JP3413419B2 - Roller straightening machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller straightening machine for straightening deformation of shaped steel, and more particularly to a roller straightening machine for straightening H-shaped steel.

[0002]

2. Description of the Related Art Generally, rolled H-section steel is hot-formed and rolled by a universal mill consisting of horizontal rolls and vertical rolls, and then cooled. At this time, the H-section steel has a thickness difference in the cross section between the wave and the flange, and a temperature difference in the cross section due to the difference in the thickness in the cross section and the difference in the entire cooling process, which causes warpage, bending, and an angular failure of the flange. Etc. occur. The warpage or bending that has occurred can be straightened by a straightening roller of a roller straightening machine.

[0003]

However, if the stress generated during the rolling and cooling process remains as a residual stress in the R portion of the corner where the wave and the flange face each other, a crack is generated at this portion during the correction. there is a possibility. Further, if the residual stress in the R portion remains even after straightening by the straightening machine, there is a possibility that normal performance as the H-section steel cannot be exhibited. Therefore, it is conceivable that such residual stress in the rolled H-section steel is released and removed by performing rolling to the R portion (hereinafter appropriately referred to as fine rolling) to which a known technique such as peening is applied. There is no prior art regarding a specific method or device configuration therefor.

An object of the present invention is to provide a roller straightening machine capable of removing the residual stress in the R section by performing fine rolling on the R section of the H-section steel.

[0005]

In order to achieve the above object, according to the present invention, in a roller straightening machine for straightening H-section steel, the H-section steel can be arranged at the same position in the pass direction.
A pair of lower horizontal rollers, and a pair of vertical rollers contacting the outer surface of the flange of the H-shaped steel and having a central axis in a vertical plane including the central axes of the pair of upper and lower horizontal rollers ; vertical
And a chock rotatably supporting the roller , wherein each of the upper horizontal roller and the lower horizontal roller is composed of two split rollers arranged so as to be expandable and contractable in the roller axial direction, It is a double-supported structure in which both ends of a roller shaft are pivotally supported, and the lower horizontal roller is configured so that the roller shaft can move up and down in the vertical direction .
Provided near the lower end of the bearing box at both ends of the upper horizontal roller
Engage slidably in the axial direction of the upper horizontal roller in the groove
Roller slider characterized by having a slider part
A genuine machine is provided.

That is, in order to finely roll the corner R between the wave and the flange of the H-section steel, it is necessary to apply the rolling load only to the R section without applying the bending force to the wave and the flange section. is there. Then, at this time, if the rolling reaction force of the R portion acts in the width direction of the wave, it leads to the deformation of the H-section steel, and this must also be avoided.

In the present invention, the split rollers constituting the upper and lower horizontal rollers are configured to be capable of expanding and contracting their mutual intervals in the roller axial direction, and the vertical rollers are configured to be movable in the horizontal roller axial direction. . As a result, for example, when these hydraulic cylinders driven by pressure oil are used to expand and contract and move, the H-shaped steel flange is sandwiched between the vertical roller and the lower side surface of the upper horizontal roller, the upper side surface of the lower horizontal roller and the vertical roller.
A rolling load can be applied to the corner R portion where the wave and the flange of the shaped steel face each other. The magnitude of the rolling load at this time can be appropriately adjusted by controlling the pressure oil pressure to each hydraulic cylinder to a predetermined value so that the rolling reaction force of the R portion does not act in the width direction of the wave. .

On the other hand, at this time, since the lower horizontal roller is constructed so that the roller shaft can move vertically in the vertical direction, the upper and lower parts can be moved up and down by expanding and contracting them with a hydraulic cylinder driven by pressure oil, for example. The distance between the lower horizontal rollers can be adjusted. Therefore, the upper and lower horizontal rollers can be brought into contact with the wave while preventing the bending force from acting on the wave and the flange portion.

Further, since the upper and lower horizontal rollers are both-supporting type, the vertical rigidity of the straightening machine is increased, the bending itself due to the straightening load is reduced, and the slight displacement of bending can be caused by the horizontal roller shaft. Since the directions are symmetrical with respect to each other, it is possible to easily perform accurate pressing without adjusting the angle of the vertical roller.

Therefore, only the flange of the H-section steel and the corner R portion of the wave can be finely rolled by the optimum load. As a result, the residual stress in the R portion is removed and the occurrence of cracks is prevented, so that it is possible to manufacture H-section steel with high accuracy and high quality.

Further, since the upper and lower horizontal rollers and the vertical roller can be moved in each direction in this way, it is possible to cope with various sizes of H-section steels only by operating a hydraulic cylinder, for example.

[0012]

More preferably, in the roller straightening machine, a first hydraulic cylinder fixed to the bearing boxes at both ends of the upper horizontal roller for advancing and retracting the chock, and a first hydraulic cylinder supplied from a hydraulic source. A first pressure control valve for controlling the pressure of the pressure oil, and a first ON / OFF switching valve capable of connecting / disconnecting a pipe line connecting the first pressure control valve and the first hydraulic cylinder. And a first directional switching valve provided in a pipeline for supplying pressure oil from the hydraulic pressure source to the first hydraulic cylinder without passing through the first pressure control valve and the first ON / OFF switching valve. A first pressure control valve and a first directional control valve for controlling the operation of the first directional control valve
A roller straightening machine is provided which further comprises:

In order to achieve the above object, the present invention provides
According to the roller straightening machine for straightening H-section steel,
A pair of upper and lower horizontal parts that can be placed at the same position in the path direction of H-section steel
Contact the roller and the outer surface of the H-section steel flange,
Is in the vertical plane including the central axes of the pair of upper and lower horizontal rollers
A pair of vertical rollers and both ends of the lower horizontal roller
Second hydraulic cylinder that vertically moves the bearings in the vertical section
Is supplied to the second hydraulic cylinder from the hydraulic source.
And a second pressure control valve for controlling the pressure of the pressure oil.
The pressure control valve and the second hydraulic cylinder
A second ON / OFF switching valve that can connect and disconnect the pipeline,
From the hydraulic source, the second pressure control valve and the second ON
Pressure oil is supplied to the second hydraulic cylinder without passing through the OFF switching valve.
A second directional valve provided in a pipeline for supplying
Controls the operation of the second pressure control valve and the second directional control valve.
A second control means for controlling the upper horizontal roller and
The lower horizontal rollers are spaced apart from each other in the roller axial direction.
If it is composed of two split rollers that are extendable and retractable
Both have a double-supported structure in which both ends of the roller shaft are supported.
And the pair of vertical rollers are rollers of the horizontal roller.
It is characterized by being configured to be movable in the axial direction.
-La straightening machine is provided.

