JPH0649364Y2 - Roll drive for rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a roll driving device for a rolling mill.

[Prior Art] Conventionally, a roll drive device as shown in FIG. 5 has been used in a rolling line such as an electric resistance welded steel pipe production line. That is, FIG. 5 shows an example in which the forming roll 3 (upper roll 3A, lower roll 3B) supported by the roll housing 2 of the forming stand 1 for producing electric resistance welded steel pipe is moved by the prime mover (electric motor) 4. Is. This drive device is supported by the speed reducer 5 and is connected to the drive unit 4 by a drive shaft 6 (upper drive shaft 6A, lower drive shaft 6B) and a universal joint 7 (upper joint 7A, lower joint 7B) on the drive shaft 6. ) And an intermediate shaft 8 (upper intermediate shaft 8A, lower intermediate shaft 8B) that is connected via
And a connecting shaft 10 (upper connecting shaft 10A, lower connecting shaft 10B) connected to the intermediate shaft 8 via a universal joint 9 (upper connecting shaft 9A, lower connecting shaft 9B).
have. In addition, the drive device is supported by the roll housing 2 and coupled with the roll 3, and also has a connecting shaft.
A driven shaft 11 (upper driven shaft) that is detachably attached to the roller 10 and that transmits the rotational force of the prime mover 4 to the roll 3 in a state of engaging with the connecting shaft 10.
11A, lower driven shaft 11B). The connecting shaft 10 and the driven shaft 11 can be engaged and disengaged via a key joint 12 and can be kept connected by a bolt 13.

Here, the position of the driven shaft 11 supported by the roll housing 2 of the roll stand 1 varies depending on the diameter of the roll 3 corresponding to the diameter of the pipe to be manufactured and the rolling position. By interposing the universal joints 7 and 9 and the expandable intermediate shaft 8 between the driving shaft 6 and the driven shaft 11, the driving device can absorb the change in the set position of the driven shaft 11.

By the way, in the roll stand 1, when the rolls are exchanged by changing the diameter of the pipe to be manufactured, the connection between the connecting shaft 10 and the driven shaft 11 is removed, and the driven shaft 11 is moved freely. It is necessary to exchange the rolls and to reconnect the connecting shaft 10 and the driven shaft 11 after the rolls are exchanged.

The connection / disconnection work of the connecting shaft 10 and the driven shaft 11 is performed as follows.

Call Crane 14.

The intermediate shaft 8 and the connecting shaft 10 are held near the universal joint 9 by two wires 15 and 16.

Loosen the bolt 13.

The spline part 8A of the intermediate shaft 8 is shortened by the crane 14 and human power, the key joint 12 is disconnected, and the connecting shaft 10 is driven.
Remove from 11.

The intermediate shaft 8 and the connecting shaft 10 are placed on a stand, and the wires 15 and 16 are removed.

The connecting work between the connecting shaft 10 and the driven shaft 11 is performed as follows.

The intermediate shaft 8 and the connecting shaft 10 are lifted up near the universal joint 9 with the two wires 15 and 16.

The connecting shaft (10) is aligned with the driven shaft (11) by the crane (14).

Manually rotate the driven shaft 11 to align the key joint 12.

The spline portion 8A of the intermediate shaft 8 is extended by the crane 14 and human power to connect the key joint 12.

The connecting state of the connecting shaft 10 and the driven shaft 11 is fixed by the bolt 13.

Remove wires 15 and 16.

[Problems to be Solved by the Invention] However, in the above-described conventional roll drive device,
For connection / disconnection of connecting shaft 10 and driven shaft 11,
There are the following problems.

It uses the crane 14 and human power, and the working time is long.

Bolt 13 may be loose.

It is heavy labor.

