JP3419294B2 - Section steel straightening machine and continuous 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 straightening machine for shaped steel and a continuous straightening device incorporating this straightening machine, and more specifically, for example, a web bend generated in a welded H-section steel,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaped steel straightening machine and a continuous straightening device capable of straightening both a web warp and a squareness defect between the web and the flange simultaneously and continuously.

[0002]

2. Description of the Related Art As is well known, a shaped steel is a rolled shaped steel obtained by sequentially performing rough rolling, intermediate rolling and finish rolling on a rolled material, and a strip-shaped web material and flange material wound in a coil. Are roughly unrolled and combined so as to have a predetermined cross-sectional shape and then welded to obtain a welded shaped steel. In the following description, a welded H-section steel will be taken as an example of the section steel. After the welded H-section steel is welded and formed into a long length, it is conveyed to a cutting machine and cut into a desired length to be a finished product, which is shipped through an inspection process.

By the way, in the molding process and the inspection process,
Shape defects may be found in the welded H-section steel. There are various types of such shape defects, and among them, the long welded H-section steel web before cutting is bent in a direction perpendicular to the web, and the web is bent in the web height direction. It is known that a web warp that bends in a vertical direction and a squareness defect in which a squareness between the web and the flange is out of an allowable range are major quality problems.

Therefore, conventionally, various techniques have been proposed for eliminating the bending of the web, the warp of the web and the defect of the squareness which occur in the H-section steel. For example, Japanese Patent Publication No. 2-5081
As shown in FIG. 11, the publication No. 2 discloses five rolling rolls 1
There has been proposed a technique for straightening the bending of the web 7b by pressing down the flange 7a of the H-shaped steel 7 with the straightening machine 6 including the components 5 to 5 to make the left and right portions of the flange 7a stretch differently.

Further, in Japanese Utility Model Publication No. 6-9754, as shown in FIG. 12, a pressure welding roll 10 tilted by a worm wheel 9 meshing with a rotating worm 8 is described as a welded H-shaped steel 11
There has been proposed a technique for preventing a perpendicularity defect between the web 11b and the flange 11a during positioning before welding by bringing the flange 11a into contact with the outer surface of the flange 11a.

Further, in Japanese Patent Publication No. 8-293350, as shown in FIG. 13 (a) which is a side view and FIG. 13 (b) which is an AA arrow view in FIG. 13 (a), respectively. , A pair of flanges which are provided with web-rolling horizontal rollers 13a to 13g in the conveying direction of the H-section steel 12 and are in contact with the outer surface of the flange of the H-section steel 12 and can be tilted in a plane perpendicular to the pass line of the H-section steel 12. Squareness vertical rollers 14a to 14g and 15a to 15g are provided, and the central axis of each flange squareness vertical roller 14a to 14g, 15a to 15g and the center line of the web pressure horizontal rollers 13a to 13g are on the same plane. A technique for correcting both the web warp and the perpendicularity defect of the H-section steel 12 in combination has been proposed. According to this technique, a straightening roll (horizontal web pressing roller) 13a to 13g is brought into contact with one side of a web 12a of an H-section steel 12 and a zigzag-like bending is repeatedly applied to the web 12a to correct the web warp. Tilt rollers that correct the squareness of the flange 12b (vertical rollers for flange squareness) 14a to 14
g, 15a to 15g are added to enable simultaneous correction of web warp and squareness.

[0007]

However, each of these conventional techniques has the following problems, and it is possible to actually solve the web bending, the web warp, and the squareness defect of the welded H-section steel. Can not.

In the technique proposed by Japanese Examined Patent Publication No. 2-50812, the web bending (horizontal bending) is caused by the left-right balance of the flange 7a, and the web warp (up-down bending) is caused by the down-balance of the flange 7a. Moreover, twisting occurs due to the left-right and up-down balance of the flange 7a. For example, if the plate thickness of the flange 7a changes, the amount of reduction to the left and right of the flange 7a changes, and the flange on the side with a relatively large amount of reduction is extended excessively, and as a result, the web of the H-section steel 7 bends left and right. Will end up. It is not possible to visually check the reduction balance in such a continuous state, and because the five reduction rolls 1 to 5 influence each other in this reduction balance, it is extremely difficult to adjust and it is applied to the actual line. Difficult to do.

