JPH0726002Y2 - Rolling mill drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rolling mill drive device, and more particularly to a spindle device configured to be extendable and contractible.

[Prior art]

Generally, as a rolling mill, a pair of upper and lower work rolls are axially moved in order to simplify the work of exchanging work rolls and to switch the position of the work rolls when using a multi-caliber work roll in which a plurality of calibers are arranged in parallel. A shiftable rolling mill configured to be driven is known.

Usually, in the drive device of the above-mentioned shiftable rolling mill, a spindle shaft as a universal joy for transmitting a rotational driving force to a work roll is spline-fitted in a telescopic manner.
It is composed of a pair of spindle shaft members, and a connecting mechanism is attached to the spindle shaft member on the work roll side so as to be relatively rotatable and immovable in the axial direction, and the connecting mechanism is attached together with the spindle shaft member by a fluid pressure cylinder provided in the frame. It is configured to drive in the axial direction to expand and contract each spindle shaft [see Japanese Patent Laid-Open No. 59-229211].

[Problems to be solved by the device]

In the drive device of the shiftable rolling mill described above, a fluid pressure cylinder and a connecting mechanism for expanding and contracting each spindle shaft are arranged around the spindle shaft, and each of the spindle shafts is expanded and contracted individually. Since they are provided in pairs, there is a problem that the periphery of the spindle shaft becomes very complicated and the drive device becomes large.

In addition, since the spindle shaft that is driven to rotate is driven to expand and contract by the fluid pressure cylinder provided in the frame, it is necessary to provide each connecting mechanism so as to be rotatable relative to the spindle shaft member, which complicates the structure of the connecting mechanism. The production cost was expensive.

An object of the present invention is to provide a rolling mill drive device that is compact and can be manufactured at low cost.

[Means for Solving the Problems]

A rolling mill driving device according to the present invention includes a driving means including an electric motor, and a pair of driving means for transmitting a rotational driving force by the driving means to a pair of upper and lower work rolls with a multi-caliber provided on a mill stand. A first spindle having a spindle shaft, one end and the other end of each spindle shaft being connected to an output shaft of a drive means and a work roll through a universal joint, and each spindle shaft having a spline shaft portion When the mill stand is shifted, in a drive unit for a rolling mill, which comprises a shaft member and a second spindle shaft member having a spline fitting portion for spline fitting the spline shaft portion so as to be movable in the axial direction. In order to be movable in response to the work roll of the mill stand, each second spindle shaft member is provided with an axial direction in which it rotates integrally with the second spindle shaft member. A body pressure cylinder, wherein a fluid pressure cylinder for axially adjusting the position of the first spindle shaft member is attached to the second spindle shaft member, and the fluid pressure cylinder is rotatably provided at an intermediate portion in the axial direction of each of the second spindle shaft members. A holding member that is connected so as to be immovable in the axial direction, and a second member
A height position adjusting drive means for adjusting the position of the spindle shaft member in the vertical direction is provided.

[Action]

In the rolling mill driving apparatus according to the present invention, the rotational driving force of the driving means is transmitted to the pair of upper and lower work rolls with multi-caliber of the mill stand through the pair of spindle shafts. Each spindle shaft is composed of a first spindle shaft member having a spline shaft portion, and a second spindle shaft member having a spline fitting portion for spline fitting the spline shaft portion so as to be movable in the axial direction.

Inside each of the second spindle shaft members, an axially oriented fluid pressure cylinder that rotates integrally with the second spindle shaft member, and axially adjusts the position of the first spindle shaft member with respect to the second spindle shaft member. Attach a fluid pressure cylinder to
Since the fluid pressure cylinder is configured to rotate integrally with the spindle shaft, the connection structure between the fluid pressure cylinder and the first and second spindle shaft members can be significantly simplified.

Further, since the fluid pressure cylinder drives the first spindle shaft member in the axial direction with respect to the second spindle shaft member,
It is not necessary to dispose a fluid pressure cylinder or a connecting mechanism for connecting the fluid pressure cylinder and the spindle shaft around the spindle shaft, and the structure around the spindle shaft can be simplified.

In addition, a holding member that is rotatably and immovably connected to an axial middle portion of each second spindle shaft member and a height for vertically adjusting the position of the second spindle shaft member via the holding member. Since the height position adjusting driving means is provided, when the height position of the other end of the pair of spindle shafts is changed by shifting the mill stand, the pair of spindle members is moved by the holding member and the height position adjusting driving means. Can adjust the height position of the other end of the spindle shaft to support it properly.
Since the height positions of the other ends of the pair of spindle shafts can be adjusted even when the mill stand is replaced, the work efficiency of the work associated with the replacement of the mill stand can be increased.

[Effect of device]

According to the driving apparatus for a rolling mill of the present invention, a fluid pressure cylinder is mounted inside each second spindle shaft member so that the position of the first spindle shaft member can be axially adjusted with respect to the second spindle shaft member. As described above in the section [Operation], the fluid pressure cylinder and the first and second spindle shaft members are provided by providing a holding member and a height position adjusting drive means corresponding to each spindle shaft. The manufacturing cost can be reduced by simplifying the connection structure with, the structure around the spindle shaft can be simplified and the drive unit can be downsized, the spindle shaft can be properly supported according to the shift of the mill stand, the mill stand It is possible to improve the work efficiency of the work associated with the replacement of the.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

The present embodiment is a case where the present invention is applied to a drive device of a shiftable rolling mill that hot-rolls a steel material into an H-shaped steel.

