JP3340039B2 - Continuous straightening method for deformed steel such as rails - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously correcting the bending of a deformed steel such as a rail after rolling, and more particularly to a method for correcting an end bending of a deformed steel such as a rail. The present invention relates to a continuous straightening method for steel.

[0002]

2. Description of the Related Art Conventionally, as a method of eliminating bending of an end portion of a rail after rolling, a remaining bending is corrected by a roller straightening machine at a normal temperature. However, in the roller straightening machine, for the part shorter than the adjacent roll interval,
Since the bending moment was not sufficiently applied, the initial bending before straightening could not be completely eliminated. for that reason,
After the roller straightening process, a press straightening operation was manually performed with low productivity.

In recent years, as a technique for eliminating such end bending, Japanese Patent Laid-Open Publication No. Hei 5-76921 discloses a technique in which a rail is bent on a cooling floor so that the head of the rail is outside the bending, and the rail is turned sideways. In cooling, a method is proposed in which both ends of a rail mounted on a cooling floor are bent so that the head side is outside the bending, and Japanese Patent Application Laid-Open No. 6-292925 discloses a method in which a cooling floor is used. There is disclosed a method of forcibly cooling the back of the leg at the end of the rail to reduce the bending at the end at room temperature.

[0004]

However, Japanese Patent Laid-Open Publication No.
The methods disclosed in JP-A-6921 and JP-A-6-292925 still have the following problems to be solved. That is, the method disclosed in Japanese Patent Application Laid-Open No. 5-76921 has the following problems. (1) A sufficient bending deformation cannot be given to the rail end corresponding to the uncorrectable length equal to the interval between adjacent rolls of the roller straightener. (2) If the bending phenomenon accompanying the cooling of the rail has already started at the time of mechanical refraction, the control amount will be excessive or insufficient. (3) Since the bending direction is one direction, an appropriate plastic deformation cannot be given to the bending in rolling. (4) In order to cope with various product lengths, a mechanism for setting a plurality of cooling floors according to the product lengths is required, which not only requires a large capital investment but also significantly impairs productivity. I do.

On the other hand, the method disclosed in Japanese Patent Application Laid-Open No. 6-292925 has the following problems. (1) Since the temperature range in which this method works effectively is limited, it is difficult to correct the rail if the temperature condition changes significantly between the front and rear pieces of the bloom as in normal operation. It is. (2) The end bending after the roller straightener cannot be completely eliminated by processing only the last piece of bloom.

By the way, the present applicant has studied the behavior of a high-temperature rail after hot rolling up to room temperature, and found that the head and legs having different cooling conditions due to the asymmetrical cross-sectional shape of the rail. When cooling from a high-temperature state to a normal-temperature state on a cooling bed in order to have each part pass through the transformation temperature (the A1 transformation point temperature of the pearlite transformation) at different timings, as shown in FIG. As shown schematically in the figure, the longitudinal parietal surface (or back of the leg)
Indicates a complicated shape change (bending change). That is, the shrinkage δh of the shaped steel head and the shrinkage δb of the legs from the end of rolling to room temperature are respectively δh = δh1-δh2 (δh1: heat shrinkage, δh2: pearlite transformation expansion) δb = δb1-δb2 (Δb1: heat shrinkage, δb2: pearlite transformation expansion). Therefore, when the rail is corrected by hot working, the amount of contraction δh and δb in the head and legs from the time of correction to cooling to the normal temperature state is taken into consideration, and as shown in FIG. It is necessary to determine the amount of bending.

The present invention has been made based on such knowledge. In the process of continuously transporting rails, each rail is suitable for each rail in accordance with each rail temperature at the time of press straightening. It is an object of the present invention to provide a method of continuously correcting deformed steel such as rails, which can efficiently and precisely apply bent to a leading end and a trailing end of a rail.

