JPH05328A - Width-variable roll type roller straightening device - Google Patents

Abstract

PURPOSE:To provide a roller straightening device which can change the width of a width-variable straightening roll without changing the roll easily and steplessly, reduce a roll-changing work, enlarge productivity and prevent equipment from increasing. CONSTITUTION:A cylindrical pressing cylinders 7 having inner and outer diameters equal to those of a spacer 2 are mounted on both sides of a movable work roll 4 so that this movable work roll 4 is held between both the cylinders 7. The stroke of these two pressing cylinders 7 is controlled to change by a controlling part 8, a movable work roll 4 is moved, an interval between the movable work roll 4 and the fixing work roll 5, that is the roll width of the width variable roll 6 is made so that it can be adjusted steplessly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening machine for use in a section steel production line for H-section steel or the like. It is about machines.

[0002]

2. Description of the Related Art Conventionally, as a roller straightening machine of this type,
A roll having a variable width roll for straightening as described below is generally known.

As shown in FIG. 7, a variable width roll 23 composed of fixed and movable work rolls 21 and 22 and spacers 24 arranged between the work rolls 21 and 22 are assembled in a sleeve 25, 25 is fixed to the main shaft 28 with a nut 26 (reference document, 92nd Rolling Theory Section Material by Kawasaki Steel Mizushima Works at the Japan Iron and Steel Institute Joint Study Group, Pressure 92-10).

Then, the variable width roll 23 is changed to a predetermined roll width W, that is, the fixed and movable work rolls 21,
The spacing of 22 is changed by appropriately changing the spacers 24 for holding the position of the movable work roll 22 to those having an appropriate axial length with respect to the main shaft 28.

As shown in FIG. 8, the fixed and movable work rolls 21 and 22 of the variable width roll 23 are separately attached, and both main shafts 28 and 28 supported by separate support frames 29 are connected shafts. The work rolls 21 and 22 are integrated by being connected by 30 (see JP-A-1-317622).

Then, the variable width roll 23 is changed to a predetermined roll width W, that is, the fixed and movable work rolls 21,
The spacing of 22 is changed by moving a support frame 29 supporting the spindle 28 of the movable work roll 22 on the base 31 in the axial direction of the spindle 28.

As shown in FIG. 9, a fixed work roll 21 attached to a main shaft 28 via a fixed sleeve 25.
And a movable work roll 22 mounted on a movable sleeve 25 'provided on the fixed sleeve 25 so as to be movable in the axial direction of the main shaft 28 (reference document: Kawasaki Steel at the Japan Iron and Steel Institute Joint Study Group, Mizushima Steel) The 92nd Rolling Theory Subcommittee document, pressure 92-10).

Then, the variable width roll 23 is changed to a predetermined roll width W, that is, the fixed and movable work rolls 21,
To change the interval of 22, the electric motor 33 attached to the moving sleeve 25 'via the screw nut 32 is actuated, and the rotational movement of the electric motor 33 is converted into a linear movement by the screw nut 32. , The moving sleeve 25 ′ is moved in the axial direction of the main shaft 28.

[0009]

In order to produce H-section steels with a fixed outer process and to produce a large number of H-section steels with different inner process dimensions due to the recent small-lot production, it is frequently necessary. It is necessary to change the roll width for straightening in the roller straightening machine.

However, in the variable width roll for straightening described above, in order to change the roll width, the sleeve 25 in which the work rolls 21 and 22 are incorporated is removed from the main shaft 28 of the roller straightening machine by a hoist, and A nut is loosened and removed, and the length of the spacer 24 fitted in the sleeve 25 in the axial direction of the main shaft 28 is changed by using a hoist. Then, it is necessary to incorporate the sleeve 25, into which the spacer after the length change is fitted, into the main shaft 28. Therefore, since 7 to 9 rolls are usually provided for straightening, a great amount of work time is required to change all roll widths by the above-mentioned work.

