JPH10258318A - Roller straightener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a vertical-roller supporting device and to obviate a vertical-roller moving device and angle adjusting mechanism by making the shaft of the straightening roller into both end supporting type and also connecting the vertical-roller supporting device to two those bearing mechanisms. SOLUTION: In a roller straightener for executing straightening while preventing the inclination of the flanges of the wide flange shape 11 which has an upper roller and bearing component which are provided with horizontal rollers which are alternately arranged up and down along the longitudinal direction of the wide flange shape and vertical rollers 13a, 13b which are brought into contact with the outside surfaces of the wide flange shape and whose center axes are respectively located on a plane including a center axis of each horizontal roller, the shaft of each horizontal roller is respectively supported at both ends with bearing boxes 113a, 113b and two chocks 67a, 67b for rotatably supporting each pair of vertical rollers 13a, 13b are respectively connected to two bearing boxes 113a, 113b in both end parts of corresponding horizontal rollers 27a, 27b.

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 correcting the shape of an H-section steel such as warpage and squareness, and more particularly to a roller straightening machine having a vertical roller.

[0002]

2. Description of the Related Art Generally, a rolled H-section steel is hot-formed by a universal mill and then cooled. At this time,
A difference in cross-sectional temperature occurs due to the difference in thickness in the cross-section and the difference in the overall cooling process, and as a result, warpage, bending, and falling of the flange occur. The warpage or bending generated in this manner can be corrected by a correction roller of a roller correction machine. On the other hand, it is difficult to correct the inclination of the flange with a normal straightener having no vertical roller. Also, for example, the correction of warpage or bending of the H-section steel is performed by repeatedly bending and deforming the wave. However, depending on the level of the correction load of the wave, the flange can be easily collapsed, so that a sufficient correction load is required. May not work. In such a case, an off-line press straightening has been necessary, which is extremely inefficient.

In order to cope with such a problem, for example, Japanese Patent Publication No. 8-29349, 29350 and
As described in JP-A-59124, a straightening machine has been proposed which corrects the perpendicularity of a flange by attaching a vertical roller or the like to prevent the flange from falling or bending.

[0004]

However, the above-mentioned conventional straightening machine has the following problems. That is, since the shaft of the straightening roller for performing the straightening is of a cantilever type supported by one bearing mechanism on one side, a supporting device (for example, a frame) for supporting the vertical roller for correcting the perpendicularity is provided separately from the bearing mechanism. Placed as a stand. This allows
This vertical roller support becomes very large and is structurally difficult to implement. In addition, since this type of general roller straightening machine is a variable pitch type in which the roller pitch is changed according to the size of the straightening material, it is necessary to move the vertical roller following the pitch movement of the straightening roller. It is necessary to install the device separately. Further, since the bearing mechanism of the straightening roller is a cantilever type, the inclination of the straightening roller shaft is large due to the clearance of the bearing support device and the bending due to the straightening load, and the amount of the tilt changes depending on the magnitude of the load, so that the vertical roller Is supported by a separate supporting device, an angle adjusting mechanism for inclining the vertical roller in accordance with the inclination of the correction roller shaft is required. Above 8-2-934
In the straightening machine described in Japanese Patent No. 9,29350, although a hydraulic cylinder for tilting a choke for supporting a vertical roller is provided, it is actually difficult to realize the structure in terms of structure. Further, in the straightening machine described in JP-A-4-59124, such an angle adjusting mechanism is not provided.
Further, regarding the pressing of the vertical roller at the time of straightening,
If the pressing force control is not performed precisely, over-pressing of the flange and uncorrection tend to occur, but Japanese Patent Publication Nos. 8-29349, 29350
In the straightening machine described in Japanese Patent Application Publication No. H06-27138, since the vertical roller is moved forward and backward by the electric motor driven pressure reduction device,
It is difficult to prevent this overpressure or uncorrected.

A first object of the present invention is to reduce the size of the vertical roller supporting device by making the straightening roller shaft a double-supporting type and connecting a vertical roller supporting device to its two bearing mechanisms. Another object of the present invention is to provide a straightening machine which can eliminate the need for a vertical roller moving device and an angle adjusting mechanism. A second object of the present invention is to provide a straightening machine having a vertical roller, in which the pressing load of the vertical roller is controlled to a high degree, thereby preventing over-pressure and uncorrection.