The technique proposed by Japanese Utility Model Publication No. 6-9754 aims to accurately position the web 11b and the flange 11a before welding, so that the squareness defect occurring at the time of welding can be corrected. However, it is not possible to correct the squareness defect caused by the external force acting on the web and the flange after welding. Further, as a matter of course, it cannot be applied to rolled H-section steel.

Further, in the device proposed by Japanese Patent Publication No. 8-293350, the number of facility modification is large and the cost of facility modification increases. In addition, when the height size (inner method) of the H-section steel being conveyed is changed, the web rolling horizontal roller 13a
Adjustment of ~ 13g or roll replacement will be required, which will increase the time and man-hour burden required for setup change, and increase the number of rolls held, resulting in higher costs. Also, in order to correct the web bending, a plurality of web pressing horizontal rollers 13
a ~ 13g, but for each web reduction horizontal roller 13a
It is difficult to understand the relationship between the setting of ~ 13g and the resulting correction effect, and it is difficult to make a quick adjustment when a defect occurs. Furthermore, although the vertical rollers for flange squareness 14a to 14g and 15a to 15g that correct the squareness defect are tilted by the cylinder, it is difficult to finely adjust the cylinder stop position (tilt angle), so it is necessary to optimize the stop position. It is difficult to plan.

Further, in these conventional techniques, it is not possible to correct all the bending of the web, the warp of the web and the defect of the right angle by the single straightening machine. Therefore, in order to correct all of them, it is necessary to add or modify a large number of facilities, which causes problems in terms of modification cost and installation space, and it is not easy to incorporate them into existing H-section steel straightening lines, and it is not feasible. Poor.

[0012] The present invention has been made in view of the problems of the prior art as described above, and any one of the bending of the web, the warp of the web, and the perpendicularity defect occurring in the shaped steels such as the H-shaped steel. It is also an object of the present invention to provide a shaped steel straightening machine capable of straightening simultaneously and continuously, and a continuous straightening device incorporating the straightening machine.

More specifically, the object of the present invention is to make a simple judgment and means for adjustment, not to be influenced by the variation of the plate thickness of the shaped steel, and not to apply an excessive load to the web, and to perform a setup change. It is an object of the present invention to provide a straightening machine and a continuous straightening device for a shaped steel that requires a small number of man-hours, a low equipment cost, and a small number of rolls.

[0014]

In order to solve the above-mentioned problems, the present inventor has made earnest studies by taking a welded H-section steel which is conveyed in a conveyance posture in which a flange is in a horizontal plane as a result, and as a result, corrects the bending of the web. The present invention has been completed based on the knowledge (1) to (4) listed below regarding web warp correction and squareness defect correction.

[Web Bending Correction] (1) Since the web bending occurs when the balance of the residual stress in the left and right portions of the flange is lost, the straightening means is to roll down the side of the flange where the elongation is small. And evenly extending, repeatedly bending the right and left portions of the flange to reduce residual stress, and imparting strain to the flange at a yield point or higher to cancel the web bending. Of these correction means, it is the simplest and surest to use the correction means.

As a means for realizing the correction means of (1), there is a means of indirectly bending the flange by pressing the web of the welded H-section steel in the width direction of the flange and providing a vertical guiding and restraining function. However, with this means, the roll position must be adjusted according to variations in web height and flange thickness. Further, since this means is a means for straightening the web bending by indirectly bending the flange having high rigidity to the left and right by pushing the fillet portion (root portion of the web), it is necessary to apply an excessive external force to the fillet portion. As a result, the web may be deformed, the perpendicularity between the web and the flange may be defective, and cracks may occur.

Therefore, in order to realize the correction means,
The welded H-section steel to be conveyed is constrained in the flange width direction at two points in the conveying direction, and the other 1 located at the midpoint of these two points.
At this point, it is most effective to perform the bending process in the flange width direction to directly correct the web bending. When performing this bending work, the welded H-section steel can be held in a stable posture by performing the bending with the welded H-section steel being sufficiently restrained in the up-down direction and the left-right direction. Bending correction can be stably performed.