[0008]

[Means for Solving the Problems]

According to a first aspect of the present invention, there is provided a method for continuously correcting a deformed steel such as a rail, wherein the deformed steel in a hot state after rolling is continuously disposed in the middle of a transfer table. A straightening method for a deformed steel such as a rail for imparting a correction bending amount to the deformed steel by the press straightening machine, wherein the press straightening machine is disposed on the transfer table in a longitudinal direction. It comprises first and second press straightening machines installed at intervals, and on the transfer table, an upstream portion of the first press straightening machine, and a downstream portion of the second press straightening machine. , The first and second
First, second and third section steel guide devices are provided at an intermediate portion with the press straightening machine, respectively, and the first
And first and second stoppers are provided at an intermediate portion of the second press straightening machine, and the deformed shape guided and fed into the first press straightening machine by the first section steel guiding device. The tip of the steel is brought into contact with the first stopper, the tip of the deformed steel is press-straightened, and then the deformed steel is once passed through the second steel guide device to the second stopper. After passing through the press straightening machine of the above, the rear end portion of the deformed shaped steel is brought into contact with the second stopper through the third shaped steel guide device, and the rear end of the deformed shaped steel is contacted. Press straightening the rear end.

According to a second aspect of the present invention, there is provided a method for continuously correcting a deformed steel such as a rail, wherein the deformed steel in a hot state after rolling is continuously directed to a press straightening machine installed in the middle of a transfer table. Conveying, a continuous straightening method for deformed steel such as rails for imparting a corrected bending amount to the deformed steel by the press straightening machine, wherein the single press straightening machine is installed on the transfer table. A press straightening machine, a first shaped steel guide device and a second stopper are provided on an upstream portion of the single press straightening device, and a second shaped steel guide device and a first stopper are provided on a downstream portion thereof. A stopper is provided, and a tip end of the deformed section guided and fed into the press straightening machine by the first section guide device is brought into contact with the first stopper, and the deformed section is formed. Press straightening the tip of Next, after once passing the deformed shaped steel through the press straightening machine via the second shaped steel guide device, the deformed shaped steel is conveyed in the opposite direction through the second shaped steel guide device, and The rear end of the steel is brought into contact with the second stopper, and the rear end of the deformed steel is press-corrected.

According to a third aspect of the present invention, there is provided a method for continuously correcting a deformed steel such as a rail according to the first or second aspect. In this state, the deformed steel is press-straightened, and when the deformed steel is transported on the transfer table, the press straightening machine is fixed to a fixing machine frame by a clamp device.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, with reference to the attached drawings, a plurality of embodiments embodying the present invention will be described to provide an understanding of the present invention. First Embodiment First, a configuration of press straightening machines 13 and 14 that can be suitably used in a method for continuously straightening deformed steel such as rails according to a first embodiment of the present invention will be described with reference to FIG. This will be specifically described with reference to FIGS. As shown in FIG. 1, a first transfer table 10 and a second transfer table 10 each having a section steel transfer surface on the upper surface.
And a plurality of rails 12 as an example of deformed steel cut to a predetermined length after being rolled by operating these transfer tables 10 and 11. The transfer is performed from the first transfer table 10 to the second transfer table 11 in order.

On these transfer tables 10 and 11,
The first press straightening machine 13 is provided at a predetermined interval in the longitudinal direction.
And a second press straightening machine 14. Then, as described later, the first press straightening machine 13 is used to straighten the tip of the rail 12 and bends the second press straightening machine.
Press straightening machine 14 is used to straighten the rear end of the rail 12.

Further, as shown in FIG. 1, on the first and second transfer tables 10 and 11, a portion which is on the upstream side of the first press straightening machine 13 and the first press straightening machine 13.
And between the second press straightening machine 14 and
The first, second and third section steel guide devices 15 and 16 are located on the downstream side of the press straightening machine 14, respectively.
17 are provided. On the other hand, the first press straightening machine 13
A stopper 18 is provided near the downstream side of the rail 12 with which the tip 12a of the rail 12 abuts, and a rear end 12b of the rail 12 abuts near the upstream side of the second press straightening machine 14. A stopper 19 is provided.