[0006]

In order to achieve the first object, according to the present invention, there are provided a plurality of horizontal rollers alternately arranged up and down along the longitudinal direction of an H-section steel, H
In a roller straightening machine that has a plurality of pairs of vertical rollers that contact the outer surface of the flange of the section steel and performs straightening while preventing the flange of the H-section steel from falling, the shaft of each horizontal roller has a bearing box at each end. The roller straightener is characterized in that two chocks supported rotatably and rotatably supporting each pair of vertical rollers are respectively connected to two bearing boxes at both ends of a corresponding horizontal roller. Is done. That is, even if the horizontal roller side flange is inclined inward and the opposite roller side is inclined outward during H-section straightening, this is prevented by the pressing force on the flange of the vertical roller. At this time, by connecting two chocks, which are vertical roller supporting means, to both end bearing boxes of a double-supported horizontal roller shaft, the vertical roller supporting means is compared with a cantilever type structure in which the vertical roller supporting means is separately provided. Can be reduced in size. Further, even when the roller pitch of the horizontal rollers is changed, the horizontal rollers follow the pitch movement of the horizontal rollers and move together, so that there is no need to provide a vertical roller moving device or the like. Furthermore, by being a double-supported type, the vertical rigidity of the straightening machine is increased, the deflection itself due to the straightening load is reduced, and the slightly possible deflection displacement is also symmetrical with respect to the horizontal roller axis direction. Even if the angle of the vertical roller is not adjusted, the straightening material is straightened without tilting.

Preferably, in the roller straightening machine,
A roller straightening machine is provided, wherein each of the two chocks is provided with a slider portion which is slidably engaged in a horizontal roller axial direction in a groove provided near a lower end of a corresponding bearing box. You.

More preferably, in order to achieve the second object, in the roller straightening machine, a hydraulic cylinder fixed to each bearing box for moving the corresponding chock forward and backward, and supplied from a hydraulic oil source to each hydraulic cylinder Pressure control valve for controlling the pressure of the pressurized oil to be supplied, and ON capable of communicating and shutting off a pipeline connecting the pressure control valve and the hydraulic cylinder.
An OFF switching valve, a direction switching valve for switching the direction of pressure oil supplied from the pressure oil source to each hydraulic cylinder without passing through the pressure control valve and the ON / OFF switching valve, the pressure control valve and the direction switching Control means for controlling the operation of the valve. Accordingly, if the ON / OFF switching valve is set to the communication position, the pressure oil controlled to the predetermined pressure by the pressure control valve can be supplied to the hydraulic cylinder, and the pressing force can be freely controlled according to the size of the correction material. Therefore, it is possible to press the outer surface of the flange with a predetermined pressing load corresponding to the H-section steel with high accuracy, quickly and reliably. Therefore, overpressure and uncorrected state can be prevented. Further, the pressing force applied to the flange acts as a compressive force in the width direction of the wave, but by appropriately controlling the pressing force by the pressure control valve, there is also an effect of preventing the deformation of the wave. . Further, by switching the direction switching valve, the forward / backward direction of the hydraulic cylinder can be freely controlled.

[0009] More preferably, the roller straightening machine further comprises first detecting means for outputting a detection signal corresponding to the stroke amount of the hydraulic cylinder, and the control means comprises: Depending on the detection signal,
A roller straightening machine is provided, wherein the direction switching valve is switched. As a result, the position of the vertical roller in the horizontal roller axis direction can be detected. For example, at the time of starting correction, the direction switch valve is switched while maintaining the ON / OFF switch valve at the neutral position to move the vertical roller toward the H-shaped steel flange. By moving the directional control valve to the neutral position when the vertical roller reaches a position having a small gap with respect to the outer dimensions of the H-shaped steel to be straightened, the vertical roller can be brought into a standby state.

[0010] Preferably, the roller straightening machine further comprises a second detecting means capable of detecting passage of an H-shaped steel upstream of at least one of the plurality of horizontal rollers, and the control means comprises: A roller straightening machine is provided, wherein the ON / OFF switching valve is switched in accordance with a detection signal from the second detecting means.
Thus, at the start of straightening, the ON / OFF switching valve is first held at the neutral position, and the ON / O switching valve is turned ON / OFF a predetermined time after the second detecting means detects that the tip of the H-section has passed.
If the FF switching valve is configured to switch to the communication position,
At least one horizontal roller on the downstream side of the path of the detection means starts pressing without the H-shaped steel, and can reliably prevent the horizontal roller from contacting or being damaged. Also, at the end of the correction,
If the ON / OFF switching valve is switched to the shut-off position a predetermined time after the second detecting means detects that the tail end of the H-shaped steel has passed, at least one of the detecting means on the downstream side of the path of the detecting means is provided. It is possible to reliably prevent the horizontal roller from continuing to be pressed without the H-section steel, and to prevent the horizontal roller from contacting and being damaged. Further, pressing start and pressing end can be performed smoothly without stopping the correction material.

[0011]

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 roller straightening machine according to the present embodiment. In FIG. 2, the straightening machine main body 46 includes an elevating device 2 that elevates and lowers the frame 1, and includes an upper roller and bearing component 4, an upper roller support 7, a lower roller and bearing component 5, As shown in the figure, a lower roller support 9 provided with an elevating device 8 for the roller and bearing structure 5 is arranged alternately up and down along the longitudinal direction of a straightening member (for example, an H-section steel) 11.