On the other hand, in the above description, the roll width is the main axis.
Fixed and movable work rolls can be used for variable width rolls that can be changed without removing each work roll 21, 22 from 28.
It is necessary to provide the moving means 34 for adjusting the distance between the rollers 21 and 22 at a place other than the roll shaft portion.

Therefore, the roller straightening machine becomes a large-scale device and becomes expensive.

In the variable width roll in which the roll width can be changed without removing the work rolls 21 and 22 from the spindle 28, the electric motor 33 is used for varying the width.
It is assumed that the roller straightening machine is mounted on the roller, and in this case, the equipment cost becomes enormous and the roller straightening machine becomes expensive.

The present invention was devised in view of the above-mentioned circumstances, and its object is to easily and continuously change the width of a variable width roll for straightening in a roller straightening machine without changing the rolls. (EN) It is possible to provide a variable width roll type roller straightening machine which can reduce the roll rearrangement work and can prevent an increase in the productivity of shaped steel and an increase in straightening equipment.

[0015]

According to the present invention, the movable work roll is sandwiched between a part of the spacer of a normal roller straightening machine, that is, on both sides of the movable work roll, and the cylindrical shape has the same inner and outer diameters as the spacer. Of the pressing cylinder is incorporated, and the stroke of these two pressing cylinders is controlled by the control unit to be changed, whereby the movable work roll is moved, and the gap between the fixed work roll and
That is, the roll width of the variable width roll for straightening can be adjusted without permission.

Then, by setting the position of the movable work roll according to the inner diameter of the shaped steel by the ring-shaped pressing cylinders which are respectively installed before and after the movable work roll in the variable width roll for straightening, (EN) A series of external constant shape steels can be easily and continuously changed without changing the work roll for straightening, that is, removing the work roll for straightening from the spindle.

Therefore, according to the roller straightening machine of the present invention, the productivity of the shaped steel is improved and the straightening equipment is made compact by reducing the roll changing work for straightening.

Further, in order to attach the variable width roll for straightening to the main shaft, the sleeve for incorporating the variable width roll for straightening is provided in the usual spacer-incorporated portion, and the pressing cylinder is no different from the spacer. All you have to do is install it. Therefore, according to the roller straightening machine of the present invention, the sleeve can be used together with the conventional working method for attaching and detaching the sleeve, and the need for large-scale facility modification such as mounting an electric motor on the spindle is eliminated. ..

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The variable width roll type roller straightening machine of the present invention will be described below with reference to the illustrated embodiments.

The roller straightening machine 1 (see FIG. 1) is installed on a model steel production line (not shown) for H-section steel or the like, and is mounted on the spindle 3 while being held by spacers 2 at predetermined intervals in the axial direction. A variable width roll 6 including a movable work roll 4 and a fixed work roll 5 is provided.

Then, the spacers 2 on both sides of the roll, which hold the position of the movable work roll 4 in the variable width roll 6,
In place of the above, the pressing cylinder 7 is arranged at the disposing position. In addition, the movable work roll 4 is controlled by the control unit 8 by the pressing force of the both pressing cylinders 7, 7.
It is configured to be movable in the axial direction of the main shaft 3.

The movable work roll 4 and the fixed work roll 5 in this embodiment are held by the spacer 2 and the pressing cylinder 7 and incorporated into the sleeve 9, and the sleeve 9 is fitted into the main shaft 3 to make the main shaft 3 It is attached to 3.

Further, the control unit 8 includes a hydraulic pump 10 for supplying hydraulic pressure to the hydraulically operated pressing cylinder 7, and a switching valve provided between the hydraulic pump 10 and both pressing cylinders 7, 7. 11 and a lock valve 12 are provided.

Using the roller straightening machine 1 having such a structure, the H-section steel 14 as shown in FIG. 1 is straightened as follows.