[0015]

[0016]

Further, preferably, the roller straightening machine further comprises first detecting means for outputting a detection signal corresponding to a stroke amount of the corresponding first or second hydraulic cylinder, and the first detecting means . Alternatively, the roller straightening machine is characterized in that the second control means switches the corresponding first or second directional control valve according to the detection signal from the first detection means. Also achieve the above objective
For this reason, according to the present invention, a roller correction for straightening H-section steel is performed.
In a normal machine, it is possible to expand and contract the distance between each other in the roller axis direction
So that the inner sleeve and outer three fit together.
It consists of two split rollers, one on each
Top and bottom that can be placed at the same position in the pass direction of the H-section steel
Contact with a pair of horizontal rollers and the outer surface of the H-section steel flange
However, the central axis includes the central axis of the pair of upper and lower horizontal rollers.
A pair of vertical rollers located in the vertical plane, and the inner sleeve.
Can be moved back and forth in the horizontal roller axial direction with respect to the outer sleeve.
The third hydraulic cylinder to activate and the third from the hydraulic source
To control the pressure of pressure oil supplied to the hydraulic cylinder of
3 pressure control valve, this third pressure control valve and the third
No. 1 that can connect and disconnect the pipeline connecting to the hydraulic cylinder
3 ON / OFF switching valve and from the hydraulic pressure source to the third
Without the pressure control valve and the third ON / OFF switching valve,
It is provided in the pipeline that supplies pressure oil to the third hydraulic cylinder.
A third directional control valve, the third pressure control valve, and
Third control means for controlling the operation of the third directional control valve,
Detection according to the stroke amount of the third hydraulic cylinder
First detection means for outputting a signal, and the upper and lower horizontal low
The second that can detect the passage of H-section steel on the upstream side of the La path
And a lower horizontal roller and a lower horizontal roller.
Each of the rollers is a double-sided type in which both ends of the roller shaft are supported.
The lower horizontal roller has a structure in which the roller shaft is in the vertical direction.
The pair of vertical rollers is configured to be movable up and down.
Is configured to be movable in the roller axis direction of the horizontal roller.
And the third control means is the first detection means.
The third directional control valve is turned off according to the detection signal from
In addition, the detection signal from the second detection means
Accordingly, the third ON / OFF switching valve may be switched.
A roller straightening machine is provided.

This makes it possible to detect the position of the vertical roller in the axial direction of the horizontal roller, the vertical position of the lower horizontal roller, or the interval between the split rollers, so that, for example, at the start of fine rolling, the first to third ONs are performed. -While holding the OFF switching valve at the neutral position, the first to third directional switching valves are switched to move forward / backward and move, and the corresponding roller performs fine rolling.
When the position having a slight gap with respect to the outer dimension of the shaped steel is reached, the first to third directional control valves can be switched to the neutral position and the roller can be put in the standby state. Further preferably, the roller straightening machine further comprises a second detecting means capable of detecting passage of the H-section steel on the upstream side of the paths of the upper and lower horizontal rollers, and the first or second control means. , According to the detection signal from the second detection means,
There is provided a roller straightening machine characterized by switching the corresponding first or second ON / OFF switching valve.

As a result, at the start of fine rolling, first of all,
~ The third ON / OFF switching valve is held in the neutral position, and the first to third ON / OFF switching is performed after a predetermined time when the second detecting means detects that the tip of the H-shaped steel has passed. If the valve is in the communicating position and the pressures controlled by the first to third pressure control valves are guided to the first to third hydraulic cylinders, the vertical roller on the downstream side of the path of the second detecting means will be described. Alternatively, it is possible to reliably prevent accidents in which the upper and lower horizontal rollers start fine rolling without the H-section steel and come into contact with other rollers and are damaged. Further, at the time of finishing the straightening, after the predetermined time after the second detecting means detects that the tail end of the H-shaped steel has passed, the first to third ON-
If the OFF switching valve is configured to switch to the shut-off position, the vertical roller or the upper and lower horizontal rollers on the downstream side of the path of the detecting means may continue to press without the H-section steel and contact or damage other rollers. It can be reliably prevented. In this way, since the fine rolling can be started and ended without stopping the straightening material, the work can be smoothed and the efficiency can be improved.

[0020]

[0021]

[0022]

[0023]

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a front view showing the entire structure of the large-sized roller straightening machine according to this embodiment.

In FIG. 2, the straightener main body 46 is provided with an elevating device 2 for elevating and lowering the frame 1, and in the frame 1, an upper roller and bearing structure 4, an upper roller support 7, a lower roller and a bearing structure. 5, a lower roller support 9 provided with a lower roller and a lifting device 8 for the bearing assembly 5 is arranged vertically as shown in the drawing along the longitudinal direction (pass direction) of the straightening material (for example, H-shaped steel) 11. Composed.

That is, the upper roller / bearing structure 4 and the upper roller support 7 are located at the positions # 2, # 4, # in the pass direction.
6 and # 8 are provided at four positions, and the lower roller and the bearing structure 5 and the lower roller support 9 are located at the position # in the pass direction.
It is provided at six locations of 0, # 1, # 3, # 5, # 7, and # 9. Then, # 1 lower roller and bearing structure 5 and
2 The upper roller and the bearing structure 4 are arranged at the same position in the pass direction.

The lower roller / bearing structure 5 and the lower roller support 9 at the position # 0 in the pass direction are the # 1 lower roller / bearing structure 5, the lower roller support 9, and the # 2 upper roller / bearing structure. 4 and the lower roller support 7 are provided on the upstream side of the path.

The lifting device 2 positions the upper roller and the bearing structure 4 with respect to the transport table according to the size of the H-shaped steel 11.

Each of the lower roller and the bearing structure 5 is # 1, # 3, # 5, # 7, # depending on the position in the path direction.
9 horizontal rollers (detailed structure will be described later), the elevating device 8 elevates and lowers the lower roller and the bearing structure 5,
A bending force can be applied to the H-section steel 11. In addition,
# 3, # 5, # 7, # 9 The lifting device 8b provided on the lower roller support 9 includes a screw and a worm gear (not shown), and the lifting device 8a provided on the # 1 lower roller support 9 is provided.
Is the second hydraulic cylinder 207a, b (see FIG.
(See), which allows the roller shaft of each lower horizontal roller to move vertically in the vertical direction. The lower roller support 9 incorporates these lifting devices 8.

Each of the upper roller and the bearing structure 4 is provided with # 2, # 4, # 6 and # 8 horizontal rollers (detailed structure will be described later) according to the position in the path direction. , These upper roller and bearing assembly 4 are built in. That is, the upper roller and bearing structure 4 is suspended from the frame 1 via the upper roller support 7.

In the bearing box of the # 2 upper horizontal roller, H
A vertical roller 13 is provided which is capable of contacting the outer surface of the flange of the shaped steel 11 and whose central axis is located in a plane including the central axes of the # 1 lower horizontal roller and the # 2 upper horizontal roller (details will be described later).

The supporting structure of the roller shaft of the upper roller / bearing structure 4 and the lower roller / bearing structure 5 is of a double-support type, which makes it possible to equalize and reduce the deflection due to the acting load of each part, and It is possible to efficiently carry out straightening of shaped steel with a section modulus and high-precision straightening. The upper roller and the horizontal roller (described later) of the bearing structure 4 are driven via a spindle coupling 241 (described later) by a driving device (not shown) having a motor and a speed reducer.

