JPS6082209A - Variable width type horizontal roll - Google Patents

Abstract

PURPOSE:To change freely and quickly roll width by remote operation with a horizontal roll having an arbor and a pair of sleeve rolls by sliding the sleeve rolls on the outside circumferential surface of the arbor by fluid pressure. CONSTITUTION:A horizontal roll body is constituted of an arbor 5 and a pair of sleeve rolls 3, 3' fitted onto the outside circumferencial surface of said arbor. Oil injection grooves 6 are provided to the arbor 5. Oil pressure is exerted from a hydraulic device 8 via an oil piping A to the grooves 6 to decrease the coefft. of friction thereby making the rolls 3, 3' slidable. The oil pressure is then actuated from a hydraulic device 9 via an oil piping B and the roll width is detected by detectors 11, 11'. The roll width WR is adjusted to a prescribed space. The devices 8, 9 are controlled by a hydraulic control unit. The H-beams of various sizes are thus produced with high dimensional accuracy of height.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to horizontal rolls, and more particularly, to the production of H-section steel with a constant web height even with different flange thicknesses by means of a universal rolling mill. The present invention relates to a variable width horizontal roll suitable for use when

Normally, when rolling H-section steel using a universal rolling mill, as shown in FIG. 1, a pair of horizontal rolls 1 and a pair of vertical rolls 2 are used, and a gap a between them is used.

By adjusting a′, different web thickness summer (
-W and flange thickness f in several product sizes. The designation of each dimension of the product shall be as shown in Figure 2.

In this way, the product size group that is rolled using horizontal rolls and vertical rolls is generally referred to as "Series IX", and the dimensions of the flange leg length within the web are between the product sizes within one series. An equal rolling configuration is adopted.

As a result, the web height H of C within the same product series is constant, so the web height H will vary greatly, especially between different sizes of flanges J9E and f. Strictly speaking, the ramp thickness f also varies, and therefore the web height H varies.

On the other hand, depending on the use of H-beam steel, the same web height H is increasingly required for product sizes with different flange thicknesses f within the same product series. There is.

It is clear that this requirement cannot be met by the conventional H-section steel manufacturing method described above.

In order to overcome these drawbacks and meet these demands, there is a type of horizontal roll in which the width of the roll is variable. An example thereof is shown in FIG. This horizontal roll.

, two sleeve rolls 8 are slidably fitted into the radius 5, a spacer 4 is inserted between both sleeve rolls to adjust the distance between them, and each sleeve roll 8 is fitted into the radius 5 by a fixing jig 8. This is a fixed #f horizontal roll with variable width roll, but because the finishing universal rolling mill requires one pass and the amount of rolling is small, the spacer 4 has to be replaced at every rolling opportunity. It is used in a fixed manner.

Therefore, using the horizontal roll width variable roll,
When rolling a product size H-section steel with a constant web height between each rolling chance, there are advantages in reducing roll recutting and roll ownership, but conversely, the flange thickness is If different product sizes f are to be rolled successively, it is necessary to adjust the spacer thickness between the sleeve rolls in order to make the web height H the same dimension, and therefore the rolls are taken offline and It had the disadvantage that it required a lot of time and effort, such as making adjustments and chaperoning.

As a result of intensive research, the present inventors have developed a horizontal roll that completely eliminates the drawbacks of the above-mentioned conventional technology and allows the roll width to be changed online and by remote control.
The present invention was recently completed based on a novel idea, and its gist is that the radius and its outer peripheral surface K1
In the horizontal roll having a pair of mated sleeve rolls, at least one sleeve roll of the pair of sleeve rolls is configured to be slidable, and each sleeve roll is arranged between the pair of sleeve rolls in its axial direction. The sleeve roll is made to slide by providing a fluid pressure device on the outside that makes it possible to suppress it and a fluid pressure device that uniformly pressurizes the inside of the sleeve +ij in the radial direction to make the sleeve roll slidable. A variable width horizontal roll, characterized in that the width of the roll is changed by changing the width of the roll.

Hereinafter, the present invention will be explained in detail based on examples.

The embodiment is an example of a uniform horizontal roll device in which each of a pair of sleeve rolls is slidable on a radius, a hydraulic cylinder is provided between each sleeve roll, and both use hydraulic pressure. Shown in Figure 4.

First, the horizontal roll body is made up of a radius 5 and a pair of sleeve rolls 8 which are fitted into it by a conventional method, that is, tightly fitted.
, 8'. Sleeve rolls 8, 8' and R b
By creating an interference fit between the sleeve roll and the sleeve roll, it is possible to prevent the sleeve roll from moving due to the rolling reaction force, but on the other hand, the sleeve roll cannot be moved or slid by an external force, so rolling is possible. Become.

Regarding this sleeve roll sliding, in this example,
As shown in Part 4, an oil injection tube 6 is provided in the arc 5, and this u is connected to the fj of the radius 5 at the fitting part with the sleeve roll 8' which should be slidable.
-III is open to the outside, and there is an oil supply path provided inside the arbor 5 to prevent hydraulic pressure from being supplied from the outside. , )ljj with a shape of 17z. Then, it is connected to the hydraulic system 8 via the oil supply m+oil pipe A arranged outside the Erol.