Further, as shown in FIG. 1, a pair of first and second temperature sensors 2 are provided on the upstream side of the first press straightening machine 13 and on the downstream side of the second press straightening machine 14, respectively.
0, 20a, 21 and 21a are attached with the first and second transfer tables 10 and 11 sandwiched therebetween. The first temperature sensors 20 and 20a measure the head-side temperature and the leg-side temperature of the tip 12a of the rail 12, and
Temperature sensors 21 and 21a are at the rear end 12b of the rail 12.
Measure head temperature and leg temperature.

Next, the configuration of the first and second press straightening machines 13 and 14 will be described with reference to FIG. In addition,
Since these press straightening machines 13 and 14 have the same configuration, the configuration of the press straightening machine 13 will be described below.
The description of the configuration of the press straightening machine 14 is omitted. As shown in FIG. 2, a plurality of pairs (5 in this embodiment) are centered on the center axis 22 of the first and second transfer tables 10 and 11.
Pairs) of abutments 23 to 27 and 23a to 27a are arranged symmetrically and at equal intervals in the longitudinal direction.

These payments 23-27, 23a-27a
In the rear part, a metal support device 2 that is symmetrical and long in the longitudinal direction
8 and 29 are provided, and the respective pay-supporting devices 28 and 29 are provided.
In the inside, there are provided a plurality of cash advance / retract cylinders 30-27 capable of independently moving the money 23-27, 23a-27a toward the center axis 22 of the first and second transfer tables 10, 11, respectively. 34, 30a to 34a are attached. Further, support device advance / retreat cylinders 35, 36 are disposed symmetrically at the rear of the respective pay support devices 28, 29. By operating the support device advance / retreat cylinders 35, 36, the pay support devices 28, 29 are operated. , 29 and abutments 23-27, 23a-27 integral with the abutment support devices 28, 29
a can be integrally advanced and retracted toward the central axis 22 of the first and second transfer tables 10 and 11. Also,
Money 23-27, 23a-27a, Money advance / retreat cylinder 3
0-34, 30a-34a, gold support devices 28, 29,
Further, the support device reciprocating cylinders 35 and 36 are all attached to a gate-shaped fixed frame 37 that is laid on the first transfer table 10 integrally.

Next, a control system for controlling the operation of the press straightening machines 13 and 14 having the above-described configuration will be described. As shown in FIG. 1, first and second temperature sensors 20, 20a, 21 and 21a are provided. Is connected to the input port of the control device 38, while the output port of the control device 38 is connected to the money advance / retreat cylinders 30-34, 30 a-34 a and the support device of the first and second press straightening machines 13, 14. It is connected to a hydraulic control unit that operates the reciprocating cylinders 35 and 36.

Next, a description will be given of a method for continuously straightening deformed shaped steel such as rails by the press straightening machines 13 and 14 having the above-described structure. The rail 12 that has finished rolling and that has been cut to the product length by hot sawing is placed on the first transfer table 1.
It is conveyed on the upper side to the first press straightening machine 13. During this conveyance, the head temperature and the leg side temperature of the tip 12a of the rail 12 are measured by the first temperature sensors 20, 20a, and the temperature and material data (material dimensions,
Of the plurality of coins 23-27, 23a-27a, and the coin advance / retreat cylinders 30-34, 30a-34a of the plurality of coins 23-27, 23a-27a. Stroke (Advance and retreat)
Is adjusted, the first envelope is formed by the rail contact surfaces of the abutments 23 to 27, and the second envelope is formed by the rail abutment surfaces of the abutments 23a to 27a.

Thereafter, the distal end portion 12a of the rail 12 is guided by the first section guide device 15 which is converged toward the downstream side by the movement of the first transfer table 10, and is introduced into the first press straightening machine 13. The rails 12 are fed and the front end surfaces thereof are brought into contact with the stoppers 18, so that the front end portions 12a of the rails 12 are accurately positioned at the press correction position.
Then, by operating the support device advance / retreat cylinders 35 and 36, the abutment support devices 28 and 29 advance, and the tip 12a of the rail 12 is corrected. At this time, the support device advance / retreat cylinders 35 and 36 for driving the pay-metal support devices 28 and 29 pressing the rail 12 also include the pay-available cylinders 30 to 3.
4, as in the case of 30a to 34a, the temperature sensor 20,
The target stroke will be determined based on the temperature result measured by 20a. The correction bending amount of the distal end portion 12a of the rail 12 is determined by considering the contraction amount (shrinkage amounts δh and δb in FIG. 6) from the time of correction to cooling to the normal temperature state, and finally the rail 12 The distal end portion 12a is set to be linear. When determining the stroke amounts of the above-mentioned money advance / retreat cylinders 30 to 34, 30a to 34a and the support device advance / retreat cylinders 35, 36, the temperature drop until the press correction is actually performed must be taken into consideration.