In the straightener 46, the # 1, # 3 lower roller support 9 and the # 7, # 9 lower roller support 9 are moved in the pass direction by a screw nut method, respectively.
3-pitch moving device 3a and # 7, # 9 pitch moving device 3
b, by which each lower roller support 9
Can move in the path direction. However, the # 5 lower horizontal roller is fixed to the frame 1. Similarly, the straightener 46 also has a # 2 pitch for moving the # 2 upper roller support 7, the # 4 upper roller support 7, and the # 6, 8 upper roller support 7 in the pass direction by a screw nut method. Moving device 10a, # 4 pitch moving device 10c and # 6
The # 8 pitch moving device 10b is provided so that each upper roller support 7 can be moved in the pass direction. With such a configuration, the upper and lower roller supports 7 and 9 are configured to form an optimum roller pitch in accordance with the type and specifications of the straightening material that is a shaped steel.
As shown in FIG. 2, the 1 lower roller and the # 2 upper roller can be arranged at the same position in the pass direction when fine rolling is performed.

Further, the straightening machine 46 has a straightening material passage recognition sensor 69 as a second detecting means capable of detecting passage of the H-section steel 11 on the upstream side of the # 1 and # 2 horizontal rollers in the path.

In the above structure, the H-section steel 11 rolled and cooled in the rolling facility (not shown) on the upstream side of the path is carried in at the entry-side table 111, and the carried-in straightening material H-section steel 11 is provided. Is finely rolled by pressing the flange portion from the outside by the vertical roller 13 provided in the bearing box of the # 2 horizontal roller while contacting the waves from the vertical direction with the # 1 and # 2 horizontal rollers (details will be described later). Further, after warping and bending are corrected by # 3 to # 9 horizontal rollers, the exit side table 1
It is carried out by 12. At this time, the # 0 lower horizontal roller is used to take the correction reaction force of the # 3 to # 9 upper and lower horizontal rollers. As described above, it is possible to simultaneously perform the operations of fine rolling and straightening, so that it is possible to improve efficiency and productivity.

When only fine rolling is performed by the # 1 lower horizontal roller and the # 2 upper horizontal roller, the # 0 lower horizontal roller and the # 3 to # 9 upper and lower horizontal rollers function merely as conveying rollers.

Now, the # 2, # 4, # 6 and # 8 upper rollers and the bearing structure 4 will be described in detail with reference to FIG. The main body 4 is mainly composed of an operation side bearing unit A, a roller / sleeve assembly unit B, and a drive side bearing unit C, and these are separable. Hereinafter, the details of the operation side bearing unit A, the roller / sleeve assembly unit B, and the drive side bearing unit C will be sequentially described.

(1) Operation Side Bearing Unit A FIG. 3 is a side sectional view showing the structure of the # 2 upper roller and the bearing structure 4.

In FIG. 3, the operation side bearing unit A is provided on the operation side bearing case (bearing box) 113a to which the wheels 14a are attached, the bearing 15a, and the inner ring 16 of the bearing 15a, and the gear 1 is provided on the outer circumference.
Rotating ring 17 forming 7a, grooved screw ring 18 having an inner screw threadedly engaged with this rotating ring 17 and having a gear 18a formed on the outer periphery thereof, moving body case 19, slider 22, thrust bearing 23, protrusion for rotation Inner slide ring 24 having a gear 24a formed on its inner portion, and a slide screw ring 2 having an inner screw threadedly engaged with the inner slide ring 24 and having a gear 25a formed on the outer periphery thereof
5. The sensor 26 and the like for confirming the movement amount.

A chock 6 for rotatably supporting the vertical roller 13a is provided below the bearing case 113a.
7a is connected. FIG. 3 showing the detailed structure of this connection.
FIG. 4 shows an arrow view as seen from the middle line. As shown in FIG. 4, the chock 67a is the bearing case 1
A groove 113aA provided in the vicinity of the lower end of 13a is provided with a substantially protrusion-shaped engaging portion 67aA that is slidably engaged in the axial direction of the horizontal roller.

Returning to FIG. 3, the chock 67a is moved back and forth in the horizontal roller axial direction by the first hydraulic cylinder 68a fixed to the bearing case 113a, whereby the vertical rollers 13a and 13b are moved in the horizontal roller axial direction. It becomes movable and a pressing force is applied to the H-section steel 11. A hydraulic circuit for supplying pressure oil to the first hydraulic cylinder 68a will be described later.

The piston 2 connected to the slider 22 is provided in the vicinity of the operation side end of the bearing case 113a.
1 and a third hydraulic cylinder 120a that houses the piston 21 slidably in the axial direction are provided.

(2) Roller / Sleeve Assembly Unit B In FIG. 3, the roller / sleeve assembly unit B is an operation side roller composed of a split roller 27a, an expansion screw ring 28a, a stopper ring 29a, and an operation side roller sleeve (outer sleeve) 30. -Sleeve assembly unit B1, split roller 27b, expansion screw ring 28b, stopper ring 29b, spacer 180, drive side roller sleeve 31
Drive side roller / sleeve assembly unit B2 consisting of (inner sleeve)
1 and B2. The split roller 27a and the split roller 27b form one horizontal roller (in this case, an upper horizontal roller).

Operation side roller / sleeve assembly unit B1
The roller sleeve 30 of FIG. 1 and the roller sleeve 31 of the driving side roller sleeve assembly unit B2 are fitted to each other to form a set of roller sleeve assembly unit B. The operation side roller sleeve 30 and the driving side roller sleeve 31 are fitted to each other by a key (so that the roller sleeve 31 can move in the axial direction with respect to the roller sleeve 30 and the rotation of the roller sleeve 31 is transmitted to the roller sleeve 30. (Not shown).

The roller sleeve 30 of the operation side roller / sleeve assembly unit B1 is detachably connected to the grooved screw ring 18, and the roller sleeve 31 of the drive side roller / sleeve assembly unit B2 is connected to the inner slide ring 24. It is detachably connected.

Further, the split rollers 27a and 27b are shaped such that the portions (projections 27aA and bA) that press the R portion 11A of the H-shaped steel 11 project, as shown in FIG. 10 described later.

(3) Drive-side bearing unit C In FIG. 3, the drive-side bearing unit C is a wheel 14b.
It is composed of a drive side bearing case 113b to which is attached, a bearing 15b, and a shaft 32 positioned on the bearing case 113b via the bearing 15b.

One side of the shaft 32 is provided with the roller sleeve 3
1, the inner slide ring 24 fits, and the other fits the spindle coupling 241. The shaft 32 and the roller sleeve 31 are fitted to each other via a key (not shown) so that the roller sleeve 31 can move in the axial direction with respect to the shaft 32 and the rotation of the shaft 32 is transmitted to the roller sleeve 31. Has been done.

Similarly to the operation side unit A, a chock 67b for rotatably supporting the vertical roller 13b is connected to the lower portion of the bearing case 113b. Then, like the chock 67a of the operation side unit A, the chock 67b is a substantially protrusion-shaped engagement which engages with a groove (not shown) provided near the lower end of the bearing case 113b so as to be slidable in the horizontal roller axial direction. The first hydraulic cylinder 68b fixed to the bearing case 113b advances and retracts in the axial direction of the horizontal roller and applies a pressing force to the H-section steel 11. A hydraulic circuit for supplying pressure oil to the first hydraulic cylinder 68b will be described later.