First, by setting the state of the switching valve 11 to the state shown in FIGS. 2 and 3, the state of pressure oil supply from the hydraulic pump 10 is controlled, and the direction toward one pressing cylinder 7 side (see FIG. 2). ), Or the movable work roll 4 is moved toward the other pressing cylinder 7 side (see FIG. 3). As a result, the interval between the movable work roll 4 and the fixed work roll 5 shown in FIG. 1, that is, the roll width W of the variable width roll 6 for straightening is set to a predetermined width.

Next, by setting the state of the switching valve 12 to the state shown in FIG. 4, the state of pressure oil supply from the hydraulic pump 10 is controlled to apply hydraulic pressure to both the pressing cylinders 7, 7.
This prevents each movable and fixed work roll 4, 5 from moving during the straightening operation.

After that, the lock valve 12 is operated to bring the lock valve 12 into the state shown in FIG. 5 so as to reduce the load on the hydraulic pump 10. To do. Then, in this state, the H-section steel 13 is straightened.

As described above, according to the roller straightening machine 1 of the present invention, the straightening work of the H-section steel 13 having various flange width dimensions does not require the work of changing the movable work rolls 4 and can be carried out easily in a short time. And it can be done reliably. From this, as shown in the graph of FIG. 6, the same straightening effect as that of the conventional spacer-mediated straightening machine was obtained without performing the work of changing the movable work rolls 4.

Since the main shaft 3 is a rotating body, a rotary joint may be used to eliminate the connection of the hydraulic pressure supply hose during width adjustment. Further, if the roll width is electrically measured from the outside with a linear sensor or the like, the hydraulic pump 10 is automatically controlled and APC (automatic position control) is also possible.

[0030]

EFFECT OF THE INVENTION In a straightening machine for shaped steel such as H-shaped steel, instead of the spacers on both sides of the roll that holds the position of the movable work roll in the variable width roll, a pressing cylinder is arranged at that position. By doing so, the roll width of the variable width roll for straightening can be changed steplessly.

Therefore, since it is not necessary to perform the roll rearrangement work, the efficiency of the straightening work can be improved and the productivity of the shaped steel can be improved. In addition, large-scale capital investment can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic view showing a variable width roll type roller straightening machine of the present invention.

FIG. 2 is a schematic view showing a moving state of movable work rolls in the variable width roll type roller straightening machine of the present invention.

FIG. 3 is a schematic view showing a moving state of a movable work roll in the variable width roll type roller straightening machine of the present invention.

FIG. 4 is a schematic view showing a fixed state of movable work rolls in the variable width roll type roller straightening machine of the present invention.

FIG. 5 is a schematic view showing a fixed state of movable work rolls in the variable width roll type roller straightening machine of the present invention.

FIG. 6 is a graph showing a comparison of the straightening effect between a variable width roll type roller straightening machine of the present invention and a conventional spacer interposing type straightening machine.

FIG. 7 is a sectional view showing a conventional variable width roll type roller straightening machine.

FIG. 8 is a sectional view showing a conventional variable width roll type roller straightening machine.

FIG. 9 is a sectional view showing a conventional variable width roll type roller straightening machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Roller straightening machine, 2 ... Spacer, 3 ... Main shaft, 4 ... Movable work roll, 5 ... Fixed work roll, 6 ... Variable width roll, 7 ... Pressing cylinder, 8 ... Control part, 9 ... Sleeve,
10 ... hydraulic pump, 11 ... switching valve, 12 ... lock valve, 13 ... H
Shaped steel.

Claims (1)

1. A width composed of a movable work roll and a fixed work roll, which are installed on a type steel production line for H-section steel or the like, and which are attached to the main spindle while being held at predetermined intervals in the axial direction by spacers. A roller straightening machine having a variable roll, wherein the spacers on both sides of the roll that hold the position of the movable work roll in the variable width roll are replaced with a pressing cylinder at that position, and The variable width roll type roller straightening machine, wherein the movable work roll is movable in the axial direction of the main shaft by the pressing force of the pressing cylinders controlled by the control unit.