That is, the upper roller / bearing structure 4 and the upper roller support 7 are located at positions # 2, # 4, #
6 and # 8, and the lower roller and bearing structure 5 and the lower roller support 9 are located in the path direction position #.
1, # 3, # 5, # 7, and # 9.

The elevating device 2 positions the upper roller and the bearing assembly 4 with respect to the transport table according to the size of the H-section steel 11.

The lower roller and the bearing structure 5 are respectively # 1, # 3, # 5, # 7, #
9 is provided with horizontal rollers (detailed structure will be described later), and the elevating device 8 raises and lowers these lower rollers and the bearing structure 5,
A bending force is applied to the straightening material. And the lower roller support 9
Incorporates this elevating device 8, and can be moved for each roller. Each of the upper roller and the bearing structure 4 is # 2, # 4, # 6 according to the position in the path direction.
A # 8 horizontal roller (detailed structure will be described later) is provided, and the upper roller support 7 incorporates the upper roller and the bearing structure 4. Note that the bearing box of each upper and lower horizontal roller is provided with a vertical roller 13 which is in contact with the outer surface of the flange of the H-section steel 11 and whose central axis is located in the plane including the central axis of the corresponding horizontal roller. Thus, the straightening is performed while preventing the flange of the H-shaped steel 11 from falling down (details will be described later).

The support structure for the roller shafts of the upper roller and the bearing structure 4 and the lower roller and the bearing structure 5 is of a double-supporting type. Steel straightening and high-precision straightening can be performed efficiently. Further, a horizontal roller (described later) of the upper roller and the bearing structure 4 is driven via a spindle coupling 141 (described later) by a driving device (not shown) having a motor and a speed reducer.

The straightening machine 46 moves the # 1 and # 3 lower roller supports 9 and the # 7 and # 9 lower roller supports 9 in the path direction using a screw nut system.
3 pitch moving device 3a and # 7, # 9 pitch moving device 3
b, whereby each lower roller support 9
Can be moved in the path direction. Similarly, the straightening machine 46 also has # 2, # 4 upper roller supports 7, and #
# 2, # 4 pitch moving device 1 for moving upper roller support 7 in the pass direction by screw nut method
0a and # 6, # 8 pitch moving device 10b, whereby each upper roller support 7 can move in the path direction. With such a configuration, the upper and lower roller supports 7 and 9 are provided with a type of straightening member,
An optimum roller pitch is formed according to specifications and the like. That is, the roller pitch is adjusted according to the shape steel.

The straightening machine 46 further includes a straightening material passage recognition sensor 69a as a second detecting means capable of detecting the passage of the H-section steel 11 on the upstream side of the # 1 horizontal roller, and #
And a straightening member passage recognition sensor 69b capable of detecting passage of the H-section steel 11 on the upstream side of the path of the six horizontal rollers.

In the above configuration, the H-shaped steel 11 rolled and cooled by the rolling equipment (not shown) on the upstream side of the pass is carried in at the entry side table 111, and the carried straightening material H-shaped steel 11 is carried in. In the state where the flange portion is pressed from the outside by the vertical roller 13 provided in the bearing box of the # 1 to # 9 horizontal rollers, the warpage and bending are corrected by the # 1 to # 9 horizontal rollers. It is carried out by the table 112.

Here, the # 2, # 4, # 6, # 8 upper roller and bearing structure 4 will be described in detail with reference to FIG. The main body 4 mainly includes an operation side bearing unit A, a roller / sleeve assembly unit B, and a drive side bearing unit C (see FIG. 1), and these are configured to be separable. Hereinafter, 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. 1 is a side sectional view showing the structure of the # 2 upper roller and the bearing structure 4. In FIG. 1, an operation side bearing unit A is provided on an operation side bearing case (bearing box) 13a to which wheels 14a are mounted, a bearing 15a, and an inner ring 16 of the bearing 15a, and a rotating ring 17 having a gear 17a formed on the outer periphery. , This rotating ring 17
A grooved screw ring 18 having an internal thread and a gear 18a formed on the outer circumference thereof, a moving body case 19 having a groove 20 as a moving mechanism of the roller and sleeve assembly unit B on the inner circumference side, a worm gear 21, Worm gear 21
A slider 22, a thrust bearing 23, a thrust bearing 23, an inner slide ring 24 having a gear 24a formed on the rotation protrusion, an inner screw engaged with the inner slide ring 24, and a gear 25a formed on the outer periphery. Slide screw ring 25, sensor 2 for checking travel distance
6 and so on. Also, the operation side bearing case 113
A is provided with a motor 65 which rotates the worm 66 and constitutes a wheeler nut type moving device.