In the case of a shaped steel having a size capable of sharing the split rollers 27a and 27b, the outer width L of the split rollers 27a and 27b can be set to an arbitrary value, that is, the distance between them can be expanded and contracted. There is. In FIG. 3, pressure oil can be supplied to the bottom side oil chamber 120aA and the rod side oil chamber 120aB of the third hydraulic cylinder 120a from the hydraulic circuit shown in FIG. The slider 22 connected to the mobile case 1
Slide axially inside 9.

Simultaneously with the axial movement of the slider 22, the inner slide ring 24 connected to the slider 22 and the driving side roller sleeve 31 connected to the inner slide ring 24 slide on the shaft 32. Since the operation side roller sleeve 30 is fixed here, the drive side roller sleeve 31 slides in the axial direction with respect to the operation side roller sleeve 30, and the outer width L of the split rollers 27a and 27b can be easily adjusted. can do. At this time, regarding the position setting of the split roller 27b on the drive side, it is desirable that the sensor 26 detect the movement amount of the split roller 27b.

The # 2 upper roller and the bearing assembly 4 have been described above, but the bearing case of the # 1 lower roller and the bearing assembly 5 is upside down.
And the vertical rollers 13, the chocks 67a and b, the first hydraulic cylinders 68a and 68b, etc. are similarly configured, and the third hydraulic pressure for adjusting the outer width L of the split rollers 27a and 27b. Cylinder 12 similar to cylinder 120a
0b (see FIG. 1 described later).

Regarding the upper roller and bearing structure 4 other than # 2, that is, # 4, # 6 and # 8 upper roller and bearing structure 4, the vertical roller 13 is omitted and Protrusions 27aA, 27 of rollers 27a, b
In addition to the fact that bA is not provided, the split rollers 27a, b
Since the mechanism for changing the outer width L is different, the structure is slightly different. A side sectional view showing the structure of the # 4, # 6, # 8 upper roller and the bearing structure 4 is shown in FIG. The same members as those in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted. Figure 5
3 showing the # 2 upper roller and bearing assembly 4 in FIG.
The first difference is that the vertical roller 13 is omitted, and accordingly, the chocks 67a and 67b and the first hydraulic cylinder 68 are accompanied.
That is, a and b are omitted. Further, the third hydraulic cylinder 120a, the piston 21 and the like are omitted, and instead, the outer width L of the split rollers 27a, 27b is changed by an electric drive system using a motor. That is, the operation side bearing case 113a is provided with a motor 65 that rotates the worm 66 to form a wheeler nut type moving device. The motor 65 rotates the worm gear 21 in the roller circumferential direction via the worm 66. Let
Here, a screw 22a is cut on the outer surface of the slider 22, and the inner surface of the worm gear 21 and the screw 22a are screw-engaged. At this time, the slider 22 attaches the key 22 b provided at the tip of the slider 22 to the moving body case 19.
Since the worm gear 21 is prevented from rotating by engaging with the axial groove 20 formed on the inner peripheral surface of the slider 22, the slider 22 slides in the axial direction inside the movable body case 19 by the rotation of the worm gear 21. Simultaneously with the axial movement of the slider 22, the inner slide ring 24 connected to the slider 22 and the drive side roller sleeve 31 connected to the inner slide ring 24 slide on the shaft 32. Since the operation side roller sleeve 30 is fixed, the drive side roller sleeve 31 slides in the axial direction with respect to the operation side roller sleeve 30,
The outer width L of the split rollers 27a, 27b is adjusted.

Further, # 0, # 1, # 3, # 5, # 7, #
9 Regarding the lower roller and the bearing structure 5, the above-mentioned # 4, # are also performed except that the bearing case is turned upside down.
6, # 8 upper roller and bearing structure 4 are constructed in the same manner.

The main part of this embodiment is the # 1 lower horizontal roller,
The # 2 horizontal roller and the vertical rollers 13a and 13b are used for fine rolling. The first hydraulic cylinders 68a, 68b provided in the above-mentioned structures 4 and 5 relating to this fine rolling work,
A circuit diagram of a hydraulic circuit for supplying pressure oil to 207a, b, 120a, b is shown in FIG.

In the hydraulic circuit shown in FIG. 1, a circuit for supplying pressure oil to the first hydraulic cylinders 68a, 68b, a circuit for supplying pressure oil to the second hydraulic cylinders 207a, 207b, a third circuit.
The circuits for supplying the pressure oil to the hydraulic cylinders 120a and 120b will be separately described below.

(I) Circuit for Supplying Pressure Oil to First Hydraulic Cylinders 68a, b In FIG. 1, a circuit related to the first hydraulic cylinders 68a, b is a hydraulic pump as a pressure oil source (in the figure, P
First), and first pressure control valves 132a and 132b for controlling the pressure of the pressure oil supplied to the first hydraulic cylinders 68a and 68b, respectively.
A first ON / OFF switching valve 135 capable of connecting / disconnecting a pipe line connecting b with the first hydraulic cylinders 68a, b.
a, b and the hydraulic pump P to the first pressure control valve 132
a, b and first ON / OFF switching valves 135a, b, and first directional switching valves 131a, 131b provided in a pipeline for supplying pressure oil to the first hydraulic cylinders 68a, 68b. 1 ON / OFF switching valve 135a, b and the first directional switching valve 131a, b for protecting the circuit provided by branching from the conduit between the bottom hydraulic chamber of the first hydraulic cylinder 68a, b Accumulators 134a, 134b and relief valve 1
33a and 33b. In addition, the hydraulic cylinder 68a,
Position sensors 130a and 130b, which serve as first detection means for outputting a detection signal corresponding to the stroke amount, are provided in b.

(II) Second hydraulic cylinder 207a, b
Circuit for supplying pressure oil to the hydraulic circuit shown in FIG. 1 includes circuits related to the second hydraulic cylinders 207a and 207a from the hydraulic pump P as the pressure oil source to the second circuit.
Second pressure control valve 139 for controlling the pressure of the pressure oil supplied to the hydraulic cylinders 207a and 207b of the hydraulic cylinders 207a and 207b, respectively, and the second pressure control valve 139 and the second hydraulic cylinder 207.
Second ON that can connect and disconnect the pipeline connecting a and b
An OFF switching valve 140 and a pipeline for supplying pressure oil from the hydraulic pump P to the second hydraulic cylinders 207a, 207b without passing through the second pressure control valve 139 and the second ON / OFF switching valve 140. A second directional control valve 138a, b,
The second ON / OFF switching valve 140 and the second directional switching valves 138a, 138a and the second hydraulic cylinder 207a,
The circuit-protecting accumulators 141a and 141b, which are provided by branching from the pipeline between the bottom side oil chamber of b and the oil chamber of the rod side of the second hydraulic cylinder 207a and 207b, are connected. And a direction switching valve 146 provided in the pipeline. Further, in the second hydraulic cylinders 207a and 207b, there are provided position sensors 125a and 125b as first detecting means for outputting a detection signal according to the stroke amount.