As shown in FIGS. 1 and 2, a rolling mill 1 includes a pair of upper and lower horizontal work rolls 2 provided on a mill stand, and a chock 3 that rotatably supports both ends of each work roll 2.
And a rolling force applying mechanism (not shown) that applies a rolling force to the work roll 2, and a drive device 4 that rotationally drives the work roll 2.
And a housing 5 that supports the chocks 3 and a movement drive mechanism (not shown) that moves and drives the work roll 2 in the axial direction thereof. The work roll 2 is rotationally driven and a rolling force is applied to roll the steel material W. It is supposed to do. Reference numeral 6 is a vertical work roll for rolling the left and right flange portions of the steel material W which is an H-shaped steel.

The drive unit 4 supports a rotary drive mechanism 11 for rotating and driving each work roll 2 through a pair of upper and lower spindle shafts 10, and supports the self-weight of each spindle shaft 10, and also each spindle according to the size of the work roll 2. A support mechanism that drives and drives the open end 10a of the shaft 10 to the axial center position of each work roll 2.
12 and an expansion / contraction mechanism 13 for expanding / contracting the spindle shaft 10 in response to the movement of the work roll 2 in the axial direction.
It has and.

The rotation drive mechanism 11 will be described with reference to FIGS.
As shown in the figure, a connecting member 15 that is detachably fitted to the work roll 2 is connected to the tip end portion 10a of each spindle shaft 10 via a universal joint 14,
Numeral 15 is connected to the engaging shaft portion 2a at the left end portion of the work roll 2 so as to be movable in the axial direction and non-rotatably, and the base end portion 10b of each spindle shaft 10 is connected to the pinion stand 17 via a universal joint 16. The pair of upper and lower output shafts 17a are connected to each other, and the input shaft 17b of the pinion stand 17 is coupled to the coupling 1
The work rolls 2 are connected to each other via the electric motor 19 via 8 and are driven to rotate in opposite directions by the driving force of the electric motor 19.

The expansion / contraction mechanism 13 is for individually expanding / contracting each spindle shaft 10. As shown in FIG.
Reference numeral 10 is composed of a first spindle shaft member 20 and a hollow pipe-shaped second spindle shaft member 21.
A spline shaft portion 22 is formed over substantially the entire length of the shaft 20, and a spline fitting portion 23 for spline fitting with the spline shaft portion 22 is formed on the right inner peripheral portion of the second spindle shaft member 21. The first spindle shaft member 20 is telescopically spline-fitted to the second spindle shaft member 21.

An axially extending / contracting cylinder 24 is mounted in the left part of the second spindle shaft member 21 with its piston rod 24a directed to the right, and a cylinder body 24b of the expanding / contracting cylinder 24 is fixed at a substantially central portion thereof. Is rotatably connected to the second spindle shaft member 21 via a support shaft 25, and the piston rod 24a of the telescopic cylinder 24 is rotatably connected to the left end portion of the first spindle shaft member 20 via a connecting member 26. The pair of left and right hydraulic ports 27 of the expanding and contracting cylinder 24 are connected to and detached from a hydraulic hose 29 connected to an external hydraulic supply device via a quick coupling 28 provided on the outer peripheral portion of the second spindle shaft member 21. Each is connected as possible.

The support mechanism 12 supports the weight of each spindle shaft 10 and supports each spindle shaft 10 at its base end portion 10b.
It is for vertically moving around the universal joint 16 connected to the above to support the tip portion 10a at a predetermined position. As shown in FIGS. 2 and 3, the shaft of each second spindle shaft member 21 is A pair of annular locking portions 30 are formed at a substantially central portion in the direction of the projection so as to be spaced apart from each other by a predetermined distance. Between the locking portions 30, a substantially annular holding member 31 is axially immovable and the bearing metal 32 is provided.
Each of the spindle shafts
A pair of support cylinders 33 and 34 are erected below the lower side of the 10, and a holding member 31 mounted on the lower spindle shaft 10 is connected to a piston rod 33a of the support cylinder 33.
A holding member 31 mounted on the upper spindle shaft 10 is provided with a support sealer 34 via an arm member 35 and a rotating member 36.
Each spindle shaft 10 is individually moved up and down around the universal joint 16 by the support cylinders 33 and 34.

Next, the operation of the drive device 4 will be described.

At the time of rolling work, the connecting member 15 is used as the engaging shaft of the work roll 2.
In the state where the hydraulic hose 29 is connected to the 2a and is disconnected from the quick coupling 28, the electric motor 19 is driven and the steel material W inserted between the work rolls 2 is fed and driven through the rolling force adding mechanism while rolling. To do.

