JPS5856652B2 - universal rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a universal rolling mill for rolling shaped steel, and more particularly to a universal rolling mill equipped with a roll changing mechanism that allows rolls to be changed quickly and easily.

Generally, a universal rolling mill is a rolling mill that rolls a shaped steel having wide parallel flanges, such as an H-shaped steel, and is provided with a pair of parallel vertical rolls and a horizontal roll.

In this universal rolling mill, a pair of horizontal rolls are driven, and a pair of vertical rolls are rotated by friction through the material to be rolled.

Each of these horizontal rolls and each vertical roll can be pressurized independently, so it is possible to roll an H-beam of the required thickness, and it is also easy to roll an H-beam with a wide flange and thin web. It can be done.

However, since rolling mills for shaped steel produce a wide variety of products in small quantities, the production rods are small and the rolls need to be changed frequently.

In the case of a short time, the rolls must be rearranged at intervals of 2 to 3 hours from one roll rearrangement to the next roll rearrangement, and on average 7 to 8 hours.

Therefore, the length of the roll changeover time affects the trend in the equipment operating rate of the rolling mill, which in turn affects the production capacity of the rolling mill.

Conventionally, such universal rolling mills for shaped steel have generally been widely adopted, such as the 75"-X type, in which a housing for vertical rolls and a housing for horizontal rolls are integrally constructed, as shown in Fig. 1. The universal rolling mill supports the rolling reaction force applied to the vertical rolls...The flange is located at the height of the center of the pass and is integrated with the horizontal roll housing on the outside in the axial direction of the horizontal roll.
When changing the rolls, the vertical roll housing became an obstacle, making it extremely difficult to pull out the rolls.

For such a universal rolling mill, as shown in FIG. 2, the roll changing operation involves taking out the upper horizontal roll b using the C hook a to a position outside the housing C shown by the two-dot chain line, and then This is done by sliding the vertical roll d left and right, removing the vertical roll d using a crane, and finally taking out the lower horizontal roll e to the outside of the housing C using the C hook a. The installation work is carried out in the opposite direction.

In order to change the rolls of such conventional universal rolling mills, the horizontal rolls and vertical rolls must be changed separately, which requires a large amount of time and significantly reduces productivity. I was letting it happen.

In order to reassemble the twisted vertical rolls, it is necessary to slide the vertical rolls from side to side at position 1 where reassembly work is possible, and the horizontal length of the nozzling for the vertical rolls must be lengthened. There was a drawback that it had to be done.

In order to correct this drawback, rolling mills have been proposed in which the vertical roll housing has a hinged structure that allows it to be opened and closed by rotation, or in which the vertical roll housing can be connected with a detachable button.

This makes it possible to simultaneously rearrange the upper and lower horizontal rolls and the left and right vertical rolls at the same time, making it possible to considerably shorten the rearrangement time.

However, when changing the rolls, a spacer is installed between the vertical roll bearing box, the upper horizontal roll bearing box, and/or the lower horizontal roll bearing box to prevent damage caused by contact between the bodies of the upper and lower horizontal rolls. etc. were interpolated.

These spacers and the like are necessary when changing the rolls, but they get in the way during rolling, so they are manually installed and removed when changing the rolls.

However, the spacers weigh approximately 20 to 90%, making it difficult to work with, and the drive shafts for the upper and lower horizontal rolls are located on the drive side of the rolling mill, making the work space narrow and the footing poor, making it dangerous. As a result, the working conditions for manually attaching and detaching the spacer were extremely unfavorable.

For this reason, it has become difficult to shorten the time required for roll changing operations and to automate the roll changing process, making it difficult to improve the operating rate of the rolling mill.

In addition, since it is a universal rolling mill in which the vertical roll bearing box is guided in the housing up and down, right and left buttons, and in the horizontal roll axis direction during rolling, it is difficult to reliably automate the roll change of the vertical roll bearing box. Met.