Note that the direction switching valve 146 is normally always switched to the left position in the drawing, and is switched to the right position in the drawing only in an emergency, and the second hydraulic cylinder 207 is operated.
The rod-side oil chambers a and b, the pump P, and the tank (illustrated as T in the drawing) communicate with each other.

(III) Third hydraulic cylinder 120a,
Circuit for supplying pressure oil to b In FIG. 1, circuits related to the third hydraulic cylinders 120a and 120b are the hydraulic pump P as the pressure oil source to the third circuit.
Third pressure control valve 143 for controlling the pressure of the pressure oil supplied to each of the hydraulic cylinders 120a and 120b, and the third pressure control valve 143 and the third hydraulic cylinder 120.
3rd ON that can connect / disconnect the pipeline connecting a and b
An OFF switching valve 144 and a pipeline for supplying pressure oil from the hydraulic pump P to the third hydraulic cylinders 120a, 120b without going through the third pressure control valve 143 and the third ON / OFF switching valve 144 are provided. A third directional control valve 142a, 142b,
The third ON / OFF switching valve 144 and the third directional switching valves 142a, 142b and the third hydraulic cylinder 120a,
and a circuit protection accumulator 145a, b provided by branching from a conduit between the bottom side oil chamber of b.
Further, the pipe line branched from the pipe line connecting the directional control valve 146 described in (II) above and the rod-side oil chambers of the second hydraulic cylinders 207a, 207b is the third hydraulic cylinder 12a.
It is connected to the rod side oil chambers 0a and 0b. Further, in the third hydraulic cylinders 120a, 120b, position sensors 126a, 126b as first detecting means for outputting a detection signal according to the stroke amount are provided.

In the configuration of FIG. 1 described above, the operation of each pressure control valve, ON / OFF switching valve, and pressure control valve is controlled by the control device 200. This is shown in FIG.
In FIG. 6, the control device 200 has a first ON / OFF
A first control valve that controls the operation of the switching valves 135a and 135b, the first pressure control valves 132a and 132b, and the first directional switching valves 131a and 131b.
Control means, the second ON / OFF switching valve 140, the second
Pressure control valve 139 and second directional control valves 138a, b
Control means for controlling the operation of the third ON / OF
The F switching valve 144, the third pressure control valve 143, and the third direction switching valves 142a and 142b also serve as third control means for controlling the operations of the valves.

That is, the control device 200 includes the correction material passage recognition sensor 69, the position sensors 130a and 130b in the hydraulic cylinders 68a and 68b, and the second hydraulic cylinder 207.
Position sensors 125a, b in a, b and position sensors 126a, b in the third hydraulic cylinder 120a, b.
From the first pressure control valve 132a, 132b, and the first ON / OFF switching valve 135
a, b, the first directional switching valves 131a, b, the second pressure control valve 139, the second ON / OFF switching valve 140, the second directional switching valves 138a, b, the third pressure control valve 143, Third ON / OFF switching valve 144, third directional switching valve 14
2a, b operation is controlled. Hereinafter, the fine rolling operation procedure in the straightening machine 46 having the above configuration will be described with reference to FIG. 7 showing the content of this control.

First, the control device 200 is previously provided with the first to third hydraulic cylinders 68a, 6a corresponding to the standby state (described later) corresponding to the shape of the straightening material (for example, H-shaped steel) 11.
Optimum first to third hydraulic cylinders 68a, 68b, 2 according to the stroke amount of 8b, 207a, 207b, 120a, 120b and the physical properties of the material forming the H-section steel 11
The pressing forces of 07a, 207b, 120a, 120b are stored. Then, first, in step S1, the first to third ON / OFF switching valves 135a, 135b, 140, 14
4 to output the control signal to the first to third ON / OFF switching valves 135a, 135b, 140, 144 to the OFF position (shutoff position), and the first to third directional switching valves 131a, 131b, 138a, 138b, 142a,
A control signal is output to 142b, and the first directional control valve 131
a and 131b to the neutral position, and the second and third directional control valves 138a, 138b, 142a, 1
42b is switched to the right side position in FIG. 1 (the position where the tank T and the cylinder bottom side are connected).

Next, in step S2, the worker inputs the material number representing the type of the H-section steel 11 by the input means (not shown). After that, the procedure proceeds to step S3, where a control signal is output to the first to third pressure control valves 132a, 132b, 139, 143, and the first to third pressure control valves 132a, 132.
b, 139, 143 to the first to third hydraulic cylinders 6
8a, 68b, 207a, 207b, 120a, 120
The pressure in the pipeline on the b side is an optimum predetermined pressure (higher than the pump pressure) according to the physical properties of the material forming the straightening material of that number.
Controlled by. Thereby, the first to third pressure control valves 1
32a, 132b, 139, 143 to the first to third O
N / OFF switching valves 135a, 135b, 140, 144
Up to the predetermined pressure.

Next, in step S4, the first to third directional control valves 131a, 131b, 138a, 138b, 142.
A control signal is output to a and 142b, and the first to third directional control valves 131a, 131b, 138a, 138b, 142 are output.
a and 142b are switched to the left position in the drawing. As a result, the pressure oil is supplied to the bottom side of the first hydraulic cylinders 68a, 68b, and the vertical rollers 13a, 13b move inward. Further, pressure oil is also supplied to the bottom side of the second hydraulic cylinders 207a, 207b via the single throttle circuits 127a, 127b. At this time, the same pressure oil is supplied to the rod side as a balance pressure, but the second hydraulic cylinder 207 is affected by the difference in pressure receiving area between the bottom side oil chamber and the rod side oil chamber.
a and b move in the extension direction, and the # 1 lower horizontal roller rises. Similarly, pressure oil is also supplied to the bottom side of the third hydraulic cylinders 120a and 120b via the single throttle circuits 127a and 127b. At this time, the same pressure oil is supplied to the rod side as a balance pressure, but the third hydraulic cylinder 120 operates in the extending direction due to the difference in pressure receiving area between the bottom side oil chamber and the rod side oil chamber. The split roller 27b moves in a direction away from the split roller 27a, and the distance between the split roller 27b and the split roller 27a is increased. Then, in step S5, the second and third directional control valves 138a, b and 1
42a and 42b, via a known electric-hydraulic conversion means (not shown) provided in the drive unit, a pilot hydraulic pressure signal is output to the second and third pilot check valves 161a, b and 162a, b to open. Put in a state.