A choke 6 for rotatably supporting the vertical roller 13a is provided below the bearing case 113a.
7a is connected. FIG. 1 showing the detailed structure of this connection
FIG. 3 is a view as viewed from the middle line II. As shown in FIG. 3, the chock 67a is a bearing case 1
A substantially protruding engaging portion 67aA is provided to be slidably engaged with a groove 113aA provided near the lower end of 13a in the axial direction of the horizontal roller. Then, returning to FIG.
7a is advanced and retracted in the horizontal roller axial direction by a hydraulic cylinder 68a fixed to the bearing case 113a, and is also provided with a pressing force on the H-section steel. A hydraulic circuit for supplying pressure oil to the hydraulic cylinder 68a will be described later.

(2) Roller / Sleeve Assembling Unit B In FIG. 1, the roller / sleeve assembling unit B is composed of a split roller 27a, a telescopic screw ring 28a, a stopper ring 29a, and an operating roller roller (outer sleeve) 30. A split roller 2 which forms a horizontal roller together with the sleeve assembly unit B1 and the split roller 27a
7b, telescopic screw ring 28b, stopper ring 29
b, spacer 180, and two roller-sleeve assembly units B1, B2 of drive-side roller-sleeve assembly unit B2 composed of drive-side roller sleeve 31 (inner sleeve)
It consists of. The split rollers 27a and 27b
Constitute one horizontal roller. The roller sleeve 30 of the operation-side roller / sleeve assembly unit B1 is engaged with the roller sleeve 31 of the drive-side roller / sleeve assembly unit B2 to form a set of roller / sleeve assembly units B. This operation side roller sleeve 3
0 and the drive-side roller sleeve 31 are fitted 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
This is done via a key (not shown) so that it can be transmitted to zero. The operation side roller / sleeve assembly unit B1
The roller sleeve 30 is detachably connected to the grooved screw ring 18 and is connected to the drive-side roller / sleeve assembly unit B.
The roller sleeve 31 of the inner slide ring 2
4 is removably connected to.

(3) Drive-side bearing unit C In FIG. 1, the drive-side bearing unit C is a wheel 14b.
And a shaft 32 positioned on the bearing case 113b via the bearing 15b.

One of the shafts 32 is a roller sleeve 3
1. The inner slide ring 24 fits, and the other fits into the spindle coupling 141. The shaft 32 and the roller sleeve 31 are fitted 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. Is being done. Also, like the operation side unit A, the bearing case 113
A choke 67b that rotatably supports the vertical roller 13b is connected to a lower portion of b. The chock 67b, like the chock 67a of the operation side unit A, has a substantially protrusion-like engagement that slidably engages in a groove (not shown) provided near the lower end of the bearing case 113b in the horizontal roller axis direction. The hydraulic cylinder 68b fixed to the bearing case 113b allows the hydraulic cylinder 68b to advance and retreat in the horizontal roller axial direction and to apply a pressing force to the H-section steel. A hydraulic circuit for supplying pressure oil to the hydraulic cylinder 68b will be described later.

In the case of a section steel having a size that can share the split rollers 27a and 27b, the outer width L of the split rollers 27a and 27b is set to an arbitrary value. That is, first, FIG.
5, the worm gear 21 is rotated in the circumferential direction of the roller by the motor 65 via the worm 66. Here, a screw 22 a is cut on the outer surface of the slider 22, and the screw 22 a of the slider 22 is screw-engaged with the inner surface of the worm gear 21. At this time, since the slider 22 is locked by engaging the key 22b provided at the tip of the slider 22 with the axial groove 20 formed on the inner peripheral surface of the moving body case 19, the worm gear 2
By one rotation, the slider 22 slides in the axial direction inside the moving body case 19. And the slider 22
Simultaneously with the axial movement, the inner slide ring 24 connected to the slider 22 and the drive-side roller sleeve 31 connected thereto slide on the shaft 32. Here, 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, and the outer width L of the split rollers 27a and 27b can be easily adjusted. can do. At this time, the driving side split roller 27b
It is desirable that the sensor 26 detects the moving amount of the split roller 27b with respect to the position setting.

The # 2 upper roller and bearing structure 4 has been described above, but the # 4, # 6, and # 8 upper roller and bearing structure 4 have the same configuration. Also, the # 1, # 3, # 5, # 7, # 9 lower roller and bearing structure 5 are configured similarly to the upper roller and bearing structure 4 except that the bearing case is upside down. ing.