A method has also been proposed in which the lower part of the vertical roll bearing box is supported by multiple support rods that can be moved up and down, but the vertical clearance between the vertical roll bearing box and the vertical roll housing is the minimum clearance that allows sliding. , for example, about 0.4 mm, there is a risk of pushing up the vertical roll bearing box, and it is not easy to adjust the length of the support rod.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide a universal rolling mill that can shorten the changeover time and improve productivity.

The present invention provides an upper horizontal roll bearing phase rotation and a lower horizontal roll bearing box that respectively support a pair of upper and lower horizontal rolls, and each vertical roll bearing box that is located between the upper and lower sides of each of these bearing boxes and that supports a pair of left and right vertical rolls, respectively. An engaging rod for engaging the bearing boxes of the upper horizontal roll and the lower horizontal roll with each other is provided so as to penetrate the vertical roll bearing box, and the lower end of the engaging rod is provided. The lower horizontal roll bearing box is placed movably on a rail for roll changing that is attached to the lower part of the housing in a vertically movable manner, and the corners of the vertical roll bearing box are rounded to create a vertical roll bearing box. In order to facilitate loading into the vertical roll housing, an engaging portion is provided on the lower surface of the vertical roll bearing box to engage with the upper surface of the lower horizontal roll bearing box, and the lower horizontal roll bearing box is connected to the lower horizontal roll bearing box when the rolls are changed. The rail is stopped by a slotper so that the rail is engaged with the vertical roll bearing box and a gap is created between the upper surface of the lower horizontal roll bearing box and the lower surface of the vertical roll bearing box, and these horizontal rolls and vertical rolls are It is characterized in that it can be engaged all at once and rearranged and moved along the rail.

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

A housing 1 for horizontal rolls is shown in FIGS. 3 and 4 showing a front view and a side view, respectively, of a universal equipped with a roll changing mechanism of the present invention facing the rolling state of a rolling mill and from the rolling direction. is located on the operating wind drive side, and the upper horizontal roll 3 is supported by a bearing (not shown) in the upper horizontal roll bearing box 2, and is provided in the housing 1 so as to be vertically movable by an axial support device (not shown).

The upper horizontal roll 3 is lifted upward by a roll balance device 4, and the position of the upper horizontal roll 3 is adjusted by rotating a reduction screw 5 via a worm reducer 6 by an electric motor (not shown).

The lower horizontal roll 8 is supported by a bearing (not shown) in a lower horizontal roll bearing box 9, and is mounted on the cylinder 1 so as to be movable up and down by an axial support device (not shown), and is pushed up by an electric motor (not shown) via a worm reducer 15. By turning the screw 16, the position of the lower horizontal roll 8 is adjusted.

The vertical roll 22 on the operation side is supported by a bearing (not shown) in a vertical roll bearing box 7, and is pulled in the opening direction by a roll balance device (not shown), and is opened on the operation side by rotating the reduction screw 20 by a rolling electric motor and a worm reducer (not shown). The position of the vertical roll 22 is adjusted.

The cylinder 19 for the vertical roll on the operation side that supports the rolling reaction force of the vertical roll 22 is equipped with a roll balance device (shown in the figure), a reduction motor, and a worm speed reducer.
In this state at the time of roll rearrangement, a planar opening is formed on the operating side of the cylinder 1 and is configured to be openable and closable to facilitate the roll rearrangement work.

The vertical roll 28 on the driving side is supported by a bearing (not shown) in the vertical roll bearing box 7, and is equipped with a roll balance device, a rolling down motor, and a worm reducer (not shown) like the operating side. roll 28
The position is adjusted.

The driving-side vertical roll housing 18 supports the rolling reaction force of the vertical rolls 28.

In this embodiment, in addition to the above-mentioned normal basic structure of a universal rolling mill, a rail 13 for changing rolls is provided at the bottom of the housing 1 in the operation direction, and a cylinder 14 attached to the housing 1 It is movable up and down.