Then, in step S6, each position sensor 13
0a, 130b, 125a, 125b, 126a, 12
The first to third hydraulic cylinders 68a detected by 6b,
Strokes 68b, 207a, 207b, 120a, 120b are input, and in step S7, the standby state according to the shape of the H-section steel 11 has been reached (that is, whether the vertical roller 13 has advanced to a predetermined position, or # 1 lower horizontal). It is determined whether the roller has risen to a predetermined position or whether the split roller 27b is separated from the split roller 27a by a predetermined distance. If the standby state has not been reached yet, the determination is not satisfied and the routine returns to step S6. If the standby state is reached, the determination is satisfied, the routine proceeds to step S8, where the first directional control valves 131a, 131b are set to the neutral position, and the second and third directional control valves 138a, 138b, 142 are set.
A signal for setting a and b to the right position is output, and further, step S9
Then, the second and third pilot check valves 161a, 161a
And a pilot hydraulic pressure signal for closing 162a and 162a is output. As a result, the first hydraulic cylinder 68a,
The pressure on the bottom side and the pressure on the rod side of b become the same pressure, and the first hydraulic cylinders 68a, 68b stop at a predetermined standby state position, and the second and third hydraulic cylinders 207a, 207a, 207b.
And the pressure oil on the bottom side of 120a and 120a is in the closed state.
And third pilot check valves 161a, b and 16
Blocked by 2a, b, the second and second hydraulic cylinders 207a, b and 120a, b stop at a predetermined standby position. The second hydraulic cylinders 207a, 207b
The pressure oil is supplied to the bottom side of each of the third hydraulic cylinders 120a and b through the single throttle circuits 127a and b. This is to increase the accuracy of the stop position by lowering the rising speed of the lower horizontal roller and the moving speed of the split roller 27b. FIG. 8 shows the standby state before biting into the H-section steel 11 as described above.
Shown in.

As shown in FIG. 8, in this standby state, the vertical rollers 13a and 13b are respectively slightly smaller than the flange outer side surface of the H-section steel 11 (shown by an imaginary line) to be finely rolled. It is set so that a clear gap ΔA is interposed. At this time, a gap ΔB is set to intervene between the outer surfaces of the split rollers 27b, 27b of the upper and lower horizontal rollers and the inner surface of the H-shaped steel 11 flange. Further, at this time, the split roller 27 of the # 1 lower horizontal roller
Between the upper surface of a and b and the lower surface of the corrugated H-shaped steel 11,
The gap ΔC is set to intervene.

Returning to FIG. 7, when step S9 is completed, the procedure proceeds to step S10, in which the detection signal from the straightening material passage recognition sensor 69 is input, and it is determined whether or not the passage of the H-section steel 11 at the tip is detected in step S11. To do. If the H-section steel 11 has not been carried in yet, the determination is not satisfied, and the process returns to step S10. When the H-section steel 11 is carried in from the entry-side table 111, the correction material passage recognition sensor 69 detects the passage of the leading end thereof, so that this determination is satisfied, and the routine goes to Step S12.

In step S12, after the lapse of a predetermined time delay Δt1 from the detection of the passage of the leading edge, the first to third O
N / OFF switching valves 135a, 135b, 140, 144
A control signal for turning ON is output. Δt1 at this time
Is # 1 lower horizontal roller 27a, b, # 2 upper horizontal roller 2
The time is set to be sufficient for H-shaped steel 11 to be bitten into 7a and 7b and vertical rollers 13a and 13b. This allows
The first to third pressure control valves 132a, 132b, 139,
The pressure oil controlled to a predetermined pressure by 143 is the first to third hydraulic cylinders 68a, 68b, 207a, 207b, 120.
a, 120b flowing into the bottom side of the vertical rollers 13a,
b moves slightly forward in the axial direction of the horizontal roller, the # 1 lower horizontal rollers 27a and 27b move slightly upward, and the split roller 27b moves slightly in the direction away from the split roller 27a.
As a result, the vertical rollers 13a, b press the outside of the H-shaped steel 11 flange, and the split rollers 27a, b move to H.
The inside of the shaped steel 11 flange is pressed outward. At this time, the split rollers 27a and 27b are controlled so as to come into contact with the upper and lower corrugations of the H-shaped steel 11 but do not apply a pressing force. This state is shown in FIG. 9, and an enlarged view of the portion B is shown in FIG. As shown in FIGS. 9 and 10, the split roller 27
By the protruding portions 27aA and 27bA of a and b, a pressing force is applied only to the R portion 11A (the portion where the flange and the wave intersect at right angles) of the H-shaped steel 11 in such a pressed state to perform fine rolling. The residual stress of can be removed.

Returning to FIG. 7 again, when step S12 is completed, the process proceeds to step S13, in which a detection signal from the straightening material passage recognition sensor 69 is input and whether or not the tail end passage of the H-section steel 11 is detected in step S14. judge. If the fine rolling is still continuing, this determination is not satisfied, and the procedure S13 is performed.
Return to. When the fine rolling is completed and the H-shaped steel 11 is finished being carried in from the entry side table 111, the correction material passage recognition sensor 69 detects the passage of the tail end thereof, so that the determination is satisfied, and the routine goes to Step S15. In step S15, after a predetermined time delay Δt2 has elapsed since the trailing edge passage was detected, the first to third ON / OFF switching valves 135a, 135
A control signal for turning OFF b, 140, 144 is output. At this time, Δt2 is determined by the # 1 lower horizontal roller 27a,
b, # 2 upper horizontal rollers 27a, 27b, and vertical roller 13
It is set to a time just before the tail end of the H-shaped steel 11 passes through a and b. Then, the process proceeds to step S16, and the second and third
Pilot check valves 161a, b and 162a, b
Outputs a pilot oil pressure signal that opens the.

After that, the procedure proceeds to step S17, and the first to third directional control valves 131a, 131b, 138a, 138b,
A control signal for switching 142a and 142b to the right position in the drawing is output. As a result, the pressure oil flows into the rod side of the first hydraulic cylinders 68a and 68b, the first pilot check valves 160a and 160b are opened, and the pressure oil on the bottom side of the first hydraulic cylinders 68a and 68b is released. Tank T
And the vertical rollers 13a and 13b are retracted in the horizontal roller axial direction. In addition, the second hydraulic cylinders 207a, 207b
The pressure oil is quickly discharged from the bottom side through the second pilot check valves 161a, b in the open state and the single throttle circuits 127a, b, while the directional control valve 146 is provided on the rod side as described above. Since the pressure oil is always supplied through the second hydraulic cylinders 207a and 207a, the second hydraulic cylinders 207a and 207b move in the contracting direction, and the # 1 lower horizontal roller descends. Further, the pressure oil is quickly discharged from the bottom side of the third hydraulic cylinders 120a, b through the third pilot check valves 162a, b in the open state and the single throttle circuits 128a, 128b.
As described above, since the pressure oil is constantly supplied to the rod side through the direction switching valve 146, the third hydraulic cylinders 120a and 120b operate in the contracting direction, and the split roller 27b moves away from the split roller 27a. Move slightly to. afterwards,
Moving to step S18, each position sensor 130a, 130
b, 125a, 125b, 126a, 126b detected first to third hydraulic cylinders 68a, 68b, 20
7a, 207b, 120a, 120b are input, and in step S19, whether each roller has returned to the standby state (that is, whether the vertical roller 13 has retracted to a predetermined position,
Whether the # 1 lower horizontal roller has descended to a predetermined position or the split roller 27b has come close to a predetermined distance from the split roller 27a)
Determine whether If not yet returned to the standby state, the determination is not satisfied, and the process returns to step S18. If it returns to the standby state, the determination is satisfied, and the routine goes to Step S20,
A control signal for returning the first directional control valves 131a, 131b to the neutral position is output. Then, in step 21, the second
And third pilot check valves 161a, b and 16
A pilot hydraulic pressure signal for closing 2a and 2b is output. As a result, each roller returns to the standby state as shown in FIG. 8 and ends this flow.