After the tip 12a of the rail 12 is pressed and straightened by the first press straightening machine 13 in this way, the stopper 18 is released and the rail 12 is moved from the first transfer table 10 to the second transfer table. Move to 11.
Thereafter, the second temperature sensors 21 and 21a detect the rail 12
Similarly, the head temperature and the leg temperature of the rear end 12b of the rail 12 are measured, and the rail 12 is retracted until the rear end 12b of the rail 12 comes into contact with the stopper 19 in the same manner as the temperature measurement of the front end 12a of the rail 12. . Then, based on the measured temperature results, the plurality of abutments 23 to 23 of the second press straightening machine 14 are formed.
By adjusting the strokes of the support devices 27 and 23a to 27a and the target strokes of the support device reciprocating cylinders 35 and 36,
The first envelope is formed by the rail contact surfaces of Nos. To 27, and the second envelope is formed by the rail contact surfaces of the abutments 23a to 27a.

Thereafter, the support device advance / retreat cylinders 35, 36
By this operation, the money supporting devices 28 and 29 advance and retreat, and the rear end 12b of the rail 12 is corrected. In this case as well, the correction bending amount of the rear end portion 12b of the rail 12 is determined in consideration of the contraction amount (shrinkage amounts δh and δb in FIG. 6) from the time of correction to cooling to the normal temperature state. The rear end 12b is set to be linear.

In this embodiment, four temperature sensors 20, 20 a, 21, 21 are used to measure the head side and leg side temperatures at the front end 12 a and the rear end 12 b of the rail 12.
was used, but only the first temperature sensors 20 and 20a were used.
The temperature of the front and rear ends 12a and 12b of the rail 12 can also be measured. In addition, only at the temperatures of several points at arbitrary positions on the rail 12, the money advance / retreat cylinders 30 to 34, 30a to
The temperature sensors can be integrated by determining the stroke amounts of all the cylinders 34a and the support device reciprocating cylinders 35 and 36.

As described above, in the present embodiment, for each piece cut by hot sawing in accordance with the temperature of each rail 12, the leading end 12 a and the trailing end 12 b of the rail 12 are press-corrected to obtain an arbitrary part. Give the amount of correction bending (bending shape)
Considering the shrinkage from the time of correction to cooling to the normal temperature state (shrinkage δh, δb in FIG. 6), the leading end 12a and the trailing end 12b of the rail 12 are finally made linear. I have.

In the above-described embodiment, each of the press straightening machines 13 and 14 includes a plurality of abutments 23 to 27 and 23a.
当 27a which presses and moves the cylinders 30-34,
In addition to 30a to 34a, it has been described as having the supporting device advance / retreat cylinders 35 and 36 for pressing and moving the paying support devices 28 and 29. However, the paying support device is fixed and individual When a moving mechanism, a pressing mechanism, and a position control mechanism are provided,
It is also possible to change the target values of the strokes of the individual payments 23 to 27 and 23a to 27a.

(Second Embodiment) As shown in FIG. 4, a method for continuously straightening deformed shaped steel such as rails according to the present embodiment includes first and second fixed
The press straightening machines 47 and 48 are swingably supported by first and second suspension wires 49 and 50 and can be fixed to the fixing machine frame 41 by clamping devices 51 and 52. Have. That is, as shown in FIG. 4, the fixing machine frame 41 is installed above the transport table 40 in a state of extending in the longitudinal direction. The fixing machine frame 41 is substantially composed of a front vertical column 42, a rear vertical column 43, and a horizontal beam 44 erected between the upper ends of both vertical columns 42, 43.
And first and second stopper lifting / lowering guide cylinders 45 and 46 suspended from the horizontal beam 44 at intervals in the longitudinal direction.

