JPS58209408A - Roll for rolling mill and rolling mill having shape controlling function - Google Patents

Abstract

PURPOSE:To enable the control of rolling to a desired plate shape from narrow to broad rolled plates by fitting a sleeve to the cylindrical end part of a roll and expanding or contracting the sleeve with the wedge effect corresponding to the depth of a tapered wedge. CONSTITUTION:A tapered sleeve 6 having the outside diameter slightly smaller than a cylindrical part 2 is wedged and fitted onto the tapered cylindrical roll end part 4 of a backup roll 1. The inside circumferential surface of the step on the right and left sides shown in the figure have gears 7, 7, which gear 8 is fitted and intermeshed with a gear 19 and is keyed 20 thereto. A single split nut 9 with a screw 11 is fitted and keyed 10 to the detaining groove 5 in the boundary part 18 between the end part 4 and a neck part 3 and a cylinder case 12 is fitted and screwed to the screw 11. A piston 14 is fitted into the cylinder chamber 13 in the case 12, and the chamber 13 is closed with a head cover 15, thereby constituting a cylinder 17. The gear 7' at the forward end of the piston 14 engages with the gear 7 with the half pitch turn thereof so that the sleeve 6 and the piston 14 can move integrally in the axial direction. The sleeve 6 is held energized to the right side by a spring 16. If the sleeve 6 is forced to the left side by supplying pressurized oil into the chamber 13, the sleeve 6 is expanded by the wedge effect of the taper of the end part 4.

Description

[Detailed description of the invention] Regarding a rolling mill equipped with rolls and having a shape control function,
Can you control the shape of the rolled plate by changing the profile of the hold-down roll (cross-sectional shape of ?i + ivy in the axial center j direction)? 1.

The four-high rolling mill shown in Fig. 1 is the most widely used at present, but the drawbacks of this four-high rolling mill are the rolling rolls (back roll a,
When a rolled plate d having a narrow width compared to the body length of the work roll b) is rolled, the work roll b is curved as shown by the two-dot chain line C in the figure, and the crown of the plate increases. Therefore, in order to prevent the plate crown from increasing, the work roll is suspended by applying a force in the separation direction to the shaft end of the work roll B. There is a problem in that the effect is reduced due to interference with the

Several improvements have been made to overcome these drawbacks, one of which is that a large chamfer C is installed at both ends of the backing roll a to separate the work roll b and the backing roll a, as shown in Figure 2.
There is also a method in which the rollers do not come into contact with each other at both ends of the roll. However, although this method is good for narrow plates, it has the disadvantage that when the width of the plate increases, both ends of the work roll b escape and the edges of the plate become thicker, resulting in a negative crown.

Figure 3 shows an improvement to compensate for this minus crown defect, and shows the position where chamfer C is formed (
The inside of the roll (both ends of the backing roll a) is made hollow f, and pressure oil is supplied to the hollow f, and the roll meat -N1 is expanded by the oil pressure of the hollow f to increase the flat M1 portion of the backing roll. It was made in a similar manner.

That is, when rolling a narrow width, roll in the state shown in Fig. 3 without supplying pressure oil to the hollow f, and when rolling a wide width, roll in the state shown in Fig. 4 with pressure oil supplied to the hollow f. It is something.

However, when the profile change of the hold-up roll is carried out using pressure oil, the state in which the pressure oil is supplied does not have the shape shown in Fig. 4; instead, the hold-down roll has a concave shape at the part where it contacts the work roll, and has a so-called apple shape. Therefore, it is virtually impossible to control the shape of the If rolled sheet.

In view of the current situation, it is an object of the present invention to enable the profile change to be turned off while maintaining the rigid body state of the backing roll, and to control the desired shape of a rolled plate from a narrow width rolled plate to a wide width rolled plate. It is something.

The present invention will be described in detail below with reference to the drawings.

First, referring to FIG. 5, the backing roll 1 of the present invention will be explained.

A roll shaft end @4 having a diameter smaller than that of the roll body 2 and tapered at a predetermined angle is formed between the roll body 2 and the roll neck part 3, and the boundary 18 between the neck part 3 and the shaft end 4 is provided with a medium-high heat. A groove 5 is carved in the groove.

1i11 The shaft end portion 4 has a smaller outer diameter than the body portion 2.
A tapered sleeve 6 that can be engaged with the shaft end 4 is fitted onto the shaft end 4.

The inner IW edge on the neck side of the tapered sleeve 6 has a two-stage shape, with engaging teeth 7 at 0 pitch on the inner peripheral surface of the 1111th stage of the neck, and internal teeth 8 on the 1111th stage of the body. 11 stamps are carved around the entire circumference.