Next, a circuit diagram of a hydraulic circuit for supplying pressure oil to the hydraulic cylinders 68a and 68b is shown in FIG. The hydraulic circuit shown in FIG. 4 includes hydraulic cylinders 68a and 68b and pressures for controlling the pressure of hydraulic oil supplied to hydraulic cylinders 68a and 68b from hydraulic pumps (shown as P in the figure) as pressure oil sources, respectively. The control valves 132a and 132b and the pressure control valve 13
ON / OFF switching valves 135a, b capable of communicating and shutting off the pipeline connecting the hydraulic cylinders 2a, 2b and the hydraulic cylinders 68a, b.
And the pressure control valves 132a, b and ON from the hydraulic pump P
・ Hydraulic cylinder 6 without going through OFF switching valves 135a and 135b
8a, 8b, direction switching valves 131a, b for switching the direction of the pressure oil supplied thereto, ON / OFF switching valves 135a, b, direction switching valves 131a, b, and hydraulic cylinders 68a, b
Circuit protection accumulators 134a, 134b and relief valve 13 provided branching from a pipeline between
3a and 3b. Further, in the hydraulic cylinders 68a and 68b, there are provided position sensors 130a and 130b as first detecting means for outputting a detection signal corresponding to the stroke amount.

In the above configuration, the pressure control valve 132a,
b, the operation of the ON / OFF switching valves 132a, b and the direction switching valves 131a, b is controlled by the control device 200 as control means.
Is controlled by This is shown in FIG. That is,
In FIG. 5, the control device 200 receives detection signals from the correction material passage recognition sensors 69a and 69b and the position sensors 130a and 130b, and in response to this, receives pressure control valves 132a and 132a.
b, controls the operation of the ON / OFF switching valves 135a, b and the direction switching valves 131a, b. Hereinafter, a correction operation procedure in the correction machine having the above-described configuration will be described with reference to FIG.

First, in advance, the controller 200 includes the stroke amounts of the hydraulic cylinders 68a and 68b corresponding to the standby positions (described later) corresponding to the shape of the straightening material (for example, H-shaped steel) 11 and the H-shaped steel 11. The optimum pressing force of the hydraulic cylinders 68a and 68b according to the physical properties of the material to be processed is stored. First, in step S1, the ON / OFF switching valve 13
Control signals are output to the ON / OFF switching valve 13
5a and 5b to the shut-off position, and the directional control valve 135
A control signal is output to a and b to switch the direction switching valves 135a and 135b to the neutral position.

Next, in step S, the operator inputs a material number representing the type of the H-section steel 11 input by input means (not shown). After that, the procedure goes to step S3 where the pressure control valve 132
control signals are output to the hydraulic cylinders 68a and 68b from the pressure control valves 132a and 132b.
Controlled to 1. Thereby, the pressure control valves 132a, 132b
To the ON / OFF switching valves 135a and 135b are maintained at the pressure P1. Next, in step S4, a control signal is output to the direction switching valves 135a and 135b, and the direction switching valve 135 is output.
a and b are switched to the left positions in the figure. As a result, pressure oil is supplied to the bottom side of the hydraulic cylinders 68a, 68b, and the vertical rollers 13a, 13b advance toward the inside. Then, in step S5, the strokes of the hydraulic cylinders 68a, b detected by the position sensors 130a, 130b are input, and in step S6, it is determined whether the vertical roller 13 has moved to a standby position corresponding to the shape of the H-section steel 11. judge. If the vertical rollers 13a and 13b have not yet reached the standby position, the determination is not satisfied and the procedure returns to step S4. If the vertical rollers 13a and 13b have reached the standby position, the determination is satisfied, and the routine goes to step S7, where a control signal for returning the direction switching valves 135a and 135b to the neutral position is output. FIG. 7 shows the standby position of the vertical rollers 13a and 13b before the H-shaped steel 11 bites. As shown in FIG. 7, in this standby position, the vertical rollers 13a and 13b are in the H-section 1 to be straightened.
1 (shown by imaginary lines) is set such that a minute gap ΔB is interposed therebetween.
At this time, a clearance ΔA is set between the outer surfaces of the horizontal rollers 27a and 27b and the inner surface of the H-section steel 11 flange.

Returning to FIG. 6, when step S7 is completed, the process proceeds to step S8, where a detection signal from the straightening material passage recognition sensor 69a is input, and it is determined whether or not passage of the tip of the H-section steel 11 is detected in step S9. I do. If the H-section steel 11 has not been loaded, the determination is not satisfied, and the procedure returns to step S8. When the H-section steel 11 is carried in from the entry side table 111, the passage of the leading end is detected by the straightening material passage recognition sensor 69a, so that this determination is satisfied, and the routine proceeds to step S10.