A first press straightening machine 47 corresponding to the first press straightening machine 13 according to the first embodiment is disposed between the front vertical column 42 and the first stopper raising / lowering guide cylinder 45. The press straightening machine 47 is swingably supported by a first suspension wire 49. on the other hand,
A second press straightening machine 48 corresponding to the second press straightening machine 14 according to the first embodiment is disposed between the rear vertical column 43 and the second stopper lifting / lowering guide cylinder 46. The press straightening machine 48 is swingably supported by a second support wire 50.

The front vertical support 42, the rear vertical support 43, and the first and second stopper lifting / lowering guide cylinders 45, 46 of the fixing machine frame 41 are provided with clamping devices 51, 52, 5 respectively.
3, 54 are attached. And the clamping device 5
The first press straightening machine 47 is fixed to the fixing machine
1 and a clamping device 5
The second press straightening machine 48 is fixed to the fixing machine
1 can be clamped.

The first and second press straightening machines 47 and 48 have the same configuration, and in addition to the metal support device 55, although not shown, the first and second press straightening machines in the first embodiment. Like the press straightening machines 13 and 14, it is provided with a cash, a money moving cylinder and a supporting device moving cylinder. As shown in FIG. 4, the first and second stopper elevating guide cylinders 45 and 46 are provided with first and second stoppers which can abut on the front end 56a and the rear end 56b of the rail 56, respectively. 57 and 58 are mounted so as to be able to move up and down. With the above-described configuration, in the present embodiment, the clamp devices 51 to 54 are unclamped during the press straightening by the first and second press straightening machines 47 and 48, and the coin supporting device 5
5 is separated from the fixed machine frame 41 so that the rail 56
Product bending deformation can be prevented.

Next, the first and second components having the above-described configuration will be described.
The continuous straightening method for deformed shaped steel such as rails by the press straightening machines 47 and 48 will be described. After the tip 56a of the rail 56 is press-straightened by the press straightener 47, the first and second stoppers 57 and 58 are raised, and the rail 56 is transported downstream. At this time, the abutment support device 55 of the first press straightening machine 47 is locked by the clamp devices 51 and 53. Accordingly, the rail 56 collides with the abutment when passing through the rail 56, thereby preventing damage to the equipment and preventing abnormal bending of the rail 56 due to contact.

After the rear end 56b of the rail 56 has passed through the second stopper 58, the stopper 58 is lowered, the transport table 40 is reversed, and the rail 56 is brought into contact with the stopper 58 so that the rail 56 is The press straightening position by the second press straightening machine 48 can be accurately positioned. Then, the rear end 56b of the rail 56
Press straightening.

In the first and second embodiments, the rail is straightened by using two press straightening machines. However, the rail is straightened by using only one press straightening machine. When performing press straightening with the end, not shown,
A first section steel guide device and a second stopper are arranged on an upstream portion on the front and rear transport tables of the press straightening machine, and a second section steel guide device and a first stopper are provided on a downstream portion thereof. By installing, the method for continuously correcting deformed steel such as rails according to the present invention becomes possible.

That is, the tip of the deformed steel section guided and fed into the press straightening machine by the first section steel guide device is brought into contact with the first stopper, and the tip of the deformed steel section is press-straightened. Then, after the deformed steel is once passed through the press straightening device via the second shaped steel guide device, the deformed steel is conveyed in the opposite direction through the second shaped steel guide device, and is then transferred to the rear of the deformed steel. The end can be pressed against the second stopper, and the rear end of the deformed steel can be press-straightened.

