JPH04178216A - Method for changing size of straightening roll on roll straightening machine for shape steel - Google Patents

Abstract

PURPOSE:To easily and rapidly change the size of roll by holding the straightening roll unit as it is in the lateral posture on the assembling stand, moving the straightening roll to the axial direction by using the roll moving jig and adjusting the interval of the rolls by increasing or decreasing the number of the distance rings. CONSTITUTION:A shaft nut 4b of the main shaft 4 of the roll straightening machine is made loose and a straightening roll unit 3A being fixed is pulled out from this main shaft 4. As it is in the lateral posture, it is fit in an inserting shaft 14 and fixed with a presser nut 15. A nut 3e of the straightening roll unit 3A is made loose, a roll moving jig 20 is put in between straightening rolls 3b1, 3b2, a rod 22a is forwarded to this straightening roll 3b1 by pressing the back side to this straightening roll 3b2, this rod 22a is projected by operating a switching valve 24, and the straightening roll 3b1 is moved to the axial direction. The number of distance rings 3g is increased or decreased so that the interval between the straightening rolls 3b1, 3b2 is made to the dimension of design. The same as the above, the moving jig 20 is put between the rolls 3b2 and 3b3, and the interval is adjusted. At final, the nut 3e is tightened and set.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to: ■ Changing the size of straightening rolls used in roll straightening machines that correct warps and bends in shaped steel such as shaped steel, L-shaped steel, and steel sheet piles. Regarding the method.

<Prior Art> -a. A leveler straightening machine is used to correct warped or curved shapes of shaped steel such as H-shaped steel, L-shaped steel, and steel sheet piles. There are two main types of leveler straightening machines: a roller straightening machine and a press straightening machine, and the roller straightening machine is most often adopted because it has higher efficiency than the press straightening machine.

Roller straightening machines have a cantilevered type and a double-sided type for mounting the straightening rollers depending on the structure, but the cantilevered type is often adopted because it is easy to rearrange and adjust the rollers. This is an example of a roller straightening machine, in which a straightening roll unit 3 is fitted to a main shaft 4 in the vertical direction of a pass line PL that conveys a shaped steel 2, and a plurality of, for example, 3 to 5 rolls They are arranged in a staggered pattern.

As shown in FIG. 7, in this straightening roll unit 3, a sleeve 3a with a collar at one end is first fitted onto the main shaft 4 and prevented from rotating by a key 48, and a plurality of straightening rolls 3b are arranged on the outside of this sleeve 3a. and spacer 3 for adjusting the interval to match the size of the H-beam 2 to be straightened.
c is installed between the straightening rolls 3b. The correction roll 3b and the spacer 3c are coupled by a key 3d so that the rotation of the sleeve 3a is transmitted.
It is fixed by a sleeve nut 3e.

Further, one end of the sleeve 3a is fixed to the main shaft 4 by a shaft nut 4b.

In the straightening roll unit 3 used in such a roller straightening machine, the rolls are rearranged in advance according to the shape and dimensions of the product and the degree of bending before straightening. The direction is adjusted and the reduction amount is set.

As shown in Fig. 8, the method for changing the roll size is to attach the straightening roll unit 3 vertically to a cylindrical guide 5b whose one end is fixed to the base plate 5a, and then tighten the sleeve nut 3e. After loosening and removing the straightening roll 3b and spacer 3C, they are replaced with a straightening roll 3b and spacer 3c of a different size required for the next straightening. Naturally, this work of changing the roll size requires heavy transport equipment such as an overhead crane or a gate type crane.

<11 Problems to be Solved by the Invention> However, the above-mentioned conventional correction roll size changing operation has the following problems.

That is, (1) After the straightening roll unit 3 is removed from the roll straightening machine 1, it is necessary to reverse it to 90'' in order to attach it to the guide 5b.

- When changing the size, it is necessary to pull out all the straightening rolls 3b and spacers 3C from the sleeve 3a, and then stringing in the straightening rolls 3b and spacers 3C of different sizes one by one.

1. The work is extremely troublesome and inefficient. This will require a lot of work time.

An object of the present invention is to provide a method for changing the size of a straightening roll used in a roll straightening machine for shaped steel, which solves the above problems.