In such a configuration, the sleeve roll 8 is moved by an external force.
, 8', the hydraulic pressure is applied to the oil injection groove 6 via the oil piping, and R 5 is slid.
An oil film is formed on the interference fit between the sleeve rolls 8 and 8', that is, the contact area, and the coefficient of friction (μ) is reduced. - Reduced to 1/loo, sleeve roll 8,8
' can be slid.

As shown in FIG. 4, in this embodiment, as an external force applying means for sliding the sleeve rolls 8, 8', a hydraulic cylinder 7.
7' is provided. This hydraulic cylinder is operated by hydraulic pressure applied from outside the roll by a hydraulic device 9 via an oil line IIB through an oil supply path provided inside the arm 5.

Each sleeve roll 8 is controlled by a hydraulic cylinder 7.7'.
, 8' can be pressed outward in the axial direction.

That is, when adjusting the interval between the sleeve rolls 8, 8' and changing the roll width, the hydraulic cylinders 7 and 7' are used when applying an external force in the opening direction (outward in the axial direction), and vice versa. In the case of the direction C (inward in the axial direction), the vertical rolls 2 and 2' are tightened with their reduction screws (not shown) and the horizontal roll sides s and s' are pressed. Needless to say, during such alignment, it is necessary to keep the sleeve rolls 8, 8' in a slidable state as described above.

Next, the operation of changing the horizontal roll width in the above-mentioned example of the horizontal roll device will be explained using FIG. 4.

First, a predetermined hydraulic pressure is supplied by the hydraulic device 8 in order to make the sleeve roll 8.8' slidable. In addition,
IO is a control device that controls the hydraulic pressure of the hydraulic devices 8 and 9 and the timing of the hydraulic load.

Next, the vertical roll left and right gaps are set to be equal to the target horizontal roll width WR. However, if the horizontal roll sides s and s' are not yet in contact with the vertical roll 2゜2I, the hydraulic cylinder 7.7 for expanding the roll width
Hydraulic pressure is supplied by the hydraulic device 9 until the two come into contact with each other, the contact pressure related to the vertical roll is detected, and the control device 10 stops the hydraulic pressure supply by the hydraulic device 9.

The roll width WR at this time is measured by the roll width detector 11°11'.
The vertical roll left and right gap and the hydraulic cylinders 7 and 7' are used to adjust Q to set the desired roll width WR. Next, the control device 10 controls the hydraulic pressure for sliding the sleeve! #Instructs tRs to unload hydraulic pressure. Thus, the horizontal roll width is set to the target roll width WR,
The state is ready for rolling. When setting this horizontal roll C,
Instead of the vertical rolls, sleeve rolls 8. A hydraulic cylinder may be used to press B' inward.

The (&, vertical rolls z, 2' are set at a position where a constant web height can be maintained at a state r/, iS to which a rolling reaction force P is applied.Thus, the horizontal roll width, that is, the web of the rolled material Regardless of the height, the target flange thickness can be set independently of the web height, and H-shape rolling can be performed with the web height always constant.

In addition, in the embodiment, both sleeve rolls 8
, 8' are made slidable and hydraulic pressure is used. However, various embodiments are also possible, such as making only one sleeve roll movable or using fluid pressure other than hydraulic pressure. Needless to say, it is.

As is clear from the above description, according to the present invention, the drawbacks of the prior art described above can be completely eliminated, and the roll width can be changed freely and quickly online by remote control.

In addition, it is possible to effectively deal with changes in the web height of the input material, changes in the plastic properties of the rolled material, etc., and even after the sleeve roll side is modified, the roll width remains the same as before modification. It can also be easily adjusted.

Therefore, within the same product series, we can meet the demand for manufacturing H-beams with the same web height even for product sizes with different flange thicknesses. It can be manufactured with high dimensional accuracy.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram showing the rolling state of H-section steel by a universal rolling mill, Fig. 2 is a diagram explaining the product name of H-section steel, and Fig. 8 is a schematic diagram of a horizontal roll width variable device according to the prior art. FIG. 4 is a schematic explanatory diagram of a universal rolling mill equipped with a horizontal roll width variable device according to an embodiment of the present invention. l...Horizontal roll z, 2'...Vertical o -/l/
8.3'... Sleeve roll 4... Spacer 5.
...Arm 6...Oil injection groove 7.7'...Hydraulic cylinder 8,9...Hydraulic bag V
110... Hydraulic control numbers 11, 11'... Roll width detectors A, B... Hydraulic piping. Patent applicant: Kawasaki Steel Corporation

Claims (1)

[Scope of Claims] In a horizontal roll having an L arbor and a pair of sleeve rolls fitted to the outer peripheral surface thereof, at least one sleeve roll of the pair of sleeve rolls is configured to be slidable, and the sleeve roll of the pair of sleeve rolls is configured to be slidable. A fluid pressure device is provided between the sleeve rolls to suppress each sleeve roll outward in the axial direction, and the inner surface of the sleeve is uniformly pressurized in the radial direction, thereby making the sleeve rolls slidable. A variable width horizontal roll characterized by being configured to change the roll width by sliding the sleeve roll by providing a fluid pressure device. & The variable width horizontal roll according to claim 1, wherein the arbor is provided with a fluid injection groove that allows fluid to be supplied to the fitting part with the sleeve roll through the inside thereof.