Summary of the invention]

The outline of the present invention is that the slide mechanism has an intermediate slider that is located between the roll bearing part of the work roll and a drive spindle that rotationally drives the work roll and can slide independently, and that the intermediate slider has a roll bearing part of the work roll and a drive spindle that rotates the work roll. This means that when adjusting the slide of the work roll, there is no need for a large-scale slide drive device, and there is no need for the worker to break the mechanical connection between the roll bearing and the slide mechanism. It is. Further, since the cylinder ram head of the pressing cylinder slides with little friction, occurrence of galling or the like of the cylinder ram head is prevented.

Therefore, the gist of the present invention is that an intermediate slider is provided between a work roll and a drive spindle for rotationally driving the work roll, and the work roll is slidable in the roll axis direction integrally with the work roll. A roll bearing is provided, the intermediate slider is detachably connected to the roll bearing, and a suppression cylinder for pressing the work roll against the reinforcing roll is provided between the intermediate slider and a fixed block that supports the intermediate slider. This rolling mill is characterized in that the head of the cylinder ram of the suppression cylinder is hardened, and a hardened liner is installed on the fixed block side. Note that the hardened liner is not limited to a separate liner, but also includes overlays made of hardening material, etc.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 1 to 5.

A housing 2 is provided across the rolled material 1, and work rolls 3 are provided above and below the rolled material 1. Furthermore, a reinforcement roll 4 for reinforcing the work roll 3 is provided on the outside of the work roll 3. A binion stand 5, which is a drive device for rotationally driving the work roll, is provided on one side of the housing 2. A drive spindle 6 extends from the binion stand 5, and the drive spindle 6 rotates the work roll. 3 is configured to be rotationally driven.

A roll shaft 31 of the work roll 3 is rotatably supported on a roll bearing 32, and the work roll 3 and roll bearing 32 can slide integrally in the axial direction. The roll bearing 32 is held within the /1 housing 2 so as to be slidable in the axial direction with respect to the fixed block 21. A pressure cylinder 33 is built into the roll bearing 32, and a cylinder ram 34 of the pressure cylinder 33 presses the fixed block 21 side. As a result, the work roll 3 is pressed against the reinforcing roll 4. Roll bearing 3
A pawl-shaped retaining portion 35 facing inward of the shaft is provided on the drive spindle 6 side of No. 2.

On the other hand, the drive spindle 6 is hollow inside.
An intermediate shaft of an intermediate slider, which will be described later, is inserted into this hollow portion and is slidable in the axial direction. The driving spindle 6 and the pinion stand 5 are connected by a universal joint 61.

An intermediate slider 7 provided between the work roll 3 and the drive spindle 6 is slidable in the axial direction of the work roll 3 within a frame 22 fixed to the housing 2. A slide cylinder 23 for sliding the intermediate slider 7 is provided on the outside of the frame.

The roll bearing 320Ill of this intermediate slider 7 includes:
A claw-shaped hook 71 is provided on the outside and is adapted to engage with the claw-shaped engaging portion 35 facing inward of the roll bearing. This hook 71 is configured to be rotated by a hook cylinder 72 to engage and disengage. Also, in the center of the intermediate slider 7, there is a roll shaft end 3 inside.
6. A roll coupling 8 for full insertion engagement is provided.

Both the roll coupling 8 and the roll shaft end 36 have a rectangular cross-section, and the work roll 3 is rotated by rotation of the roll coupling. The roll coupling 8 is connected to an intermediate shaft 82 via a universal joint 81, and the intermediate shaft 82 is held by an intermediate bearing 83. It is held by an intermediate bearing 83. The intermediate bearing 83 is connected to the intermediate slider 7 through an arm 84 and a pin 85, so that the intermediate shaft 82 and the intermediate slider 7 can slide together.

The intermediate bearing 8
A balance cylinder 86 for maintaining the balance of 3 is provided on the intermediate slider 7.

This maintains the balance of the intermediate bearing 83 and prevents the drive spindle 6 from sagging.

As mentioned above, the roll bearing 32 has a built-in suppression cylinder 33, and the cylinder ram 34 of the pressure cylinder 33 is pressed against the fixed block 21 provided in the housing 2 inside the housing 2. Therefore, the head of the cylinder ram 34 slides with respect to the fixed block 21 during slide adjustment of the work roll 3 and during rearrangement work of the work roll 3. In order to prevent friction from sliding, the following configuration is adopted. That is, the head of the cylinder ram 34 is processed, and this cylinder ram 3
A hardened liner 24 is provided on the side of the fixed block 21 on which the four heads slide. A control circuit is provided that automatically weakens the cylinder pressure of the pressure cylinder 33 and controls it to a low pressure within a range where roll slip does not occur during slide adjustment of the work roll 3 and during rearrangement work of the work roll 3. There is.

The operation of this embodiment will be explained below.