+iiJ Fit the gear 19 into the boundary part 18 and slidably fit the internal teeth 8, and the boundary part 18 and the gear 1
A key 20 is buried between the spaces 9 and 9 to prevent the gear 19 from rotating. A split nut 9 with a thread 11 carved on the outer circumferential surface is fitted into the locking groove 5, and a key 10 is inserted between the locking skin 5 and the nut 9.
is embedded to restrain the rotation of the nut 9 with respect to the 1st support roll 1 which is the same as the gear 19, and the cylinder case 12 is embedded in the nut 9.
is hinged in a state where it is fitted with the boundary part 18. The cylinder case 12 is ring-shaped, and an annular cylinder chamber 13 is bored in the cylinder case 12. An annular piston 14 is slidably fitted into the oil-tight 11, and the cylinder chamber 13 is closed with a head cover 15 to form a cylinder. 17.

The tip of the piston 14 is provided with engaging teeth i that can pass between the engaging teeth 17 at the same pitch as the engaging teeth 7 carved on the taper sleeve 6, and pass through the engaging teeth 7'. If the taper sleeve 6 and the piston 14 are rotated by half a pitch in the same state, the taper sleeve 6 and the piston 14 cannot be separated, and the taper sleeve 6 and the piston 14 can move together in the axial direction.

The tapered sleeve 6 has a width of 1 and is biased by a spring 16 toward the neck portion 3 so that pressure oil can be supplied to the neck portion 3 side of the cylinder chamber 13.

Next, 1. The operation of changing the profile of the backup roll 1 described above will be explained.

If the cylinder 17 is in a free state and no force is applied to the tapered sleeve 6 in the axial direction, the tapered sleeve 6 is simply fitted onto the shaft end t114, and since the tapered sleeve 6 has a smaller diameter than the body 2, the pressure is reduced. Only the trunk 2 can transmit the tonneau J.

Next, pressure oil is supplied to the cylinder 17, and Qi is moved to the sleeve 6t.
- When pushed toward the trunk side, the Q-pass +7-bu 6 expands due to the taper effect of the shaft 4 portion 4.

By appropriately adjusting the pushing force of the cylinder 17, the outer diameter of the tapered sleeve 6 can be made equal to the outer diameter of the body 2, and can be made larger than the outer diameter of the body.

Here, talking about the legal control of the taper sleeve 6, when applying a predetermined pushing force to the taper sleeve 6 and rubbing the taper sleeve 6 onto the torso 2 and the body, the dimensions of the taper sleeve 6 Management is easy, and since the tapered sleeve 6 is prevented from rotating relative to the backing roll 1, it is practical even if the concentricity of the shaft end 4 and the 1) part 5 is not exact.

If the taper sleeve 6 is polished as shown below, 1111
If the pushing force is less than a predetermined pushing force, the outer diameter of the Taber sleeve 6 will be smaller than that of the chest, and if the pushing force is less than 1, the outer diameter of the Taber sleeve 6 will be larger than that of the torso.

In addition, in the case of (2) the backing roll, the inner diameter of the sleeve and the inner diameter of the shaft end were respectively tapered, and a direct wedge effect was created by the engagement of the two, but as shown in Fig. 6, the sleeve 25 was
The shaft end 26 is made into a cylinder, and the wedge units 27 and 27 are sandwiched between them, and the model unit 27 is made into a cylinder.
, 27', and the wedge rings 28, 28' are slid in the axial direction through the externally applied wedge rings 29, zci. The sleeve 25 may be expanded and contracted.

Next, referring to FIG. 7, a four-stage LTE rolling method equipped with the above-mentioned backing rolls will be explained.

7 is made by changing the lengths of the tapered sleeves 6 and d of the backing roll 1 and the ζ backing roll 1' to diversify the shape control ability of the rolling mill.

In the figure, 21 and 21' are upper working rolls, 22 is a honey-rolled sheet, 23 is a rolling force, and 24 is a benzo-inguts J.

When rolling a narrow rolled plate 22, the cylinder 17 is left in a free state, and the Taber sleeve 6, d is rolled with a diameter smaller than the outer diameter of the cylinder. If this is done, the pending force 24 will effectively act on the work rolls 21, 21 since the part A as shown in FIG. 1 will not interfere.

