JPS5841122B2 - Atsuenki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides billet,
It relates to a rolling mill that rolls shaped steel, rods and wire rods, etc.

Conventionally, in this type of rolling mill, as shown in FIGS. 1 and 2, rolls 1 and 2 provided with calibers are pivotally supported in roll housings 4 and 5 via bearings 3. A spindle 6.7 was connected and rotatably driven.

In addition, the roll gap is adjusted by the rolling down devices 8, 8 provided in the roll housings 4, 5 while detecting the amount of rolling down with a rolling indicator 8A. The entire rolling mill was moved in the axial direction of rolls 1 and 2 along line 9A, and each caliber and rolling line were adjusted coaxially to accommodate changes in the specifications of the rolled material.

In such conventional rolling mills, the spans of the rolls 1 and 2 supported by the roll housings 4 and 5 are long, which causes a large amount of deflection of the rolls, weakening the rigidity of the rolling mill and complicating the control of the rolling operation. .

Furthermore, since the entire rolling mill was moved along the sole plate, the work was laborious and the sole plate itself was large.

SUMMARY OF THE INVENTION In view of these conventional drawbacks, it is an object of the present invention to provide a rolling mill in which roll deflection is minimized.

The rolling mill according to the present invention provides backup rolls shorter than the rolling rolls to back up the rolling rolls, and moves the rolling rolls in the axial direction to match each caliber with the rolling line to meet various specifications of rolled materials. It is something to do.

That is, the rolling mill according to the present invention includes a roll housing;
a roll that is rotatably supported by the roll housing and extends to the outside of the roll housing, and has a plurality of calibers provided on its outer periphery; 1
a backup roll having an axial length shorter than that of the rolling roll, which is located over an area of two calibers; It is configured to include a moving device that moves the rolling rolls in the axial direction.

Embodiments of a rolling mill according to the present invention will be described below with reference to the drawings.

3 to 5 show a first embodiment of the present invention, in which a rolling mill 10 has a roll housing 20° and a rolling roll 3.
0.31, backup roll 40°41, moving device 5
0.

The roll housing 20 is composed of a pair of vertical columns 20A and 20B facing each other, and their bases are both fixed onto a sole plate 12 fixed to the rolling mill installation surface 11.

The center portions of the columns 20A and 20B coincide with a rolling line (not shown).

Housing arms 2 extend horizontally away from each other from the vertical center of the columns 20A and 20B.
1, 22, 21A.

22A is protruded, and this housing arm 21 and 21A
And 22 and 22A are coaxial.

Also, these housing arms 21 and 22 and 21A and 2
2A are provided facing each other, and the housing arms 2
An upper roll bearing 23 and a lower roll bearing 24 are slidably sandwiched between 1 and 22 (FIG. 4).

A balance ram 25 is attached to the lower part of the upper roll bearing 23, and the tip of the balance ram 25 is brought into contact with a stepped portion provided at the opposing portion of the housing arms 21 and 22, thereby moving the upper roll bearing 23 in the vertical direction. It is designed to balance the

The arms 21A and 22A on the opposite side are also provided with parts similar to these, and are shown with the suffix A in the drawings and have similar functions.

Vertical column 20A of the roll housing 20.

An opening for passing the rolls is formed in the middle part of 20B at right angles to the rolling line, and a rolling roll 30.31 is inserted into this opening, and both ends thereof are connected to the roll bearings 23° 23A, 24.2.
Supported by 4A.

Also the housing arm 21A of this roll 30.31.

Spindles 14, 14 are connected to the end on the 22A side via roll couplings 13, 13, respectively, and rolls 30, 31 are rotationally driven by driving the spindles 14, 14.

As shown in FIG. 4, the housing arm 2L22 has horizontally longitudinal openings 26 and 27 formed at the top and bottom, respectively, and from these openings 26 and 27, the brackets 2B of the upper and lower roll bearings 23 and 24 are opened. , 29 are protruded, and concave screws are formed at the tips of the brackets 28 and 29, respectively, parallel to the roll.

The moving device 50 is a screw 51.51.52°52
and the handle attached to its tip 53°53.5
4 and 54.

The screws 51, 52 are respectively supported on housing arms 21, 22 in parallel with the rolling rolls 30, 31.
Brackets t-28, 2 of the upper and lower roll bearings 23 and 24
It is screwed together with a concave screw provided at 9.

Thereby, by turning the handle 53, the upper roll bearing 23 and the roll 30 can be moved in the axial direction, and by the handle 54, the lower roll bearing 24 and the roll 31 can be moved in the axial direction.

On the other hand, the upper roll bearing 23A and the lower roll bearing 24A are slidable in the axial direction of the roll 3.0° 31 on the housing arms 21A and 22A, and no moving device is attached thereto.

The backup roll 40 is disposed above the roll 30, and the backup roll 41 is disposed below the roll 31 in contact with the rolls.
B is supported by bearings 42 and 43 and cannot be moved in the axial direction.