In step S10, the ON / OFF switching valve 135 corresponding to the # 1 to # 4 vertical rollers 13a and 13b after a lapse of a predetermined time delay Δt1 from the detection of the passage of the leading end.
A control signal for turning on a and b is output. Δ at this time
t1 is set to a time sufficient for the H-section steel 11 to bite into the # 4 horizontal rollers 27a and 27b. Thereby, the pressure oil controlled to the predetermined pressure by the pressure control valves 132a, 132b is # 1.
Flow into the bottom side of the hydraulic cylinders 68a, b corresponding to the # 1 vertical rollers 13a, b, and the # 1 to # 4 vertical rollers 13a, b move slightly forward in the horizontal roller axis direction to press the H-shaped steel 11. . This state is shown in FIG.

Returning to FIG. 6, when the procedure S10 is completed, the procedure proceeds to the procedure S11, where a detection signal from the correction material passage recognition sensor 69b is inputted, and it is determined whether or not the tip of the H-shaped steel 11 has been detected in the procedure S12. I do. If the H-section steel 11 has not passed yet, the determination is not satisfied, and the procedure returns to step S11. When the passage of the tip of the H-section steel 11 is detected, the determination is satisfied, and the routine goes to step S13. After a predetermined time delay Δt2 has elapsed from the detection of the passage of the tip, corresponding to the # 5 to # 9 vertical rollers 13a, b. ON / OFF switching valve 135 to be ON
Output a control signal. At this time, Δt2 is # 9
The time is set to a time sufficient for the H-section steel 11 to bite into the horizontal rollers 27a and 27b. Thus, similarly to # 1 to # 4, the pressure oil controlled to the predetermined pressure by the pressure control valves 132a and 132b is supplied to the hydraulic cylinders 6 of the # 5 to # 9 vertical rollers 13a and 13b.
8a and 8b flow into the bottom side, and # 5 to # 9 vertical rollers 1
3a and 3b are H-shaped steel members 1 that are slightly advanced in the horizontal roller axial direction.
Press 1. The straightening of the H-section steel 11 is performed as described above.

Then, the process proceeds to step S14, where the detection signal from the correction material passage recognition sensor 69a is input, and the process proceeds to step S15.
It is determined whether or not the passage of the tail end of the H-section steel 11 is detected. If the correction is still ongoing, this determination is not satisfied, and the process returns to step S14. When the straightening is completed and the carry-in of the H-shaped steel 11 from the entry side table 111 is completed, the passage of the tail end is detected by the straightening material passage recognition sensor 69a, so that this determination is satisfied, and the routine proceeds to step S16. In step S16, after a predetermined time delay Δt3 has elapsed from the detection of the passage of the tail end, the vertical rollers 13
The ON / OFF switching valves 135a and 135b corresponding to a and b
A control signal to make the FF is output. At this time, Δt3 is
It is set so that the tail end of the H-section steel 11 passes just past the # 4 horizontal rollers 27a and 27b. Then, the procedure S1
Then, a control signal for switching the direction switching valves 131a and 131b to the right position in the figure is output. As a result, the pressure oil becomes #
Hydraulic cylinder 68 for vertical rollers 13a and 13b
The vertical rollers 13a, 13b retreat in the horizontal roller axial direction after flowing into the rod sides a, b. Then, the process proceeds to step S18, where the strokes of the hydraulic cylinders 68a, 68b detected by the position sensors 130a, 130b are input, and in step S19,
It is determined whether the vertical rollers 13a and 13b have retracted to the standby position. If the vertical rollers 13a and 13b have not yet returned to the standby position, the determination is not satisfied and the procedure returns to step S18. If the vertical rollers 13a and 13b return to the standby position, the determination is satisfied, and the routine goes to Step S20, where the direction switching valve 1
A control signal for returning 35a, b to the neutral position is output. As a result, the # 1 to # 4 vertical rollers 13a and 13b again return to the standby positions as shown in FIG.

Then, the process proceeds to step S21, where the detection signal from the correction material passage recognition sensor 69b is input, and the process proceeds to step S22.
It is determined whether or not the passage of the tail end of the H-section steel 11 is detected. If the tail end has not passed yet, this determination is not satisfied, and the procedure returns to step S21. When the tail end passes, this determination is satisfied, and the routine goes to Step S23. In step S23, after a predetermined time delay Δt4 has elapsed from the detection of the passage of the tail end, #
ON / OFF corresponding to 5- # 9 vertical rollers 13a, b
A control signal for turning off the switching valves 135a and 135b is output. At this time, Δt4 is set so as to be just before the tail end of the H-section steel 11 passes through the # 4 horizontal rollers 27a, b. Then, the process proceeds to step S24, where the direction switching valve 131
A control signal for switching a and b to the right position in the figure is output. Thereby, the pressurized oil is # 5 to # 9 vertical rollers 13a,
b flows into the rod side of the hydraulic cylinders 68a, 68b, and the vertical rollers 13a, 13b retreat in the horizontal roller axis direction. Then, the process proceeds to step S25, in which the strokes of the hydraulic cylinders 68a, 68b detected by the position sensors 130a, 130b are input. In step S26, the vertical rollers 13a,
It is determined whether or not b has retreated. Still vertical roller 13
If a and b have not returned to the standby position, the determination is not satisfied, and the process returns to step S25. If the vertical rollers 13a and 13b return to the standby position, the determination is satisfied, and the procedure proceeds to step S27.
And outputs a control signal for returning the direction switching valves 135a and 135b to the neutral position. As a result, the # 5 to # 9 vertical rollers 13a and 13b are brought to the standby positions as shown in FIG. 7, and the flow ends.