In addition, the above procedure is performed by the vertical rollers 13a,
13b, the # 2 upper horizontal rollers 27a, b and the # 1 lower horizontal rollers 27a, b were only described for fine rolling, but after this fine rolling, as shown in FIG. #
The upper and lower horizontal rollers 9 correct warpage and bending by a known method, and the sheet is delivered by the delivery table 112. That is, the fine rolling by the vertical rollers 13a and 13b, the # 2 upper horizontal rollers 27a and b, and the # 1 lower horizontal rollers 27a and b impedes the normal straightening work by the # 3 to # 9 upper and lower horizontal rollers. Can be done without. Note that only # 1 and # 2 horizontal rollers are used for fine rolling,
The 3 to # 9 horizontal rollers may be used as mere carry-out rollers.

Further, in the above, the case where the fine rolling, or the fine rolling and the straightening are performed has been described, but in general, in the production facility for the shaped steel, in addition to the H-shaped steel, many other shaped steels (for example, angle steel) are used. Are manufactured and straightened by the same roller straightening machine. Roller straightener 46 according to the present embodiment
Has similar functions. FIG. 11 shows a front view of the straightening machine 46 when straightening the straightening material 11 that is not the H-section steel.

In FIG. 11, the point different from the case of FIG. 2 in which H-section steel 11 is finely rolled and straightened is that # 2 pitch moving device 10a, # 4 pitch moving device 10c, # 6, # 8 pitch moving device 10c. , # 1, # 3 pitch moving device 3a, #
The # 7, # 9 pitch moving device 3b causes # 2, # 4, #
6, # 8 upper roller and bearing structure 4, and # 1, # 3
The positions of the # 7 and # 9 lower rollers and the bearing structure 5 in the pass direction are adjusted, and the upper and lower positions are arranged alternately as shown in the drawing. As a result, the # 1 lower roller / bearing structure 5 and the # 2 upper roller / bearing structure 4 are at different positions in the pass direction. Also,
The split rollers 27a, 27b can be replaced with those corresponding to the shape of the straightening member 11. At this time, the vertical roller 13 for fine rolling moves together with the # 2 upper horizontal roller.
By operating the hydraulic cylinders 68a and 68b to move the chocks 67a and b back to a position (for example, the maximum open position) that does not interfere with the passage of the correction material 11, the same correction as in the conventional case can be performed. Further, in this case, the # 0 lower horizontal roller functions simply as a carrying roller (without correction).

According to the present embodiment configured as described above, the following operational effects are exhibited. The split rollers 27a and 27b constituting the # 1 lower horizontal roller and the # 2 upper horizontal roller are configured to be expandable / contractible in the roller axial direction, and the vertical rollers 13a and 13b are movable in the horizontal roller axial direction. It is configured. As a result, the H-shaped steel 11 flange is sandwiched between the lower side surface of the # 2 upper horizontal roller 27a and b, the upper side surface of the # 1 lower horizontal roller and the vertical roller 13a and b, and the H-shaped steel 11 corrugated and the flange are formed. It is possible to apply the rolling load only to the corner R portion 11A with which each other sticks. And the magnitude of the rolling load at this time is as follows:
Hydraulic cylinders 68a, 68b, 120a, 120b
By controlling the pressure oil pressure to the R value to a predetermined value.
It can be appropriately adjusted so that the rolling reaction force of 1 A does not act in the width direction of the wave. On the other hand, at this time, since the # 1 lower horizontal rollers 27a and 27b are configured to be vertically movable on the roller shaft, the distance between the # 2 upper horizontal roller and the # 1 lower horizontal roller can be adjusted. Therefore, the # 2 upper horizontal roller and the # 1 lower horizontal roller can be brought into contact with the wave while preventing the bending force from acting on the wave and the flange portion. In addition, since the upper and lower horizontal rollers 27a and 27b are both-sided type, the vertical rigidity of the straightening machine 46 is increased, the bending itself due to the straightening load is reduced, and even slight displacement of bending can be caused by the horizontal roller. Since it becomes bilaterally symmetric about the axial direction, it is possible to easily perform accurate pressing without adjusting the angles of the vertical rollers 13a and 13b.

Therefore, since only the flange of the H-section steel 11 and the corner R portion 11A of the wave can be finely rolled by an optimum load, the residual stress of the R portion 11A is removed and the generation of cracks is prevented. The H-section steel 11 with high accuracy and high quality can be manufactured.

Further, in response to the detection signal from the straightening material passage recognition sensor 69, the control device 200 turns the first to third ON.
By switching the OFF switching valves 135a, 135b, 140, 144 to start and end the fine rolling, the vertical rollers 13a, b, the # 1 lower horizontal rollers 27a, b, and the # 2 upper horizontal rollers 27a, b are H-shaped steel. It is possible to reliably prevent an accident in which the roller is pressed without 11 and comes into contact with or damages another roller. Then, since fine rolling can be started and ended without stopping the straightening material, there is also an effect that smooth work and high efficiency can be achieved.

Further, the first to third hydraulic cylinders 68
a, 68b, 207a, 207b, 120a, 120b
Bottom side, that is, the accumulators 134a, 134b, 141a, 141b, 145 connected to the pipelines on the pressing side.
Since the a, 145b and the relief valves 133a, 133b are provided, the position setting error of the vertical rollers 13a, b (such as setting each roller standby state position to a size smaller than each part size of the H-shaped steel 11), Hydraulic cylinders 68a, 68b, 207 due to transport trouble of H-section steel 11
High pressure from a, 207b, 120a, 120b can be released to prevent excessive pressurization and protect the machine.

[0080]

EFFECTS OF THE INVENTION According to the present invention, only the flange of H-section steel and the corner R of the wave can be finely rolled with an optimum load, so that the residual stress in the R is removed and the occurrence of cracks is prevented. Therefore, it is possible to manufacture H-section steel with high precision and high quality.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a hydraulic circuit that supplies pressure oil to a hydraulic cylinder provided in a straightening machine according to the present embodiment.

FIG. 2 is a front view showing the overall structure of a large roller straightening machine.

FIG. 3 is a side sectional view showing a structure of a # 2 upper roller and a bearing structure.

FIG. 4 is a view showing the detailed structure of the connection between the bearing case and the chock as seen from the line EE in FIG.

FIG. 5 is a side sectional view showing a structure of # 4, # 6, # 8 upper rollers and a bearing structure.

FIG. 6 is a diagram showing a control relationship between each pressure control valve, an ON / OFF switching valve, a pressure control valve and a control device.

FIG. 7 is a flowchart showing a control procedure by the control device.

FIG. 8 is a diagram showing a standby state before the straightening material is caught.