<Ri! 1> The structure of the present invention is as shown in FIG. The replacement method includes the step of removing a straightening roll unit consisting of a plurality of 'It positive zero-rules and 1M number of disk ring spacers attached to a sleeve with a collar at one end from the main shaft of the roll straightening machine. , a step of mounting the straightening roll unit on a roll assembly table while keeping it in a horizontal position, and moving the straightening roll in the axial direction using a roll moving jig, and then increasing or decreasing the number of distance rings of the spacer. a step of individually adjusting the interval between the straightening rolls to a predetermined amount, and a step of fitting and fixing the adjusted straightening roll unit to the main shaft of the roll straightening machine while keeping the horizontal orientation; This is a method for changing the size of a straightening roll used in a roll straightening machine for shaped steel, characterized in that:

<Saku Kawa> According to the present invention, the straightening roll unit is held horizontally on the roll assembly table, and the straightening roll is moved in the axial direction using a roll moving jig to increase or decrease the number of distance rings. Since the spacing between the straightening rolls is adjusted by doing this, it is possible to easily and quickly change the size of the rolls without having to individually disassemble the straightening rolls and spacers from the sleeve as in the conventional case. .

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

First, the straightening roll unit 3A used in the present invention is
As shown in FIG. 2, a plurality of straightening rolls 3b+, 3bz, 3bz are provided with notches 3f.

3b, and a spacer 3c' consisting of a plurality of disk rings 3g having a predetermined thickness t are fitted into a sleeve 3a with a collar at one end.

The disc ring 3g, which is the spacer 3c', is
In detail, as shown in FIG. 3(a), it has a semicircular shape so that it can be set into the sleeve 3a from the outside, and as shown in detail in FIG. 3(b), it has a semicircular shape in the center. is provided with a step 3h having a depth d, and is designed to prevent it from engaging with the notch 3r of each straightening roll 3b and being pulled out to the outside.

The material of this discun ring 3g may be aluminum or plastic if the aim is to reduce the weight, but -C is made of S
It is sufficient to use a steel material such as S41, and if the thickness L is made too thin, the depth d of the stepped 3h to prevent removal will not be sufficient and the installation will become unstable. A minimum value of about 5 to 81IIl is required, and the value of the depth d of the stepped 3h is preferably 2 to 4 m.

In addition, FIG. 3(C) shows a spacer 3c' having a different shape, in which a female threaded ring 3m having a predetermined width and a threaded ring 3n are paired, and a rotational spacer provided on the outer surface of the female threaded ring 3m is used. By inserting a turning rod (not shown) into the hole 3p and turning the female threaded ring 3n, adjust the overlap (meshing) ffil of the threaded part with the male threaded ring 3m.
It is possible to adjust the interval between the straightening rolls 3b in small units of one loaf or less. However, the minimum distance that can be set is regulated by the size of the radius W between the female screw ring 3m and the male screw ring 3n, so the value of the radius W must be at least 20 to 30@m. Note that the material thereof may be steel, similar to the material of the disc ring 3g.

In addition, the spacer 3c of the above discun ring 3g
' and screw ring 3m, 3n spacer 3C# may be used alone, but if you use them in appropriate combination, it is possible to make a wide range of adjustments in 1m increments over the width dimension W of the screw ring. It is.

Next, the roll assembly stand 10 will be explained with reference to FIG.
One end is supported in a cantilevered manner. A nut 15 is provided on the opposite end of the charging shaft 14 from the bearing side, and a handle 16 is provided on the bearing side for adjusting the rotational angle of the straightening roll unit 3A.

These materials include SS41 and 835, which are easy to obtain.
A welded structure using steel such as C is inexpensive. In addition, the shaft dimension of the charging shaft 14 should be a size that is safe in terms of strength even when the straightening roll unit 3A is set, and the outer diameter dimension should be 55 mm smaller than the inner diameter of the straightening roll unit 3A.
It's easier to set up if you make it smaller by about ~10 kaku.

Further, using FIG. 5, the roll moving jig 20 of the present invention
To explain the structure, three jack cylinders 22 are provided with rods protruding in a direction perpendicular to the surface of a frame 21 whose inner surface is approximately semicircular. Air pressure is supplied from an air source device (not shown) via t24. The material of the flasks 1 and 21 is, for example, steel such as S541 (Although A may be used, but if aluminum is used, it will be lighter in handling.
The number of pieces may be 2, but the stroke should not be too large, and the installation size will be large, so it should be 20 to 50 m.
It is desirable to select from the range of .