As described above, the straightening operation of applying an appropriate straightening load while pressing the straightening material (H-section steel) 11 from the front end to the tail end with the vertical rollers 13a and 13b is performed, and the high quality without the flange falling down is performed.・ Perform high-precision correction.

According to the present embodiment configured as described above, the following operational effects can be obtained. In other words, even when the flanges on the horizontal rollers # 1 to # 9 side are inclined inward and the opposite roller side is inclined outward when the H-shaped steel 11 is straightened, the vertical roller 1
This can be prevented by the pressing force on the flanges 3a and 3b. At this time, 1 supporting the vertical rollers 13a and 13b
By connecting the pair of chocks 167a and 167b to the bearing case 113a and 113b of the two-sided horizontal roller shaft, compared to the cantilever type conventional structure in which the vertical roller supporting means is separately provided,
The size of the vertical roller supporting means can be reduced. Also,
Even when the roller pitch of the # 1 to # 9 horizontal rollers is changed, the vertical rollers 13a and 13b move together following the pitch movement of the # 1 to # 9 horizontal rollers.
There is no need to provide a vertical roller moving device or the like. Further, since the support of the horizontal roller shaft is of a double-supporting type, the straightening machine 4
6, the deflection itself due to the correction load decreases, and the slight possible deflection displacement becomes symmetrical with respect to the horizontal roller axis direction.
Even if the angle adjustment is not performed, the H-section steel 11 is straightened without tilting, and more accurate and high-quality straightening can be performed with high efficiency.

Further, since the ON / OFF switching valves 135a and 135b are set to the ON position and the pressure oil controlled to a predetermined pressure through the pressure control valves 132a and 132b is supplied to the hydraulic cylinders 68a and 68b, the hydraulic cylinders 68a and 68b Pressure by H
The force can be controlled freely according to the size of the shape steel 11. Therefore, the flange outer surface can be pressed with high accuracy, quickly and reliably with an optimum pressing load, and it is possible to reliably prevent overpressure and uncorrection, which were difficult to prevent conventionally. The pressing force applied to the flange acts as a compressive force in the width direction of the wave, but the pressing force is appropriately controlled by the pressure control valves 132a and 132b to prevent the deformation of the wave. There is also an effect.

Further, when the straightening material passage recognition sensors 69a, b detect that the tip of the H-section steel 11 has passed at the start of straightening, the # 1 to # 4 vertical rollers 13a,
b is advanced, and in response to the fact that the tip of the H-section steel 11 has passed by the straightening material passing recognition sensor 69b, #
Since the configuration is such that the # 5 to # 9 vertical rollers 13a and 13b are advanced, a trouble of the H-section steel 11 occurs between the # 1 to # 4 horizontal rollers, and the H-section steel 11 is not sent after # 5. In this case, the # 5 to # 9 vertical rollers 13a and 13b continue to wait without any change.
Accidents that a and b collide with the horizontal rollers and are damaged are reliably prevented, and safety is ensured. Further, since the flange can be prevented from falling from the front end to the tail end without stopping the H-section steel 11, there is also an effect that a high-performance and highly productive roller straightening machine can be provided.

The accumulator 134 is connected to the bottom side of the hydraulic cylinders 68a, 68b, that is, to the pressurized side pipeline.
a, b and the relief valves 133a, 133b, the position setting error of the vertical rollers 13a, b and H
Hydraulic cylinder 68a due to trouble in transporting section steel 11,
(b) Excessive pressure increase can be prevented, and the machine can be protected.

Further, in general, various types of shaped steel such as an angle iron and the like are manufactured and shaped by the same roller straightening machine in the manufacturing equipment of the shaped steel in addition to the H-shaped steel. In the machine 46, if the horizontal rollers are replaced and the vertical rollers 13a and 13b are set to the maximum open state by the hydraulic cylinders 68a and 68b, straightening of other angle irons and the like can be performed without causing a passage obstacle. .