In Japanese Utility Model Publication No. 55-4086, a spindle for connecting a driven roll shaft of a rolling mill, a shaping machine or the like and a drive shaft of a driving prime mover, that is, a connecting shaft is made expandable and a supporting shaft for the connecting shaft is provided. It is disclosed that the apparatus is provided with a moving mechanism used for attachment / detachment with a roll shaft and a chucking position adjustment used for centering with the roll shaft center, that is, a centering mechanism. However, in this conventional technique, the connecting shaft needs to be chucked, unchucked, and retracted by the supporting device of the connecting shaft before and after the roll replacement of the rolling mill and the like, which complicates the operation and supports the connecting shaft. There is a possibility that the chucking position of the connecting shaft by the device will be made at an unspecified position, the movement stroke of the support device for connecting the roll shaft and the connecting shaft will not be constant, and confirmation of completion of connection etc. The support device for the connecting shaft releases the chucking of the connecting shaft after changing the rolls of the rolling mill, etc., so the telescopic intermediate shaft contracts and drops during operation of the rolling mill. However, there is a risk that a serious accident such as swinging of the universal joint may occur.

An object of the present invention is to connect, disconnect and connect a driving side connecting shaft and a roll side driven shaft in a short time, reliably, easily and safely.

[Means for Solving the Problems] The present invention provides a drive shaft supported by a speed reducer and connected to a drive device, an expandable intermediate shaft connected to the drive shaft through a universal joint, and an intermediate shaft. A coupling shaft that is connected through a universal joint and a roll housing that is supported by the roll housing and is coupled to the coupling shaft, and is attached to and detached from the coupling shaft. In a roll driving device for a roll-up type rolling mill having a shaft, a connecting shaft support housing that constantly supports the connecting shaft at a fixed position in the axial direction, and the connecting shaft support housing is moved with respect to the roll housing. Then, the attaching / detaching device for attaching / detaching the connecting shaft supported by the connecting shaft supporting housing to the driven shaft supported by the roll housing is disposed in the connecting shaft supporting housing and supported by the connecting shaft supporting housing. And a centering device for aligning the axis of the connecting shaft with the axis of the driven shaft supported by the roll housing.

[Operation] According to the present invention, the connecting / disconnecting work of the connecting shaft and the driven shaft is performed as follows.

The connecting shaft supported by the connecting shaft support housing is driven by the attaching / detaching device so that the connecting shaft supported by the connecting shaft support housing is supported by the roll housing. Be separated from.

Further, the connecting work between the connecting shaft and the driven shaft is performed as follows.

The centering device aligns the axis of the connecting shaft supported by the connecting shaft support housing with the axis of the driven shaft supported by the roll housing.

The driven shaft is manually rotated to align the connecting shaft and the driven shaft with each other.

The attachment / detachment device moves the connection shaft support housing with respect to the roll housing, and connects the connection shaft supported by the connection shaft support housing and the driven shaft supported by the roll housing. This connection state is held by the attachment / detachment device.

Therefore, according to the present invention, there are the following effects.

The connecting shaft support housing always supports the connecting shaft. Therefore, the connecting shaft continues to be supported by the connecting shaft support housing not only during roll replacement but also during operation of the rolling mill. Therefore, operations such as chucking, chucking release, and retreating of the connecting shaft with respect to the connecting shaft support housing are unnecessary, and operability is good. That is, the connection / disconnection of the connecting shaft and the driven shaft and the connecting work can be easily performed in a short time.

The connecting shaft is always supported by the connecting shaft support housing at a fixed position in the axial direction. Therefore, after the driven shaft and the connecting shaft have been aligned with each other, the connecting shaft supporting housing is moved by a certain stroke to complete the connection, and it is not necessary to visually confirm the completion of the connecting process. That is, the connection and disconnection of the connecting shaft and the driven shaft and the connecting work can be performed reliably and easily.

As described above, the connecting shaft is supported by the connecting shaft supporting housing during the operation of the rolling mill. Therefore, there is no risk that the telescopic intermediate shaft contracts and falls off during operation of the rolling mill, causing a serious accident such as swinging of the universal joint, which is safe.

[Embodiment] FIG. 1 is a front view showing an embodiment of the present invention, and FIG.
Fig. 3 is a front view showing the connection / disconnection state in Fig. 3, and Fig. 3 is II in Fig. 1.
FIG. 4 is a cross-sectional view showing the connection structure of the connecting shaft and the driven shaft, taken along the line I-III.