The housing 1 is provided with a stopper 11 for aligning the running surfaces of the rail 13 and the outer rail 27 and for positioning the vertical roll bearing box 7 and the lower horizontal roll bearing box 9, which will be described later.

On the other hand, an engaging rod 10 having a wheel receiving portion 25 at its lower end that supports the wheel 12 is placed on the rail 13 so as to be able to run freely, and this engaging rod 10 can be moved up and down when the rail 13 is rearranged. The upper and lower horizontal roll bearing boxes 2 move up and down with the movement.
and 9 are engaged with each other via a vertical roll bearing box T.

That is, the lower horizontal roll bearing box 9 is formed with a through hole through which the engaging rod 10 passes, and the lower surface of the bearing box is provided with an engaging recess 24 for engaging the upper surface of the wheel bearing part 25 of the engaging rod 10 that rises when the rolls are changed. In addition, the lower surface of the upper horizontal roll bearing box 2 is provided with an engagement recess 17 for the upper end of an engagement rod that is clicked when changing rolls.

Further, the vertical roll bearing box 7 disposed between the upper and lower horizontal roll bearing boxes 2 and 9 is provided with a through hole 21 through which the engagement rod 10 passes, and a vertical roll bearing box is provided on the lower surface of the bearing box. For rolls: When there is a vertical roll bearing box 7 in the cylinder 18゜19, when changing the rolls, engage rod 1
A protrusion 23 is formed to engage the upper and side surfaces of the lower horizontal roll bearing box 9, which is pushed upward by being pushed upward, with a gap 29 between the horizontal roll axis direction and the horizontal roll perpendicular direction.

The through hole 21 is an elongated hole extending along the horizontal roll axis direction to enable movement adjustment of the vertical roll 22 in this direction.

In addition, as shown in FIGS. 5 and 7, each corner of the upper and lower surfaces of the bearing box is located above and below the height of the gap 29 formed by the protrusion 23 for smooth attachment to the cylinder. A cut-off portion 33 is formed which is approximately two lengths larger in the direction and approximately three times as long in the horizontal direction.

The operation of the rolling mill according to the embodiment of the present invention having the above-described structure will be described below.

During rolling, as shown in Figures 3 and 4, the rail 13
The wheel 12, wheel receiver 25, and engagement rod 10 placed thereon are also descending due to their own weight, so the engagement recess 17 of the upper horizontal roll bearing box 2 touches the engagement rod. It is not in contact with the upper end of 10.

Further, since the through hole 21 of the vertical roll bearing box 7 is an elongated hole, the position of the vertical rolls 22 and 28 can be adjusted horizontally without any trouble. 23 and the upper part of the lower horizontal roll bearing box 9, a gap 40 is formed between the vertical rolls 22.
There is no problem with the upward positional relationship during rolling of No. 28.

Next, the roll changing mechanism will be explained with reference to FIG.

After each vertical roll bearing box 7 on the operation side and drive side is adjusted to the rearrangement position in the horizontal direction, the relationship with the vertical roll balance device and the vertical roll reduction screw 20 (not shown) is separated, and the vertical roll housing 19 on the operation side is removed. Open it to form a planar opening on the operation side.

Next, by rotating the worm reducer 6 and the reduction screw 5 by an electric motor (not shown), the upper horizontal roll 3 is raised at the upper limit by the roll balance device 4.

Here, by raising the push-up cylinder 14, the rail 13 is raised, a part of the rail 13 is brought into contact with the stopper 11 attached to the housing 1, and the rail 13 is accurately positioned in the rearrangement height direction, and the outer rail It matches the same height as 27.

On the other hand, as the rail 13 rises, the wheel 12, wheel receiver 25, and rod 10 are raised, and the upper part of the wheel receiver 25 and the lower horizontal roll bearing box 9 come into contact with each other at the recess 24, and the lower horizontal roll 8 is further moved into the rolling state. raise it more.