FIG. 9 is a diagram showing a fine rolling state.

FIG. 10 is an enlarged view of a part B in FIG.

FIG. 11 is a front view of a straightening machine when straightening a straightening material that is not an H-section steel.

[Explanation of symbols]

4 Upper roller and bearing assembly 5 Lower roller and bearing assembly 7 Upper roller support 8 Lower roller and bearing assembly lifting device 9 Lower roller support 11 H-section steel 13a, b Vertical roller 27a, b Split roller (upper・ Lower horizontal roller) 30 Operation side roller sleeve (outer sleeve) 31 Drive side roller sleeve (inner sleeve) 46 Roller straightening machine 67a, b Chock 67aA Engaging portion (slider portion) 68a, b First hydraulic cylinder 69 Straightening material Passage recognition sensor (second detection means) 113a, b Bearing case (bearing box) 113aA Grooves 120a, b Third hydraulic cylinder 125a, b Position sensor (first detection means) 126a, b Position sensor (first Detection means) 130a, b Position sensor (first detection means) 131a, b First direction switching valve 132a , B First pressure control valve 135a, b First ON / OFF switching valve 138a, b Second directional switching valve 139 Second pressure control valve 140 Second ON / OFF switching valve 142ab Third directional control Valve 143 Third pressure control valve 144 Third ON / OFF switching valve 200 Control device (first to third control means) 207a, b Second hydraulic cylinder

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Komatsubara 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Steel Pipe Co., Ltd. (72) Inventor Shogo Tomita 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nippon Steel Pipe Incorporated (72) Inventor Makoto Watanabe 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Within Nihon Kokan Co., Ltd. (56) Reference JP-A-6-179018 (JP, A) JP-A-8-141641 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21D 3/05

Claims (6)

(57) [Claims] 1. A roller straightening machine for straightening an H-section steel, comprising a pair of upper and lower horizontal rollers which can be arranged at the same position in the path direction of the H-section steel, and contact the outer surface of a flange of the H-section steel, The central axis is above
Yes a pair of vertical rollers located in a vertical plane including the center axis of the lower pair of horizontal rollers, the chocks for rotatably supporting the vertical roller
And, each of the upper horizontal roller and a lower horizontal roller, while being composed of two split rollers telescopically disposed apart from each other in the axial direction of the roller, doubly supported to be pivotally supported at both ends of the roller shaft The lower horizontal roller is vertically movable in a vertical direction, and the chock is the lower end of the bearing box at both ends of the upper horizontal roller.
The upper horizontal roller is slid in the axial direction with respect to the groove provided nearby.
It is equipped with a slider that engages in an idable manner.
Roller straightening machine to collect. 2. The roller straightening machine according to claim 1 , wherein a first hydraulic cylinder is fixed to the bearing boxes at both ends of the upper horizontal roller to move the chock forward and backward, and from the hydraulic source to the first hydraulic cylinder. A first pressure control valve for controlling the pressure of the supplied pressure oil, and a first ON / OFF capable of connecting / disconnecting a pipe line connecting the first pressure control valve and the first hydraulic cylinder. A switching valve and a first direction switching provided in a pipeline for supplying pressure oil from the hydraulic pressure source to the first hydraulic cylinder without going through the first pressure control valve and the first ON / OFF switching valve. A roller straightening machine further comprising a valve and first control means for controlling operations of the first pressure control valve and the first directional control valve. 3. A roller straightening machine for straightening H- section steel, comprising a pair of upper and lower parts which can be arranged at the same position in the path direction of the H-section steel.
The horizontal roller comes into contact with the outer surface of the H-section steel flange, and the central axis
Located in the vertical plane including the central axes of the lower pair of horizontal rollers
Vertically move the pair of vertical rollers and the bearings at both ends of the lower horizontal roller vertically.
Second hydraulic cylinder and pressure oil supplied from the hydraulic source to the second hydraulic cylinder
A second pressure control valve for controlling the pressure of, and the second pressure control valve and the second hydraulic cylinder.
A second ON / OFF switch that can connect and disconnect the connected pipeline
A switching valve, and the second pressure control valve and the second ON / OFF switch from the hydraulic pressure source.
Pressure oil is supplied to the second hydraulic cylinder without passing through the OFF switching valve.
Of a second directional switching valve provided in a pipe line for supplying a gas, and the operation of the second pressure control valve and the second directional switching valve
A second control means for controlling each of the upper horizontal roller and the lower horizontal roller.
The two intervals are arranged so that they can be expanded and contracted in the roller axis direction.
It is composed of rollers and supports both ends of the roller shaft.
And a pair of vertical rollers, wherein the pair of vertical rollers are in the axial direction of the horizontal rollers.
A roller characterized in that it is movable in any direction.
Straightening machine. 4. The roller straightening machine according to claim 2 or 3 , further comprising first detecting means for outputting a detection signal corresponding to a stroke amount of the corresponding first or second hydraulic cylinder, and The first or second control means switches the corresponding first or second directional control valve according to a detection signal from the first detection means. 5. In a roller straightening machine for straightening H-section steel, Make sure that the distance between them is
One for inner sleeve and one for outer sleeve
Of two H-shaped steels
A pair of top and bottom horizontal rows that can be placed at the same position in the path direction
La, It contacts the outer surface of the H-section steel flange, and the central axis
Located in the vertical plane including the central axes of the lower pair of horizontal rollers
A pair of vertical rollers, The inner sleeve is in a horizontal roller axial direction with respect to the outer sleeve.
A third hydraulic cylinder that can move forward and backward, Pressure oil supplied from a hydraulic source to this third hydraulic cylinder
A third pressure control valve for controlling the pressure of This third pressure control valve and the third hydraulic cylinder
A third ON / OFF switch that can connect and disconnect the connected pipeline
Exchange valve, From the hydraulic pressure source, the third pressure control valve and the third ON
Pressure oil is supplied to the third hydraulic cylinder without passing through the OFF switching valve.
A third directional control valve provided in a pipeline for supplying Operation of the third pressure control valve and the third directional control valve
Third control means for controlling Detection according to the stroke amount of the third hydraulic cylinder
First detection means for outputting a signal, On the upstream side of the upper and lower horizontal roller paths, H-shaped steel
A second detection means capable of detecting an excess, Each of the upper horizontal roller and the lower horizontal roller is
It is a double-sided structure in which both ends of the roller shaft are supported. The lower horizontal roller can move the roller shaft up and down in the vertical direction.
And the pair of vertical rollers are
It is configured so that it can move in the roller axis direction of the roller.
The third control means is the detection signal from the first detection means.
No. The directional control valve of No. 3 is switched and the second detection is performed.
According to the detection signal from the means, the third ON / OFF
A roller straightening machine characterized by switching a switching valve. 6. The roller straightening machine according to claim 2 or 3 , further comprising second detecting means capable of detecting passage of the H-section steel on the upstream side of the paths of the upper and lower horizontal rollers.
The first or second control means is responsive to the detection signal from the second detection means and corresponds to the first or second ON / OFF.
A roller straightening machine characterized by switching the OFF switching valve.