[0034]

【The invention's effect】

[0035]

Claim 1 and dependent claim 3
In the continuous straightening method of deformed steel such as rails described,
Rails that transfer the deformed steel in the hot state after rolling continuously to the press straightening machine installed in the middle of the transfer table, and apply a correction bending amount to the deformed steel by the press straightening machine A method for continuous straightening of deformed steel, wherein the press straightening machine comprises first and second press straightening machines which are installed on a transfer table at intervals in a longitudinal direction,
An upstream portion of the first press straightener on the transport table;
First, second, and third section steel guide devices are provided at a downstream portion of the second press straightening machine and at an intermediate portion between the first and second press straightening machines, respectively, and the first and second sections are provided. 2
First and second stoppers are provided at an intermediate portion of the press straightening machine, and the leading end of the deformed section guided and fed to the first press straightening machine by the first section steel guiding device is formed as a first stopper. (1) abutting against the stopper of (1), press-correcting the tip of the deformed steel, and then passing the deformed steel through the second press straightening machine once through the second shaped steel guide device,
It is conveyed in the opposite direction via a third shaped steel guide device, and the rear end of the deformed steel is brought into contact with the second stopper so that the rear end of the deformed steel is press-corrected.

As described above, the press straightening can be performed after the front end and the rear end of the deformed steel are accurately positioned at the press straightening position, so that the end bending of the deformed steel can be corrected with high precision. It is possible to reduce the off-line press work of deformed steel.

Claim 2 and dependent claim 3
The continuous straightening method for deformed shaped steel such as the described rails is such that a deformed steel in a hot state after rolling is continuously transferred to a press straightening machine installed in the middle of a transfer table, and a press straightening machine is used. A method for continuously straightening deformed shaped steel such as rails that imparts a correction bending amount to the deformed shaped steel by using a single press straightening machine in which a press straightening machine is installed on a transfer table, and a single press straightening machine. A first section steel guide device and a second stopper are provided in an upstream portion of the straightening machine,
A second section steel guide device and a first stopper are provided on the downstream side thereof, and the tip of the deformed section steel guided and fed to the press straightening machine by the first section steel guide device is provided as a first section. Abuts against the stopper, press-straightens the tip of the deformed steel, and then passes the deformed steel through a press straightening machine via the second steel-shape guide device, and then presses the second shaped steel. The rear end of the deformed steel is conveyed in the opposite direction via a guide device so that the rear end of the deformed steel abuts against the second stopper, and the rear end of the deformed steel is press-straightened.

As described above, since the press straightening can be performed after accurately positioning the leading end and the rear end of the deformed steel at the press straightening position, the bending of the end of the deformed steel can be corrected with high precision. In addition, the off-line pressing work of the deformed steel can be reduced, and the equipment cost can be reduced because it is performed by a single press straightening machine.

In particular, according to the third aspect of the present invention, there is provided a method for continuously correcting a deformed steel such as a rail, wherein the deformed steel is press-corrected while a press straightening device is swingably supported and the deformed steel is deformed on a transfer table. When conveying steel, a press straightening machine is fixed to a fixing machine frame by a clamp device. Therefore, during the press straightening, the clamp device is unclamped and the press straightener is rocked, whereby the product bending deformation of the deformed steel can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a press straightening facility that can be suitably used in a method for continuously straightening deformed steel such as rails according to a first embodiment of the present invention.

FIG. 2 is a plan sectional view of the press straightening machine.

FIG. 3 is a cross-sectional view taken along line II of FIG. 2;

FIG. 4 is a side view of a press straightening facility that can be suitably used in a method for continuously straightening deformed shaped steel such as rails according to a second embodiment.

FIG. 5 is an explanatory diagram showing a change over time in curvature of a rail top surface.

FIG. 6 is an explanatory diagram showing a temporal change in curvature of a rail top surface.

[Explanation of symbols]