The upper part of the lower horizontal roll bearing box 9 engages with the protrusion 23 of the vertical roll bearing box 7 with a gap 29, so that the vertical roll bearing box 7 is connected to the horizontal direction of the horizontal roll axis and the horizontal roll axis when changing the rolls. Becomes able to receive forces in the horizontal and right angle directions.

Further, the lower horizontal roll bearing box 9 is raised until the gap 29 between the vertical roll bearing box 7 and the upper surface of the lower horizontal roll bearing box 9 becomes 5 diagonals from 1 mm.

Note that the gap 29 between the upper surface of the lower horizontal roll bearing box 9 and the vertical roll bearing box 7 is determined by setting the abutting position of the rail 13 and the stopper 11, and this gap 29 can be adjusted as long as the stopper 11 can be adjusted. can be changed to

This gap 29 is provided to prevent the vertical roll bearing box 7 from being pushed up by the lower horizontal roll bearing box 9.

Next, the roll balance device 4 is lowered to lower the upper horizontal roll 3, and the tip of the rod 10 is engaged with the recess 17 of the upper horizontal roll bearing box 2 so that it can receive the horizontal force when changing the rolls. do.

If the roll balance device 4 is lowered a little from this state so that the upper horizontal roll bearing box 2 and the roll balance device 4 do not come into contact with each other, the bodies of the upper and lower horizontal rolls 3 and 8 will not come into contact with each other. A gap will be formed automatically.

Next, the push-up screw 16 is lowered by rotating the worm reducer 15 by an electric motor (not shown), and the upper and lower horizontal rolls 3
, 8 from the axial support device (not shown).

After the above-mentioned work is completed, the tip 30 of the push/pull device (not shown) is moved forward to hook the drawer portion 31 onto the hook 26 of the lower horizontal roll bearing box 9, and the push/pull device 30 is moved to the operation side in the horizontal roll axis direction. When retracted, the upper horizontal roll 3, the lower horizontal roll 8, the operating side vertical roll 22, and the driving side vertical roll 28 are simultaneously pulled out and engaged with the lower surface of the vertical roll bearing box 7 through the gap 29. Lower horizontal roll bearing box 9
When it is pulled out of the housing 1, the vertical roll bearing box 7 is directly placed thereon as shown by the two-dot chain line in FIG.

Thereafter, when installing a new roll, the above procedure can be reversed.

In the case of installing a new roll, even if the vertical roll bearing box 7 is placed on the lower horizontal roll bearing box 9, the cut-off portion 33
It smoothly engages with the mounting part of the housing 1 along the slope of the housing 1 and is mounted on the housing without being restricted by the projection part 23.

As described above, according to this embodiment, the rolling mill roll...
A rail 13 for rearrangement is provided on the cylinder 1 so as to be movable up and down, and an engagement rod 1 is placed on the rail 13 so as to be freely movable.
0 so that the bearing boxes 2 and 9 of the upper and lower horizontal rolls are engaged with each other via the vertical roll bearing box 7, and the lower surface of the vertical roll bearing box 7 is connected to the upper surface of the lower horizontal roll bearing box 9. ...If there is a vertical roll bearing box 7 in the cylinder 18.19, there is a gap 29, and the vertical roll bearing box 7 is for vertical rolls...At a position away from the cylinder 18.19, the gap 29 becomes zero, and the bottom By providing the protrusion 23 that engages directly on the upper surface of the horizontal roll bearing box 9 so that the vertical roll bearing box is loaded, it is possible to engage the rolls all at once and reassemble them along the rail 13 during roll recombination. rolls can be moved quickly and easily.

Further, the engagement of each of the roll bearing boxes is automatically and reliably performed by the engagement recesses 17, 24, the engagement protrusion 23, and the stopper 11 for engagement positioning formed therein, and the rearrangement is possible. At times, the bodies of the upper and lower horizontal rolls 3 and 8 do not come into contact with each other and cause defects.