When exchanging the mill stand, that is, when exchanging the work roll 2, 29 hydraulic hoses are connected to the respective hydraulic ports 27 of the respective telescopic cylinders 24 via the couplings 28, and the respective telescopic cylinders are extended.
The first spindle shaft member 20 is housed in the second spindle shaft member 21 by driving 24. Next, the work roll 2 together with the chocks 3 is moved from the rolling work station to the roll exchanging station on the right side thereof by the movement drive mechanism, and each work roll 2 is exchanged together with the chocks 3. Next, drive each support cylinder 33/34 to drive each spindle shaft 10
Is moved up and down to move the tip end portion 10a of each spindle shaft 10 to the axial center position of the work roll 2 to be replaced. Then, the replaced work rolls 2 are returned to the rolling work station together with the chocks 3, and the engaging shaft portion 2a of each work roll 2 and the connecting member 15 are connected by the telescopic cylinder 24.

When changing the size of the H-section steel during the rolling work by the work roll with the multi-caliber capable of rolling the H-section steels of various sizes, the electric motor 19 is stopped and each expansion / contraction cylinder 24.
Hydraulic hose via coupling 28 to each hydraulic port 27
29 are connected to each other, and the expansion / contraction cylinder 24 is driven in synchronization with the movement of the work roll 2 by the movement drive mechanism so that the engagement between the coupling member 15 and the engagement shaft of the work roll 2 is not disengaged. Move the desired caliber to the position opposite W.

Here, in the drive unit 4, each spindle shaft 10
An extension / contraction cylinder 24 for extending / contracting is provided inside the second spindle shaft member 21, and even if each spindle shaft 10 is rotationally driven, the extension / contraction cylinder 24, the first spindle shaft member 20, and the second spindle shaft member 21 Does not rotate relatively, so
The piston rod 24a of the telescopic cylinder 24 and the first spindle shaft member 20 can be connected by the connecting member 26 having a simple structure.
Further, since the expansion / contraction mechanism 13 is incorporated in each spindle shaft 10, the configuration around the relatively complicated spindle shaft 10 on which the support mechanism 12 is installed can be greatly simplified.

As described above, since the expansion / contraction mechanism 13 is incorporated in each spindle shaft 10, the expansion / contraction mechanism 13 is downsized and the spindle shaft 10
Cylinder for expansion and contraction, which can greatly simplify the surrounding structure
Since the piston rod 24a of 24 and the first spindle shaft member 20 can be connected by the connecting member 26 having a simple structure, the expansion and contraction mechanism 13
It is possible to obtain an effect such that the number of parts constituting the device can be significantly reduced and the manufacturing cost can be significantly reduced.

The expansion / contraction cylinder 24 is mounted inside the second spindle shaft member 21 so that the piston rod 24a extends to the left, the expansion / contraction cylinder 24 is fixed to the first spindle shaft member 20, and the piston rod 24a is fixed to the first spindle shaft member 20. It may be connected to the two-spindle shaft member 21.

Further, a rotary joint may be provided on the outer peripheral portion of each second spindle shaft member 21, and each hydraulic port 27 of the expansion / contraction cylinder 24 and the hydraulic hose 29 may be constantly connected via this rotary joint. In this case, each connecting member
When 15 is connected to the engaging shaft portion 2a of each work roll 2 in advance by a pin member or the like, each telescopic cylinder 24 can be driven to move each work roll 2 in its axial direction during rolling work. Can be done.

[Brief description of drawings]

1 shows a plan view of a rolling mill, FIG. 2 is a front view of the rolling mill, and FIG. 3 is a longitudinal sectional view of a spindle shaft. 1 ... rolling mill, 2 ... work roll, 4 ... drive device, 10
...... Spindle shaft, 12 ...... Support mechanism, 19 ...... Electric motor, 20 ...... First spindle shaft member, 21 ...... Second spindle shaft member, 22 ...... Spline shaft part, 23 ...... Spline fitting part, 24 …… Extension cylinder, 24a …… Piston rod, 24b …… Cylinder body, 31 …… Holding member, 33,34 ……
Support cylinder, 35 ... Arm member, 36 ... Rotating member.

Claims (1)

[Scope of utility model registration request] 1. A driving means including an electric motor, and a rotary driving force generated by the driving means is respectively transmitted to a pair of upper and lower work rolls with a multi-caliber provided on a mill stand.
A pair of spindle shafts, one end and the other end of each spindle shaft are respectively connected to the output shaft of the drive means and the work roll through a universal joint, and each spindle shaft has a spline shaft portion. A rolling mill drive apparatus comprising one spindle shaft member and a second spindle shaft member having a spline fitting portion for spline fitting the spline shaft portion so as to be movable in the axial direction. In order to be movable in response to the work roll of the mill stand at the time, a fluid pressure cylinder in an axial direction that rotates integrally with each second spindle shaft member is provided. A fluid pressure cylinder for axially adjusting the position of the first spindle shaft member with respect to the second spindle shaft member is attached, and the fluid pressure cylinder is freely rotatable in the axial middle portion of each of the second spindle shaft members. And a holding member connected immovably in the axial direction, and a height position adjusting drive means for adjusting the position of the second spindle shaft member in the vertical direction via the holding member. Rolling mill drive.