JPH02224809A - Changing method and equipment for work roll of rolling mill - Google Patents

Abstract

PURPOSE:To change new and old work rolls by one action by separating work rolls from a driving device and pushing old work rolls out at the same time that new work rolls are pushed in. CONSTITUTION:At first, new work rolls 3a, 3a' to be next used for changing are placed on a new roll rack 18 during rolling work. And the connection of the work roll 3 with the driving device 5 is disconnected by making the output shaft 12 to slide and separating male and female splines 13, 14. Next, the driving device 5 is taken refuge from the axial line of the work roll 3 by operating a cylinder 16 for rotating and making a gear box 4 to rotate. Simultaneously, an old roll rack 20 for receiving old work rolls 3, 3' is prepared on the opposite side against housing 2, 2'. Then, the new rolls are pushed in the housings 2, 2' as bringing the end face of the new work rolls 3a, 3a' into contact with the end face of the old rolls 3, 3' in the housing 2, 2' by operating a roll transfer device 21 provided on the new roll rack 18. Simultaneously, the old work rolls 3, 3' are pushed out the housing 2, 2' and are changed.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method and device for changing rolls in a rolling mill, particularly a method and device for changing rolls in a rolling mill that directly drives work rolls. It is related to.

[Prior Art] Conventionally, as described in Japanese Patent Publication No. 49-23991, as a work roll reshuffling method for a rolling mill in which the work rolls are not driven, a new work roll is replaced when reshuffling the work rolls. A work roll rearranging method is known in which a new work roll is prepared on the work side or the drive side, and a new work roll is pushed into the housing of the rolling mill, and an old work roll is pushed out in the opposite direction to the pushing side. .

[Problems to be Solved by the Invention] According to the conventionally known method for replacing non-driven work rolls,
By pushing in the new work roll and pushing out the old work roll, the old and new work rolls can be replaced, and the work rolls can be quickly replaced.

However, in a rolling mill in which the work rolls are directly driven, the drive device is fixedly disposed on the negative side of the work roll (housing), so the drive device gets in the way and prevents the work rolls from being driven. Unable to adopt the replacement method, after separating the old work roll from the drive device, the old work roll was pulled out to the side opposite to the drive device and removed, and then the new work roll was pushed in in the opposite direction to the pull-out direction. After that, it is necessary to connect the work roll to the drive device, which causes trouble in that the work to replace the work roll is troublesome and the work takes a long time.

For this reason, when it is necessary to frequently replace work rolls, it is possible to set the work rolls in a non-driving state by installing a driving backup roll, with the understanding that equipment costs will increase. The reality is that a quick work roll reshuffling method is used.

This invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to quickly change the work rolls of a rolling mill in which the work rolls are directly driven in the same way as to change the work rolls that are not driven. This makes it possible to reduce equipment costs by eliminating unnecessary backup rolls.

[Means for Solving the Problems] According to the present invention, when replacing the work rolls of a work roll drive type rolling mill, a new work roll is prepared in advance on the working side or the roll drive side of the housing, and the old work roll and the drive roll are prepared in advance. After separating the drive unit from the equipment and retracting the drive unit from the axial extension line of the work roll, a new work roll is loaded into the housing from one side of the housing, and an old work roll is loaded from the other side to the outside of the housing. After extruding,
A method for rearranging work rolls in a rolling mill, characterized in that the drive device is moved again onto the axial extension line of the work roll, and the drive device and a new work roll are connected, and a work roll disposed in a housing is provided. The shaft end and one end of the output shaft of the power transmission device that connects the input shaft to the drive source can be selectively connected by coupling, and the input shaft side of the power transmission device is rotatably supported, and the input shaft side of the power transmission device is rotatably supported. By rotating the power transmission device about a fulcrum, or by slidably supporting the power transmission device and sliding the power transmission device, the device can be retracted from the axis of the work roll and moved inside the housing. A workpiece of a rolling mill characterized in that a new work roll is placed on the same axis as an old work roll installed in the housing, and the old work roll is extruded from the housing while the new work roll is charged into the housing. A roll changing device is obtained.

[Function] According to the present invention, after separating the work roll and drive device (power transmission device) of a rolling mill that directly drives the work roll, the drive device is retracted from the extension line of the work roll, By pushing a new work roll prepared in advance into the housing and pushing the old work roll out of the housing, it is possible to replace the old and new work rolls in a single operation.

[Example] The following will explain the embodiments shown in the drawings.

1 to 4 show one embodiment of the present invention.

In the figure, a housing 2.2' fixed to the foundation 1
A pair of upper and lower work rolls 3.3' are rotatably supported.

The upper work roll 3 of this work roll 3.3'
is connected to a drive source such as an electric motor (not shown) via a power transmission bag fi5 such as a gear train housed in the gear box 4.

That is, as shown in detail in FIG. 3, the power transmission device E5 includes an input gear 8, an intermediate gear 9, and an output gear 10 fixed to an input shaft 7 connected to a drive source (not shown) via a coupling 6. It is formed by a gear train constructed by

The rotation of the output gear 10 is restrained via a slip key 11 or a spline, etc.
In addition, an output shaft 12 is fitted that is allowed to slide in the axial direction.

A female spline 13 is formed at the end of the output shaft 12 on the work roll 3 side.

Further, a male spline 14 is formed at the end of the work roll 3 on the output shaft 12 side.

Therefore, by sliding the output shaft 12 in the axial direction, the female spline 13 and the male spline 14 are engaged or disengaged, and the output shaft 12 and the work roll 3 are selectively connected.