In the above embodiment, the correction material passage recognition sensor 69a is disposed upstream of the # 1 horizontal roller and the correction material passage recognition sensor 69b is disposed upstream of the # 6 horizontal roller. The present invention is not limited to this, and three or more may be arranged. That is, it suffices to detect the passage of the H-beam on the upstream side of at least one of the plurality of horizontal rollers. In addition, the # 1 to # 4 vertical rollers 13a and 13b are simultaneously advanced with a predetermined time delay Δt1 from the detection of the passage of the leading end of the correction material passage recognition sensor 69a, but the invention is not limited thereto. A time delay may be set. # 5 by the straightening material passage recognition sensor 69b
# 9 When the vertical rollers 13a and 13b advance (time delay Δt
The same applies to 2). The same applies to the time delays Δt3 and Δt4 when the tail end passage is detected.

[0043]

According to the present invention, the size of the vertical roller supporting means can be reduced as compared with a cantilever type structure in which the vertical roller supporting means is separately provided. Further, since the vertical rollers move together with the pitch movement of the horizontal rollers, there is no need to provide a vertical roller moving device or the like. Therefore, an economical roller straightening machine excellent in operability and maintainability can be provided. Furthermore, by being a double-supported type, the vertical rigidity of the straightening machine is increased, the deflection itself due to the straightening load is reduced, and the slightly possible deflection displacement is also symmetrical with respect to the horizontal roller axis direction. Even if the angle of the vertical roller is not adjusted, the straightening material is straightened without tilting.
Therefore, an H-beam with higher precision and higher quality can be manufactured.

[Brief description of the drawings]

FIG. 1 is a side sectional view illustrating a structure of an upper roller and a bearing structure provided in a roller straightening machine according to an embodiment of the present invention.

FIG. 2 is a front view illustrating the entire structure of a large roller straightening machine.

FIG. 3 is a view as seen from the line II in FIG. 1;

FIG. 4 is a circuit diagram of a hydraulic circuit that supplies pressure oil to a hydraulic cylinder.

FIG. 5 is a diagram showing signal exchange between a pressure control valve, an ON / OFF switching valve, and a direction switching valve and a control device.

FIG. 6 is a diagram illustrating control contents of a control device.

FIG. 7 is a diagram illustrating a standby position state of a vertical roller before a correction member is bitten.

FIG. 8 is a diagram illustrating a state in which a vertical roller is slightly advanced in a horizontal roller axis direction and is pressing a correction material.

[Explanation of symbols]

13a, b Vertical roller 27a, b Split roller (horizontal roller) 46 Straightener 67a, b Chock 67a A Slider unit 68a, b Hydraulic cylinder 69a, b Straightener passage recognition sensor (second detecting means) 113a, b Bearing case ( Bearing box) 113aA groove 130a, b Position sensor (first detecting means) 131a, b Direction switching valve 132a, b Pressure control valve 135a, b ON / OFF switching valve 200 Control device (control means)

Continued on front page (72) Inventor Yukio Fujii 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Minor Komatsubara 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Stock Inside the company (72) Inventor Shogo Tomita 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Pipe Co., Ltd. (72) Inventor Makoto Watanabe 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Pipe Co., Ltd.

Claims (5)

[Claims] A plurality of horizontal rollers arranged alternately up and down along a longitudinal direction of the H-section steel; and a plurality of pairs of vertical rollers contacting an outer surface of a flange of the H-section steel. In a roller straightening machine that performs straightening while preventing the flange of a shaped steel from falling, two shafts of each horizontal roller are supported at both ends via bearing boxes, and two shafts rotatably support each pair of vertical rollers. The roller straightening machine, wherein the chocks are respectively connected to two bearing boxes at both ends of the corresponding horizontal roller. 2. A roller straightening machine according to claim 1, wherein each of said two chocks is slidably engaged with a groove provided near a lower end of a corresponding bearing box so as to be slidable in a horizontal roller axial direction. A roller straightening machine comprising: 3. The roller straightening machine according to claim 2, wherein a hydraulic cylinder fixed to each bearing housing for moving the corresponding chock forward and backward, and a pressure of hydraulic oil supplied from the hydraulic oil source to each hydraulic cylinder are controlled. A pressure control valve, an ON / OFF switching valve capable of connecting / disconnecting a pipe connecting the pressure control valve and the hydraulic cylinder, and a pressure oil source that does not pass through the pressure control valve and the ON / OFF switching valve. A direction switching valve for switching the direction of pressure oil supplied to each hydraulic cylinder,
A roller straightening machine further comprising control means for controlling operations of the pressure control valve and the direction switching valve. 4. The roller straightening machine according to claim 3, further comprising first detection means for outputting a detection signal according to a stroke amount of said hydraulic cylinder, wherein said control means comprises:
A roller straightening machine, wherein the direction switching valve is switched in accordance with a detection signal from the first sensor. 5. The roller straightening machine according to claim 3, further comprising a second detecting means capable of detecting the passage of an H-beam on the upstream side of at least one path of the plurality of horizontal rollers, wherein the control is performed. The means for switching the ON / OFF switching valve according to a detection signal from the second detection means.