During slide adjustment, the slide cylinder 23 operates while the hook 71 of the intermediate slider 7 and the engaging portion 35 of the roll bearing 32 remain engaged, and the work roll 3 is moved along with the roll bearing 32 in the roll axis direction. , and the predetermined slide adjustment is performed. At this time, the roll coupling 8, intermediate bearing 83, and intermediate shaft 82 also slide at the same time. However, since the intermediate shaft 82 can freely slide inside the drive spindle 6, the drive spindle 6 does not need to be slid, and the slide cylinder 23, which is a slide drive device, can be small, and a large and bulky slide can be used. No drive required.

In addition, when changing the work rolls 3, the hook cylinder 72 provided on the intermediate slider 7 is operated to rotate the hook 71 and disengage the hook 35 from the engagement portion of the roll bearing 32.

As a result, the roll bearing 32 and the intermediate slider 7 are separated. After that, the work roll 3 and the roll bearing 32 are
The work rolls 3 can be pulled out integrally from the housing 2 and rearranged easily.

During slide adjustment and rearrangement work of the work roll 3, the head of the cylinder ram 34 of the pressure cylinder 33 built into the bearing 32 of the work roll 3 slides on the fixed block 21 on the housing 2 side. Cylinder ram 34@
Since the fixed block 21 is also provided with a processed liner 24, slide adjustment and rearrangement work can be performed smoothly without wear on both parts. Further, when adjusting the slide of the work roll 3, the cylinder pressure of the suppression cylinder 33 is automatically controlled and suppressed to a low pressure within a range where roll slip does not occur, so that the slide adjustment is performed even more smoothly. Therefore, galling of the head of the cylinder ram 34 and bending stress generated in the cylinder ram can be minimized. This further prevents oil leakage from the suppression cylinder 33 to intrusion of crust water into the pressure cylinder 33, and provides a rolling mill fully equipped with suppression cylinders that is easy to maintain, economical, and has uniform reliability. becomes.

In the above embodiment, the suppression cylinder 33 was built into the roll bearing 32 of the work roll 3, but the sixth
In another embodiment, as shown in the figure, the pressure cylinder 33
may be provided on the housing 2 side. In the embodiment shown in FIG. 6, the suppression cylinder 33 is provided in a protrusion 25 provided at the housing position and protrudes toward the roll bearing 32, and the cylinder ram 34 of the pressure cylinder 33 is connected to the roll bearing 32. The collar part 37 provided in
is pressed against the reinforcing roll 4 side. In this embodiment as well, the head of the cylinder ram 34 is hardened, and a hardened liner 24 is installed on the sliding surface of the flange 37 that slides on the cylinder ram head. In this embodiment as well, it is possible to obtain exactly the same wear resistance effect as in the first embodiment.

〔Effect of the invention〕

According to the rolling mill of the present invention, (1) the roll bearings of the work rolls and the slide mechanism are not mechanically coupled, and there is no need for an operator to break the mechanical coupling each time the rolls are rearranged. (2) Furthermore, the drive spindle itself does not need to slide when adjusting the slide of the work roll, and the slide drive device can be of a minimum scale. ■Furthermore,
When adjusting the slide of the work roll, galling at the head of the cylinder ram of the press cylinder and bending stress of the cylinder ram are minimized.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a rolling mill according to an embodiment of the present invention;
Figure 2 is a plan view of the II-II arrow in Figure 1, and Figure 3 is the
4 is a side view of FIG. 2 as viewed from the ■-■ arrow, FIG. 5 is a vertical cross-sectional view of FIG. 1, and FIG. 6 is a view of FIG. This is a different drawing. DESCRIPTION OF SYMBOLS 1... Rolled material, 2... Housing, 21... Fixed block, 22... Frame, 23... Sliding cylinder, hardened liner, 25... Protrusion part, 3...
... Work roll, 31 ... Roll shaft, 32 ... Roll bearing, 33 ... Suppression cylinder, 34 ... Cylinder ram, 35 ... Engagement part, 36 ... Roll shaft end, 3
7... Flange portion, 4... Reinforcement roll, end/binion stand, 6... Drive spindle, 61... Universal joint, 7... Intermediate slider, 71... Hook, 72...・
・Hook cylinder, 8... Roll coupling, 81
... Universal joint, 82 ... Intermediate shaft, 83 ... Intermediate bearing, 84 ... Arm, 85 ... Bin. Agent Patent Attorney Tatsuyuki Unuma

Claims (1)

[Scope of Claims] 1. In a rolling mill in which a work roll for rolling can be slid in the roll axis direction, a work roll reinforced with a reinforcing roll and a drive spindle for rotationally driving the work roll are provided. an intermediate slider is provided between the work rolls, a roll bearing that is slidable in the axial direction integrally with the work roll is provided, the intermediate slider is configured to be freely engageable and detachable from the roll bearing, and the intermediate slider and the intermediate A suppressing cylinder for pressing the work roll against the reinforcing roll is provided between the fixed block that supports the slider, the cylinder ram head of the pressing cylinder is hardened, and a hardened liner is installed on the fixed block side. rolling mill. 2. In claim 1, the suppression cylinder is
A rolling mill that has a control circuit that can control cylinder pressure to a low pressure that does not cause roll slip when adjusting the slide of work rolls.