Note that this power transmission device 5- is not limited to the gear train shown in this embodiment, and may be any device capable of transmitting the rotation of the input shaft 7 to the output shaft 12, such as a chain or a belt. Needless to say.

Referring also to FIG. 2.4, the gear box 4 is connected to the input shaft 7.
The entire body is rotatably supported by a bearing 15 attached to the side, and by operating a rotation cylinder 16,
It can be rotated 90 degrees via the lever 17 from the solid line position shown in FIG. 2 to the position shown by the two-dot chain line.

Therefore, after separating the female spline 13 and the male spline 14 as described above, the rotation cylinder 16 is activated to rotate the gear box, thereby retracting the power transmission device Σ from the extension line of the work roll 3.

Next, a method for rearranging the work rolls 3.3' will be explained with reference to FIG.

First, new work rolls 3a, 3a' for reassembly to be used next during the rolling operation are placed on the new roll stand 18 and prepared as a set.

When replacing the old work roll 3.3' with the new work rolls 3a, 3a', first slide the output shaft 12 to separate the male and female splines 13 and 14, as shown in FIG. 3 and power transmission device (drive device) Σ
Cut the connection with.

Next, as shown in FIG. 2, the rotation cylinder 16 is operated to rotate the gear box 4 (power transmission device 5) to retract the gear box 4 from the axis of the work roll 3, and the housing 2. An old roll stand 20 is prepared on the opposite side of the roll to receive the old work roll.

In this state, there are no obstacles on the sides of the work rolls 3, 3', so the pusher cylinder 19 is actuated to move the new roll mount 18 to the left in the figure from the state shown in FIG.

Then, the roll transfer device 2 installed on the new roll mount 18
1, the new work rolls 3a, 3a' are brought into contact with the end faces of the old work rolls 3, 3' in the housing 242' and the end faces of the new work rolls 3a, 3a'.
is pushed into the housing 2° 2', and the old work roll is pushed out of the housing 2, 2' and transferred onto the old roll stand 20.

In this way, a new work roll 3a.

After transferring and setting 3a' to housing 2.2',
The rotating cylinder 16 is operated in the opposite direction to return the gear box 4 to the axis of the new work roll 3a.

Then, by sliding the output shaft 12 in the axial direction to engage the male and female splines 13 and 14 to connect the new work roll 3a and the power transmission device 5, the work roll replacement is completed.

In the above-mentioned embodiment, the gear box 4 forming the power transmission device Σ is rotated to be retracted from the axis of the work roll 3.
As shown in FIGS. 5 and 6, the gear box 4 is slidably mounted on a rail 22 mounted on a pedestal, and the gear box 4 is
may be moved by the moving cylinder 23.

In addition, although the work rolls 3 and 3' are illustrated in which only one of the work rolls 3 is directly driven,
It goes without saying that a drive can also be selectively connected to both work rolls 3.3' so as to drive both.

[Effects of the Invention] According to the present invention, the work rolls of a rolling mill in which the work rolls are directly driven can be reassembled by a single movement in one direction, similar to the conventional reshuffling of non-driven work rolls. Therefore, it is possible to rearrange the work rolls easily and quickly.

[Brief explanation of the drawing]

Figures 1 to 4 show an example of the rolling mill of the present invention, with Figure 1 being a front view showing the rearranged state, Figure 2 being a side view as seen from the drive device side, and Figure 3 being the power source. 4 is a side view of the transmission device, FIGS. 5 and 6 show embodiments other than the present invention, and FIG. 5 is a sectional plan view of the power transmission device, and FIG. is the same side view. 1...Foundation 2.2'...Housing 3.3'...Work roll (old) 3 a + 3 a'...New work roll 4...
Gear box, 5-... Drive device (power transmission device) 7... Input shaft 12... Output shaft 13... Female spline 15... (gear box) bearing 14... Male spline 22 ···rail

Claims (5)

[Claims] (1) When replacing the work rolls of a work roll drive rolling mill, prepare a new work roll in advance on the working side or roll drive side of the housing, separate the old work roll and drive device, and replace the drive device with the work roll. A new work roll is loaded into the housing from one side of the housing, and an old work roll is pushed out of the housing from the other side. A method for rearranging work rolls in a rolling mill, characterized in that the work rolls are moved on a directional extension line and a drive device is connected to a new work roll. (2) The shaft end of the work roll provided in the housing and one end of the output shaft of the power transmission device that connects the input shaft to the drive source can be selectively connected by coupling, and
By rotatably supporting the input shaft side of the power transmission device and rotating the power transmission device around the pivot point,
The device is retracted from the axis of the work roll, a new work roll is placed on the same axis as the old work roll installed in the housing, the old work roll is pushed out from the housing, and the new work roll is installed in the housing. 1. A work roll changing device for a rolling mill, characterized in that the work rolls are inserted into the rolling mill. (3) The shaft end of the work roll provided in the housing and one end of the output shaft of the power transmission device that connects the input shaft to the drive source can be selectively connected by coupling, and the power transmission device can be slid. By sliding the power transmission device, the device is retracted from the axis of the work roll, the new work roll is placed coaxially with the old work roll provided in the housing, and the old work roll is removed from the housing. A work roll changing device for a rolling mill, characterized in that a new work roll is inserted into a housing while extruding a work roll. (4) The work roll changing device for a rolling mill according to claims 2 and 3, characterized in that only one of the pair of work rolls is driven. (5) The work roll changing device for a rolling mill as set forth in claims 2 and 3, characterized in that both of the pair of work rolls are driven.