When rolling a rolled plate 22 with a width of 1 mm, the cylinder 17 is driven and a predetermined pushing force is applied to the Taber sleeve 6.6 to expand the Taber sleeve 6.6'.
, d are made the same diameter as the body, the body will be extended by 6.6 minutes of the Taber sleeve, and the small minus crown shown in FIG. 2 will not occur.

Note that the shape control by the Taber sleeve 6.6' is not limited to the above example, and the Taber sleeve 6.6' can be controlled depending on the plate shape.
By appropriately controlling the pushing force of 6' and changing the diameter of the taper sleeve, it is possible to control the shape over a wider range. That is, changing the diameter of both ends of the backing rolls 1, 1' means that the profile of the backing roll 1.1' is transferred to the work roll 21°21', and the work roll 21, 2
The same effect as that obtained by controlling 1 with benzo ink can be obtained.

Therefore, the shape control capability is DI capability with only the backing rolls 1 and 1', and if the bending control of the work rolls is added, the shape control capability is significantly increased.

Historically, in the example shown in Figure 7, the lengths of the Taber sleeves 6 and 6' are different, so the bending curve of the lower work rolls 21 and 21 can be changed, making it possible to further diversify the shape control. .

Incidentally, although the above embodiments have been described with reference to the backing roll, it goes without saying that the roll having the above structure may be installed as an intermediate roll of a multi-stage rolling mill.

As described above, according to the present invention, (i) the length of the roll used for assembly transmission can be easily changed, (i) the diameter of both ends of the roll can be changed, and the profile of the roll can be changed. can be changed (b)
Since both roll stags transmit load through metal contact, changes in the roll profile can be directly transmitted to the work roll and intermediate roll. Therefore, in a rolling mill equipped with such rolls, Gv)
Rolled plates with various widths can be rolled without changing the work rolls, greatly increasing the operating rate of the iE rolling mill. (ν) The shape control effect of work roll bending can be achieved regardless of the width of the rolled plate. (Vil) It is possible to control the shape using only the backing roll, etc., and if you add work roll bending, the shape control ability can be dramatically increased.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic explanatory diagrams of the conventional JfE rolling mill, and Figure 3
4 is an explanatory diagram of a conventional example of a roll whose profile is changed, FIG. 5 is a partial diagram of a roll according to the present invention, and FIG.
The figure is a partial view showing another embodiment of the roll according to the present invention, and FIG. 7 is a schematic diagram of a rolling mill according to the present invention equipped with the roll. ■, 1 is the back roll, 4, 26 is the roll shaft end, 6.6
indicates a Taber sleeve, and 25 and 2g indicate a sleeve. Patent application: Ishikawajima-Harima Heavy Industries Co., Ltd. Continued Amendment: July 7, 1981, 118-1157 Patent: 1 Inc. No. 90833, 2
Name of the invention Roll for IL rolling mill and rolling mill 3 with shape control function Patent applicant Otemachi, Chiyo 11-ku, Tokyo - November 12-1 (009)
4th Director, Ishikawajima-Harima Juogyo Co., Ltd. Yahagi Daini Building, 3-5-3 Uchikanda, Chiyoda-ku, Tokyo As shown in the scope of claims section of the specification and the detailed explanation of the invention. (11) Sleeve +l (4th column of detailed explanation of the invention in the specification)
Tei No. 7 <■ (2 places), No. 9 ■, line 10, No. 6
Sada 3rd row, 7th row, younger brother l8fI - 191st block. Page 7, lines 5-6, 8? Correct the 1st shaft end in I { 1 to the 1st axis end''. Supplement No. 11 to the brief description column of the drawings in the IIID specification
The 1st shaft end I in the Sada No. 3 R work is referred to as the 1st shaft end. 7 Attachment A/1 List of documents (1) Document recording the scope of claims after sleeve IE
III Claim 1) Roll! ! ! 11 - A roll for rolling plate, characterized in that it has a ladder configuration in which a sleeve is fitted to one end and the sleeve expands and contracts by a wedge action according to the engagement depth of the tapered shape. 2) A sleeve is fitted into the recessed portion of at least one roll El other than the work roll, and the sleeve is configured to expand and converge using a wedge n corresponding to the engagement depth of the tapered shape. A rolling mill with shape control function.

Claims (1)

[Claims] l) Jf characterized in that a sleeve is fitted to the end of the roll shaft, and the sleeve is expanded and contracted by imitation according to the engagement depth of the tapered shape. Roll for u machine. 2) A shape characterized in that a sleeve is fitted to the shaft end of at least one roll other than the work roll, and the bending sleeve is expanded and accommodated by imitation according to the engagement depth of the tapered shape. Rolling mill with control function.