10: first transfer table, 11: second transfer table, 12: rail (deformed steel), 12a: tip, 12
b: rear end portion, 13: press straightening machine, 14: press straightening machine, 15: first section steel guide apparatus, 16: second section steel guide apparatus, 17: third section steel guide apparatus, 18: Stopper, 19: stopper, 20: first temperature sensor, 2
0a: first temperature sensor, 21: second temperature sensor, 2
1a: second temperature sensor, 22: central axis, 23: equivalent, 23a: equivalent, 24: equivalent, 24a: equivalent, 25:
This money, 25a: This money, 26: This money, 26a: This money, 2
7: Money, 27a: Money, 28: Money support device, 29:
30: a money advance / retreat cylinder, 31: a money advance / retreat cylinder, 31a: a money advance / retreat cylinder, 32: a money advance / retreat cylinder, 32a: a money advance / retreat cylinder, 33: Gold advance / retreat cylinder, 33a: gold advance / retreat cylinder, 34: gold advance / retreat cylinder, 34a: gold advance / retreat cylinder, 35: support device advance / retreat cylinder, 36: support device advance / retreat cylinder, 37: portal fixed frame, 38:
Control device, 40: transport table, 41: fixed machine frame, 4
2: front vertical support, 43: rear vertical support, 44: horizontal beam, 45: first stopper elevating guide tube, 46: second
Stopper elevating guide cylinder, 47: first press straightening machine,
48: second press straightening machine, 49: first suspension wire,
50: second suspension wire, 51: clamping device, 52:
Clamping device, 53: Clamping device, 54: Clamping device, 55: Abutment support device, 56: Rail, 56a: Front end portion, 56b: Rear end portion, 57: First stopper, 58:
Second stopper

Continued on the front page (72) Inventor Toshihiro Ishibashi 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (72) Inventor Masafumi Yano 1-1-1, Tobata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka New Nippon Steel Corporation Yawata Works (72) Inventor Nori Hamachi 1-1-1, Tobata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka Prefecture Nippon Steel Corporation Yawata Works (56) References JP-A-9-168814 ( JP, A) JP-A-9-248629 (JP, A) JP-A-6-292925 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21D 3/10 B21D 3/05

Claims (3)

(57) [Claims] 1. A deformed steel in a hot state after rolling is continuously conveyed to a press straightening machine installed in the middle of a conveying table, and the press straightening machine straightens and deforms the deformed steel. A method for continuously straightening deformed shaped steel such as rails for imparting an amount, wherein the press straightening machine comprises first and second press straightening machines which are installed on the transfer table at intervals in a longitudinal direction. On the transfer table, an upstream portion of the first press straightening device, a downstream portion of the second press straightening device, and an intermediate portion between the first and second press straightening devices, respectively. First, second and third shaped steel guide devices are provided, and first and second stoppers are provided at an intermediate portion of the first and second press straightening machines. Guided by the first shaped steel guide device The tip of the deformed steel that has been sent in is brought into contact with the first stopper, the tip of the deformed steel is press-corrected, and then the deformed steel is moved to the second shape. After passing through the second press straightening device once through the steel guide device, it is conveyed in the reverse direction through the third shaped steel guide device and the rear end of the deformed steel is moved to the second shape straightening device. A continuous straightening method for deformed steel such as rails, wherein a rear end portion of the deformed steel is pressed and straightened by contacting a stopper. 2. The deformed steel in a hot state after rolling is continuously conveyed to a press straightening machine installed in the middle of a conveying table, and the press straightening machine straightens the bent steel into the deformed steel. A method for continuously straightening deformed shaped steel such as rails for imparting an amount, wherein the press straightening machine comprises a single press straightening machine installed on the transfer table, and upstream of the single press straightening machine. A side section is provided with a first section steel guide device and a second stopper, and a downstream section thereof is provided with a second section steel guide device and a first stopper, and the press straightening machine is provided with the first section steel guide apparatus and the first stopper. The tip of the deformed steel guided and fed by the shaped steel guide device is brought into contact with the first stopper, and the tip of the deformed steel is press-corrected. Through the second shaped steel guide device And then once passed through the press straightening machine, then conveyed in the opposite direction through the second shaped steel guide device to bring the rear end of the deformed shaped steel into contact with the second stopper, A continuous straightening method for deformed steel such as rails, wherein the rear end of the deformed steel is straightened by press. 3. The press-straightening device in which the deformed steel is press-straightened while the press-straightening machine is swingably supported, and the press-straightening machine is clamped when the deformed steel is transported on the transport table. 3. The method for continuously straightening deformed steel such as rails according to claim 1 or 2, wherein the steel is fixed to a fixing machine frame.