JPS623814A - Automatic attaching detaching mechanism of roll coupling for rolling mill - Google Patents

Abstract

PURPOSE:To shorten the time for a roll change by providing a lock pin connecting to a roll in a roll coupling and constituting the same in such a manner that the pin is unlocked by the pressure fluid supplied therein by a remote operation. CONSTITUTION:The coupling 5 is held on a support 6 in the roll changing stage. The other end of a passage 16 for the pressure fluid in the support 6 is connected via a flexible hose, 17, etc. to a pressure fluid source. The pressure fluid is fed through the passage 16 and annular groove 14 in the support 6 and a passage 13 in the coupling into a cylinder 8 when the pressure fluid is supplied into the coupling by the remote operation, then a ram 9 slides radially outward by overcoming the pressing force of a spring 11. The top end of the ram 9 is disengaged from a roll groove 12 and the connection between the roll and the coupling is released.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a rolling mill having a roll shift function, and in particular, the present invention relates to a rolling mill having a roll shift function, and in particular, to automatic tracking of the drive spindle of the roll during rolling, and roll rearrangement. The present invention relates to an automatic attachment/detachment mechanism for roll couplings by remote control suitable for automatic rearrangement at times.

[Background of the invention]

In conventional rolling mills with a roll shift function, an extension mechanism that slides with a spline or the like is installed in the middle of the drive spindle, so that the spindle can follow the roll shift. The roll coupling is usually oval-shaped and loose-fitting, and there is a risk that the roll coupling may not follow the shift movement of the rolls and may slip out during roll shifting, so the following measures have been taken.

That is, JP-A-50-3064 and JP-A-51-142.
As described in Japanese Patent No. 464, (1) A lock pin is provided that penetrates the roll and the roll coupling in the radial direction, and is caused to follow the roll. As described in Japanese Unexamined Patent Publication No. 55-22463, (2) a bearing is provided in the spindle intermediate portion or the roll coupling portion, and this bearing is connected to a roll shift device for tracking. As described in Japanese Unexamined Patent Publication No. 59-125207, (3) a bearing is provided at the intermediate portion of the spindle, and a cylinder for spindle shift is attached to this bearing in synchronization with and follows the roll shift. As described in Japanese Patent Application Laid-open No. 59-156510, (4) a spring is provided in the center of the spindle in the direction in which force acts on the side where the spindle is always stretched by the spline part, and the roll coupling is always pressed against the roll. make them follow. As described in Japanese Utility Model Application Publication No. 59-114208, (5) a lock pin mechanism is provided that penetrates the roll and the roll coupling in the radial direction, and when locked, a subring is used, and when unlocked, pressure is applied. By activating the lock pin with fluid to attach and detach it, a flow path for pressurized fluid is passed through the roll in the axial direction and opened at the end of the roll shaft on the operating side, allowing remote control.

Each of these means has the following characteristics.

(1) Although the structure is simple and the followability is reliable, the operator must go to the relevant part on the drive side of the rolling mill and perform manual operation each time to release the rolls when changing rolls. The drive side of a rolling mill usually has a complicated structure that requires close access by people, which is not only unfavorable from a safety standpoint, but also reduces the efficiency of rolling operations because it cannot be operated automatically.

(2) Followability is reliable and automatic roll rearrangement is possible, but this is only possible when a roll shift device is provided on the drive side.

Moreover, maintenance of the spindle and its surroundings is hindered.

(3) Although it is possible to ensure followability and automatically change rolls, and the roll shift device is installed on either the operation side or the drive side, it significantly impedes maintenance around the spindle, and the spindle Since a dedicated shift device is provided and synchronized with the roll shift, equipment costs increase and there is an economical problem.

(4) Reliable followability, automatic roll reshuffling, possible regardless of the installation position of the roll shift device, and good maintainability around the spindle, but the action force of the built-in spring is constantly applied to the roll neck bearing and drive machine. This is applied as a thrust load to the drive shaft bearing, reducing the life of the bearing, and since the installation space for the built-in spring is limited by the spindle length, it cannot support long-stroke roll shifts.

Furthermore, if the sliding resistance of the spline part of the spindle becomes greater than the built-in spring force for some reason, it will cause tracking failure during roll shifting, causing the roll coupling to pull out from the roll, resulting in incomplete mating. or there is a risk of it falling off.

Therefore, when this means is used, a non-contact sensor or the like is provided and a backup measure is also used to detect whether the roll coupling is removed or removed.

Furthermore, since the spline portion is built into the spindle, the structure of the spindle itself becomes complicated, which poses problems in terms of maintainability and economy.

(5) This means compensates for most of the deficiencies found in each of the above means. However, since the flow path for pressurized fluid when the lock is released is provided through the center of the roll in the axial direction, no operation is required on the drive side, but pressurized fluid flows to the end face of the roll on the operation side. Connection and release means for supplying fluid to the opening of the flow path are essential, and this becomes a factor that impedes automatic roll change. Furthermore, it is necessary to provide protrusions and grooves for connecting the respective flow paths to the fitting portion between the roll and the roll coupling, resulting in a special shape different from that of a normal roll.