In this embodiment, as shown in FIGS. 1 and 2, a forming roll 23 (an upper roll 23A, a lower roll 23) supported by a roll housing 22 of a forming roll stand 21 for producing electric resistance welded steel pipe.
This is an example in which B) is driven by a prime mover (electric motor) 24. This drive device is supported by the speed reducer 25,
Drive shaft 26 connected to 24 (upper drive shaft 26A, lower drive shaft 26B)
And a spline part 28C that is connected to the drive shaft 26 via a universal joint 27 (upper joint 27A, lower joint 27B) and is expandable and contractible.
With an intermediate shaft 28 (upper intermediate shaft 28A, lower intermediate shaft 28B) and a connecting shaft 30 (upper connecting shaft 30A, lower connecting shaft 30A, which is connected to the intermediate shaft 28 via a universal joint 29 (upper joint 29A, lower joint 29B). It has a continuous shaft 30B). In addition, this drive device is also provided with a roll housing 22
It has a driven shaft 31 (an upper driven shaft 31A, a lower driven shaft 31B) that is supported by and is coupled to the roll 23, is detachably attached to the coupling shaft 30, and transmits the rotational force of the driving device 24 to the roll 23. . In addition, 101 is a chock of the driving shaft 26, and 102 is a chock of the driven shaft 31.

As shown in FIG. 4, the connecting shaft 30 and the driven shaft 31 are engaged and disengaged via a key joint 32 (key 32A and key groove 32B), and a guide shaft for smoothly guiding the engaged state. It has 33A and a guide hole 33B.

Here, the position of the driven shaft 31 supported by the roll housing 22 of the roll stand 21 varies depending on the diameter of the roll 23 corresponding to the pipe diameter to be manufactured and the rolling position. By interposing the universal joints 27 and 29 and the expandable intermediate shaft 28 between the drive shaft 26 and the driven shaft 31, the drive device can absorb the change in the set position of the driven shaft 31.

By the way, in the roll stand 21, when the rolls are exchanged by changing the diameter of the pipe to be manufactured, etc., the connection shaft 30 and the driven shaft 31 are disconnected, and the driven shaft 31 is freely placed above the roll housing 22. It is necessary to move the rolls so that the rolls can be pulled out and to exchange the rolls, and after the rolls have been exchanged, the connecting shaft 30 and the driven shaft 31 should be connected again.

In the drive device of this embodiment, the connecting shaft 30 and the driven shaft 31
It has the following structure for connection / disconnection / connection.

That is, in this embodiment, the connecting shaft support housing 41, the attaching / detaching device 42, and the aligning device 43 are provided.

The connecting shaft support housing 41 is a chock 103 (upper chock 103
A, the lower chock 103B) always supports the connecting shaft 30 at a fixed position in the axial direction, and supports the roll housing 22 as a supporting shaft.
Can swing around 44. 45 is a connecting shaft support housing 41
Reference numeral 46 denotes a slide portion provided on the roll housing 22 and a guide groove provided on the roll housing 22 to guide the slide portion 45.

The attachment / detachment device 42 is interposed between the roll housing 22 and the connecting shaft support housing 41. For example, the connecting shaft support housing 41 is composed of an electric cylinder and is moved with respect to the roll housing 22, and the connecting shaft 30 supported by the connecting shaft support housing 41 is attached to and detached from the driven shaft 31 supported by the roll housing 22. This attachment / detachment is performed by engaging / disengaging the key joint 32 through the guide action of the guide shaft 33A and the guide hole 33B provided on the connecting shaft 30 and the driven shaft 31.

The aligning device 43 is disposed in the connecting shaft support housing 41, and the axis of the connecting shaft 30 supported by the connecting shaft support housing 41 is aligned with the axis of the driven shaft 31 supported by the roll housing 22. To match.

In this embodiment, as shown in FIG.
Of the left-hand threaded portion 48 and right-hand threaded portion 49 of the
At 0 and 51, the upper chock 103A has the sliding groove 52 of the housing 41.
The upper connecting shaft 30A is centered on the upper driven shaft 31A. In addition, the screw shaft for lower alignment 5
The lower chock 103B is guided by the sliding groove 52 of the housing 41 and vertically moved by the receiving tool 54 of 3, and the lower connecting shaft 30B is aligned with the lower driven shaft 31B.

In addition, the upper alignment screw shaft 47 of the alignment device 43, the lower alignment screw shaft
53 may be driven by a manual handle or by a motor.

Next, the operation of the above embodiment will be described.

According to the above embodiment, the connecting / disconnecting work of the connecting shaft 30 and the driven shaft 31 is performed as follows.