The procedure for changing the roll size will be explained below.

■ After loosening the shaft 7b of the main shaft 4 of the roll correction Ill, remove the correction roll unit 3A fixed to the main shaft 4.
is extracted from the main shaft 4 using a crane or the like.

(2) Fit the extracted straightening roll unit 38 horizontally onto the charging shaft 14 of the roll assembly 10 and fix it with the presser knurls 5.

■ After loosening the nut 3c of the straightening roll unit 3Δ, move the roll moving jig 20 to the straightening roll 3b.

and 3b, put its back against the straightening roll 3b2, direct the rod 22a toward the straightening roll 3b+, and then open the switching valve 2.
4 to protrude the rod 22a,
The straightening roll 31++ is moved in the axial direction.

(2) While taking out the roll moving jig 20, increase or decrease the number of distance rings 3g so that the distance between the straightening rolls 3b and 3bt is the set dimension.

■ Next, move the roll moving jig 20 to the straightening rolls 3bz and 3b.
2 and in the same manner, straightening rolls 3b and 3b
Adjust the distance between z and UA.

■ Finally, after adjusting the distance between the straightening rolls 3bs and 3b, tighten the nut 3e to tighten the straightening roll 3b.
+ will be moved and all roll intervals will be set. In addition, if it is not completely tightened, please
By using the small moving jig 20, each roll can be moved.

(2) The straightening roll unit 38 whose spacing has been adjusted is fitted onto the main shaft 4 of the roll straightening 1Ii1 using a crane or the like, and the shaft 4b is tightened to fix it to the main shaft 4.

<Effects of the Invention> As explained above, according to the present invention, the straightening roll unit is held horizontally on the roll assembly table, and the straightening roll is moved in the axial direction using a roll moving jig. By increasing or decreasing the number of distance rings, the spacing between the straightening rolls can be adjusted.
It is possible to shorten the time required to change the size of the straightening roll, and it is also possible to reduce the number of personnel required to change the size of the roll.

[Brief explanation of the drawing]

Fig. 1 is a flow diagram showing the procedure for changing the roll size of the present invention, Fig. 2 is a side sectional view without showing the straightening roll unit used in the present invention, and Figs. 3 (a) to (C) are explanatory diagrams of the spacer. ,
Fig. 4 is a side view of the roll assembly device, Fig. 5 is a front view (a) showing a roll moving jig, (b) a side view, and Fig. 6 is a side view showing the configuration of a conventional roll straightening machine. FIG. 7 is a side sectional view showing a conventional correction roll unit, and FIG. 8 is a side sectional view illustrating a conventional roll size change. ■...Roller straightening machine, 2...Shaped steel. 3A...Correcting roll unit. 3a...Sleeve. 3 b 3 bs, 3 bs, 3 b,
...Correcting roll. 3c', 3c'...spacer. 3g...distance ring. 4...Main shaft, 10...Roll assembly table. 14...Charging shaft, 20...Roll moving jig. 21...Frame, 22...Jet cylinder. Patent applicant: Kawasaki Steel Corporation Figure 1 Drug 3 Figure (a) (b) (C) Figure 4 Figure 5 Figure 61XI Happy Figure 7

Claims (1)

[Claims] A method for changing the size of a straightening roll used in a roll straightening machine for straightening warps and bends in shaped steel, comprising: a plurality of straightening rolls mounted on a sleeve with a collar at one end from the main shaft of the roll straightening machine; a step of removing a straightening roll unit consisting of a straightening roll and spacers of a plurality of distance rings; a step of mounting the straightening roll unit on a roll assembly table while keeping it in a horizontal position; and a step of removing the straightening roll using a roll moving jig. axially moving the spacer, and then increasing or decreasing the number of distance rings of the spacer to individually adjust the distance between the straightening rolls to a predetermined value, and placing the adjusted straightening roll unit in a horizontal position. A method for changing the size of a straightening roll used in a roll straightening machine for shaped steel, comprising the steps of: fitting and fixing the main shaft of the roll straightening machine as is;