[Purpose of the invention]

The objects of the present invention are to ensure followability to roll shifts, to have a simple spindle structure, to have good maintainability around the spindle, to ensure reliable attachment and detachment of rolls and roll couplings when changing rolls, and to Another object of the present invention is to provide an automatic attachment/detachment mechanism for a roll coupling for a rolling mill that can be easily performed by remote control and enables automatic roll rearrangement.

[Summary of the invention]

The present invention takes advantage of the simplicity of the lock pin mechanism and the reliability of followability to roll shifts, and in order to enable automatic roll change, a lock pin is provided in the roll coupling to connect with the roll, and a spring etc. A force is always applied to the side connected to the rolls by the expandable body, and when the rolls are changed, pressurized fluid is supplied by remote control using the holding device of the roll coupling, which is always held, as a relay point to release the lock.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a schematic diagram showing the overall configuration of a rolling mill according to the present invention, and shows an example of work roll drive of a four-high rolling mill. Rolling machine 1
Includes upper and lower reinforcing rolls.

Upper and lower work rolls la and lb supported by the roller 1d are incorporated, and the work rolls la and lb are structured to move in the axial direction in order to control the shape of the rolled material (not shown). Work role la.

A driving spindle 2 is connected to 1b, and the other end of the spindle is connected to an output shaft of a driving machine 3.

The input shaft of the drive machine 3 is connected to a prime mover 4 (usually an electric motor) via a coupling.

The spindle 2 has a spline formed substantially in the center so that it can expand and contract when the work rolls la and lb shift in the axial direction.

The functionality required by this structure is role la.

The spindle 2 must automatically follow the axial movement of the roll 1b by expanding and contracting the spline portion 2a, and the spindle 2 must not fall off from the rolls la and lb during rolling. Furthermore, in the case of roll rearrangement, it is necessary to disconnect the rolls la, lb and the spindle 2.

According to the present invention, when changing the rolls, the rolls can be reassembled in a short time, reliably, and completely by remote control.

1b and the spindle 2, and is provided with an automatic attachment/detachment mechanism for a roll coupling that can be reliably connected during rolling to automatically follow roll shifts.

FIG. 2 is a detailed view of the section ■ in FIG. 1, in which the roll coupling 5 is supported by the coupling support 6. The rolls la, lb are inserted into a coupling 5, and an automatic attachment/detachment mechanism 7 is provided.

FIG. 3 is a detailed view of the cross section taken along the line mm in FIG. Indicates a state where has been canceled.

In the cylinder 8 provided in the roll coupling 5,
A radially slidable ram 9 is provided.

A spring 11 is provided between the ram 9 and the spring holder 10, and by constantly pressing the ram 9 in the radial direction, the holes 12 provided in the rolls la and lb are
The tip of the ram 9 is engaged with the roll coupling 5 and the rolls la and lb are connected. During rolling in this state, the spindle automatically follows the roll shift operation, and the coupling does not fall off from the roll.

At the time of roll change, the coupling 5 is held on the support 6. In the cylinder 8, a flow path 13 for pressurized fluid passes through the coupling 5 and opens to the outer periphery. The support 6 is provided with a circular groove 14 on the contact surface with the coupling 5, and by providing an ○ ring 15 on the inner circumference of this groove 14, a flow path 16 in the support 6 and a flow path in the coupling are formed. 13 is connected.

The other end of the pressurized fluid flow path 16 in the support is connected to a pressurized fluid source (not shown) via a flexible hose 17 or the like, and when pressurized fluid is supplied by remote control,
Channel 16° circular groove 14 in support 6. Pressurized fluid is fed into the cylinder 8 through the channel 13 in the coupling, and the ram 9 overcomes the pressing force of the spring 11 and slides in the radial outward direction, and the tip of the ram 9 is moved from the groove 12 of the roll. It comes off, and the connection between the roll and the coupling is released.

(The state is shown in the left half of Fig. 3.) [Effects of the Invention] According to the present invention, a rolling mill with a roll shift function,
The drive spindle reliably automatically follows the roll shift operation, preventing the coupling from falling off the roll during rolling, and when changing rolls, the roll and spindle can be attached and detached by remote control without the need for human intervention. Since this can be easily done, it is possible to significantly shorten the roll reshuffling time.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a rolling mill according to the present invention, FIG. 2 is a detailed diagram of a roll coupling portion, and FIG. 3 is a detailed sectional view of an automatic attachment/detachment mechanism. DESCRIPTION OF SYMBOLS 1... Rolling mill, 2... Spindle, 3... Drive machine, 4... Prime mover, 5... Roll coupling, 6...
... Coupling holding device, 7... Roll coupling attachment/detachment mechanism.

Claims (1)

[Claims] 1. In a rolling mill with a roll shift function, a locking mechanism such as a pin that is always pressed against the locking side by an elastic body is provided at the fitting part of the roll side coupling of the drive spindle and the roll, and the roll During rearrangement, the rolling structure is characterized in that the holding device of the roll coupling is used as a relay point and pressurized fluid is used to hit the telescopic body of the locking mechanism by remote control to release the lock. Automatic attachment/detachment mechanism for roll couplings.