By simply swinging the connecting shaft support housing 41 with respect to the roll housing 22 by the attaching / detaching device 42, the connecting shaft 30 supported by the connecting shaft support housing 41 is driven by the driven shaft 31 supported by the roll housing 22. Is cut off (this work time is about 3 seconds).

Further, the connecting work of the connecting shaft 30 and the driven shaft 31 is performed as follows.

The axis of the connecting shaft 30 supported by the connecting shaft support housing 41 is aligned with the axis of the driven shaft 31 supported by the roll housing 22 by the aligning device 43.

The driven shaft 31 is manually rotated so that the connecting shaft 30 and the driven shaft 31 can be keyed to each other.

The attachment / detachment device 42 swings the connecting shaft support housing 41 with respect to the roll housing 22 to move the connecting shaft support housing 41.
The connecting shaft 30 supported by the roller housing 22 and the driven shaft 31 supported by the roll housing 22 are connected. This connection state is held by the attaching / detaching device 42.

Therefore, according to the above embodiment, there are the following effects.

The connecting shaft support housing 41 always supports the connecting shaft 30.
Therefore, the connecting shaft 30 continues to be supported by the connecting shaft support housing 41 not only during roll replacement but also during operation of the rolling mill. Therefore, the connecting shaft with respect to the connecting shaft support housing 41
It does not require operations such as 30 chucking, chucking release, and evacuation, and has good operability. That is, the connection / disconnection of the connecting shaft 30 and the driven shaft 31 and the connecting work can be easily performed in a short time.

The connecting shaft 30 is always supported by the connecting shaft support housing 41 at a fixed position in the axial direction. Therefore, the driven shaft 31 and the connecting shaft 30
After centering, the connecting shaft support housing 41 is moved by a constant stroke to complete the connection, and the work of confirming the completion of the connection by visual inspection or the like is unnecessary. That is, the connecting shaft 30 and the driven shaft
Connection and disconnection with 31 and connection work can be performed reliably and easily.

As described above, the connecting shaft 30 is supported by the connecting shaft support housing 41 during the operation of the rolling mill. Therefore, there is no risk that the telescopic intermediate shaft 28 contracts and falls off during the operation of the rolling mill, causing a serious accident such as swinging of the universal joint 29, which is safe.

[Effects of the Invention] As described above, according to the present invention, connection and disconnection between the connecting shaft on the driving side and the driven shaft on the roll side can be carried out reliably and continuously in a short time without a large number of workers. And it can be done by light work.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a first view.
Fig. 3 is a front view showing the connection / disconnection state in Fig. 3, and Fig. 3 is II in Fig. 1.
FIG. 4 is a cross-sectional view showing a connecting structure of a connecting shaft and a driven shaft, and FIG. 5 is a front view showing a conventional example. 22 …… Roll housing, 23 …… Roll, 24 …… Driving device, 25 …… Driving side housing, 26 …… Driving shaft, 27 …… Universal joint, 28 …… Intermediate shaft, 29 …… Universal joint, 30… … Coupling shaft, 31 …… Driven shaft, 41 …… Coupling shaft support housing, 42 …… Removal device, 43 …… Aligning device.

Claims (1)

[Scope of utility model registration request] 1. A drive shaft supported by a speed reducer and connected to a drive unit, an expandable intermediate shaft connected to the drive shaft via a universal joint, and connected to the intermediate shaft via a universal joint. A roll having a connecting shaft and a driven shaft that is supported by the roll housing and is coupled to the roll, is detachably attached to the connecting shaft, and transmits the rotational force of the prime mover to the roll in a state of engaging with the connecting shaft. In a roll driving device for a top-down rolling mill, a connecting shaft support housing that constantly supports the connecting shaft at a fixed position in the axial direction, and the connecting shaft support housing is moved with respect to the roll housing and supported by the connecting shaft support housing. The device for attaching / detaching the connected connecting shaft to / from the driven shaft supported by the roll housing, and the shaft center of the connecting shaft mounted on the connecting shaft supporting housing and supported by the connecting shaft supporting housing. Rolling mill roll drive of a roll on 抜式 characterized by comprising and a centering device for aligning the core with the axis of the driven shaft supported by the managing.