The length of the backup rolls 40, 41 in the axial direction of the roll portions is slightly longer than one of the calibers provided on the rolls 30, 31.

Also, the backup roll 40 has a roll housing 20.
It is balanced by a hollow balance cylinder 44 installed at the top of the vertical columns 20A and 20B, and receives the rolling blades of the rolling devices 45 and 46 attached to the upper ends of the vertical columns 20A and 20B, respectively, and transmits the rolling blades to the rolls 30 and the gaps between the rolls 30 and 31. is now being adjusted.

To explain the operation of the first embodiment, each handle 53,54 is turned to move the mill rolls 30,31 in the axial direction to match the required caliber with the rolling line.

Thereafter, the rolling down device 45 is driven to adjust the gap between the rolls 30.31, and the spindle 14 is driven to adjust the gap between the rolls 30.31.
31 is rotated to perform the rolling operation.

In this way, in rolling operations, there is no need to move the rolling mill itself in order to align the caliber with the rolling line, as in the past, so the large drive device and related parts can be omitted or miniaturized, and the operation is easy. Become.

Next, in a second embodiment shown in FIGS. 6 and 7, the present invention is applied to a vertical rolling mill 60.

In this embodiment, rolling rolls 30 and 31 and backup rolls 40 and 41 having the same shape as in the first embodiment are provided, and each has the same function, and the rolling rolls 30 and 31 are movable in the axial direction. has been done.

However, in this second embodiment, the rolling roll 30.31
, the axes of the backup rolls 40 and 41 are vertical.

Further, the screw 61 is vertically supported by the outer housing 62 and is screwed into bearings 23 and 24 of the rolls 30 and 31.

By transmitting the driving force of the electric motor 64 to the screw 61 via the speed reducer 63, the bearings 23, 24 and the rolling rolls 30, 31, which are screwed into the screw 61, are movable in the axial direction.

In this second embodiment, the inner stand 65 provided inside the outer housing 62 only pivotally supports the backup rolls 40, 41, and supports the rolling rolls in the vertical direction like a conventional vertical rolling mill. There is no need to move to

Therefore, the inner stand 65 can be fixed to the sole plate, and there is no need for a device for sliding the inner stand 65 in the outer housing 62, and the outer housing 62 has a structure as a frame that supports the rolling roll drive device 66 in the upper part. It is sufficient if only

As described above, the rolling mill according to the present invention includes a roll housing, a roll that is rotatably supported by the roll housing, extends to the outside of the roll housing, and has a plurality of calibers on the outer periphery thereof. a backup roll rotatably supported by the roll housing and having a shorter axial length than the roll, the roll being located over the area of one caliber provided on the roll; The rolling mill is equipped with a moving device that moves the rolling rolls in the axial direction so that the caliber used for rolling can be changed among the multiple calibers used for rolling.
Separately from the device that adjusts the rolls, the upper and lower rolls are moved in the same direction (large stroke), and the rolling rolls are moved widely so that the caliber that matches the various specifications of the rolled material can be selected from among the multiple calibers provided on the rolling rolls. However, even if the caliber used can be changed, the rolling line can be made the same without changing its position, and this can sufficiently meet the requirement of making the rolling line the same, which is required when rolling is performed in combination with a vertical rolling mill, for example. can.

In addition, by arranging a backup roll with a body length that covers only one caliber for the length of the caliber roll, the space between the housings can be made extremely narrow, thereby reducing roll deflection. This makes it possible to realize a highly rigid rolling mill that does not apply prestress.

In particular, the amount of deflection of the rolling rolls is 3 times the distance between the roll housings.
Since it is proportional to the multiplication factor, this effect is large, and with the addition of reinforcement by backup rolls, the rigidity of the rolling mill is significantly improved.

[Brief explanation of the drawing]

Figures 1 and 2 are front and side views of a conventional rolling mill;
3 is a front view of the rolling mill according to the present invention, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is a sectional view taken along the line ■-■ in FIG. 7 is a front view and a side view showing another embodiment of the present invention. Explanation of symbols, 10: Rolling machine, 20: Roll housing,
30, 31: Rolling roll, 40, 41: Backup roll, 50: Moving device, 51, 52° 61 Niscrew, 53. 54: Handle, 60: Vertical rolling mill,
63: Reducer, 64: Electric motor.

Claims (1)

[Claims] 1 a roll housing, a rolling roll rotatably supported by the roll housing and extending to the outside of the roll housing, and provided with a plurality of calibers on its outer periphery; a roll rotatably supported by the roll housing; a backup roll having a shorter axial length than the rolling roll and located over the area of one caliber provided on the rolling roll; and a caliber serving for rolling among the plurality of calibers provided on the rolling roll. A rolling mill comprising a moving device that moves the rolling rolls in the axial direction so that the rolling rolls can be changed.