Further, a protrusion 23 is formed on the vertical roll bearing box 7,
Since the vertical rolls 22 are designed to engage with the lower horizontal roll bearing box 9 with a gap 29 when changing the rolls, the vertical rolls 22 can be changed without any trouble in the vertical direction.

Furthermore, the through holes 2F formed in the vertical roll bearing box 7 for engaging the upper and lower horizontal roll bearing boxes 2 and 9 are elongated in shape, so that the vertical rolls 22 are rolled in the longitudinal direction. There is no problem with position adjustment.

Similarly, in this embodiment, a protrusion 23 is provided on the lower surface of the vertical roll bearing box 7 for positioning the lower horizontal roll bearing box 9 and the vertical roll bearing box 7. In this case, an engagement hole for the protrusion may be provided on the vertical roll bearing box 7 side, or the through hole 21 may be used as an engagement hole.

In addition, if the upward stroke of the upper horizontal roll 3 is made sufficiently large so that the upper horizontal roll is above the tip of the engagement rod 10 at the time of rearrangement, only the vertical rolls 22 and 28 and the lower horizontal roll 8 can be used. This is effective when only the vertical roll needs to be replaced.

As mentioned above, in the present invention, the engaging rod that connects the upper and lower horizontal roll bearing boxes of the universal rolling mill via the vertical roll bearing box is placed on the vertically movable rearrangement rail. An engaging part for the lower horizontal roll bearing box is provided on the bottom surface of the vertical roll bearing box, so when changing the rolls, each horizontal roll and vertical roll can be engaged all at once for quick and easy automatic rolling. Machine availability can be significantly increased.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional universal rolling mill, Fig. 2 is an explanatory diagram showing a roll rearranging method of a conventional universal rolling mill,
FIG. 3 is a front view showing an embodiment of the universal rolling mill of the present invention in a rolling state, FIG. 4 is a side view of the embodiment in the rolling direction, and FIG. 5 is a view taken along the ■-■ arrow in FIG. FIG. 6 is a side view in the rolling direction showing the roll rearranging state of the embodiment shown in FIG. 4, and FIG. 7 is a view in the direction of the ■-■ arrow in FIG. 5. 1...Housing, 2...Upper horizontal roll bearing box, 3
...Upper horizontal roll, 7...Vertical roll bearing box, 8...
・Lower horizontal roll, 9...Lower horizontal roll bearing box, 10・
...Engaging rod, 11... Stop collar, 13... Rail, 17... Engagement recess, 21... Through hole, 22,2
8... Vertical roll, 23... Protrusion, 24... Engagement recess, 29, 40... Gap, 33... Corner cut portion.

Claims (1)

[Claims] 1.Equipped with an upper horizontal roll bearing box and a lower horizontal roll bearing box that respectively support a pair of upper and lower horizontal rolls, and each vertical roll bearing box that is located between the top and bottom of each of these bearing boxes and supports a pair of left and right vertical rolls, respectively. In the universal rolling mill, a rail for changing rolls is provided at the bottom of the housing of the horizontal roll bearing box so as to be movable up and down, and the upper horizontal roll bearing box and the lower horizontal roll bearing box are connected through the vertical roll bearing box. A retaining rod that can be coupled to the vertical roll is movably mounted on the rail, and the horizontal roll bearing box and the lower horizontal roll bearing box each have an engaging portion for the engaging rod, and the vertical roll The bearing box has an engaging portion on its lower surface for engaging with the corresponding upper surface of the lower horizontal roll bearing box, a through hole into which the engaging rod is loosely fitted, and corner portions are rounded. and the lower horizontal roll bearing box is in a position where it engages with the retaining portion of the vertical roll bearing box and creates a gap between the upper surface of the lower horizontal roll bearing box and the lower surface of the vertical roll bearing box. A universal rolling mill characterized in that the housing is provided with a stopper for stopping the rail.