(2) Specifically, two pairs of vertical rolls for restraining both end faces of the flange of the welded H-section steel are arranged apart from each other in the conveying direction, and the installation positions of these two pairs of vertical rolls are arranged. At the midpoint position, a pair of vertical rolls that are movable in the width direction of the flange while restraining both end faces of the flange of welded H-section steel are arranged, and the pair of vertical rolls restrains both end faces of the flange of welded H-section steel. However, the vertical roll pair may be moved in the flange width direction.

There are two types of web bends, right bend and left bend. However, since both end faces of the flange are constrained by a pair of vertical rolls, the flange can be used for both right bend and left bend. It is possible to correct the bending of the web in both directions while maintaining the state of being restrained.

[Web Warp Straightening] (3) Similar to the web straightening, the welded H-section steel is placed at the midpoint of two horizontal roll pairs arranged at two points separated from each other in the conveying direction of the welded H-section steel. A pair of horizontal rolls that are driven to rotate while being restrained on the outer surface of the flange and movable in the web height direction are arranged. This horizontal roll pair restrains the outer surface of the flange of the welded H-section steel while restraining the outer surface of the flange. Web warpage can be corrected by moving the pair in the web height direction.

In addition, the web warp has an upper warp and a lower warp.
Although there are types, since the outer surfaces of the upper and lower flanges are constrained by the horizontal rolls, it is possible to correct the web warp in both directions while maintaining the condition in which the flanges are constrained.

[Correcting Defects in Squareness] (4) In correcting defects in squareness, a horizontal roll for correcting web warpage is arranged so as to be tiltable with respect to the outer surface of the flange of the welded H-section steel. Then, the horizontal roll is tilted so as to be opposite to the direction in which the flange is tilted, thereby correcting the squareness defect.

Here, what is important in correcting the squareness defect is not to apply an excessive compressive stress to the web. When the roll gap of the pair of horizontal rolls becomes small, a large compressive stress acts on the web in the web height direction, and in the worst case, the web buckles. On the contrary, when the roll gap becomes large, such a problem does not occur, but the guide and the constraint in the web height direction become insufficient. To solve such problems with tilting horizontal roll pairs,
When one end side of the horizontal roll is displaced by a predetermined distance, the other end side is displaced by the same distance in the opposite direction,
By tilting, the distance between the centers of the upper and lower horizontal rolls in the roll cylinder length direction may be made constant. This makes it possible to correct the squareness defect by bending only the flange without causing excessive compressive stress on the web and insufficient guide / restraint. That is, it is possible to prevent the web from being bent by applying a bending force only to the flange, and it is possible to constrain the web by the fillet portion while always maintaining the horizontal state regardless of the elevation and tilt of the horizontal roll.

Here, the gist of the present invention is that the flat end is brought into contact with the flange end surface of the section steel being conveyed by the flare.
A pair of first straightening rolls that can move in the flange width direction while restraining the flange in the flange width direction, and a pair of first straightening rolls that can move in the web height direction while restraining the flange in the web height direction, and the outer surface of the flange. A pair of second straightening rolls that are tiltable with respect to each other, and a straightening roll stand that mounts the pair of first straightening rolls and the pair of second straightening rolls apart from each other in the conveying direction of the shaped steel are provided in combination. Is a straightening machine for shaped steel.

In the straightening machine for shaped steel according to the present invention described above,
A pair of first straightening roll roll gaps, and a pair of second rolls
The fact that the roll gaps of the straightening rolls are variable makes it easy to deal with the dimensional changes of the section steel being conveyed, and also causes excessive compression stress on the web and insufficient guide / restraint. It is desirable because it can be prevented.

Further, in these straightening machines for shaped steel according to the present invention, the roll barrel length of the first straightening roll is set to be larger than the maximum web height of a plurality of types of shaped steel conveyed. , The roll body length of the second straightening roll is set to be larger than the maximum flange width of the plurality of types of shaped steels to be conveyed. Roll exchange should be performed for all the shaped steels to be conveyed. It is desirable because it can be corrected without the need for correction.

Further, in the straightening machine for shaped steel according to the present invention, it is desirable that both the first straightening roll and the second straightening roll are driven rolls in order to simplify the equipment.

In the straightening machine for shaped steel according to the present invention, the pair of first straightening rolls may be arranged upstream of the pair of second straightening rolls in the conveying direction of the shaped steel. It is illustrated.

In these straightening machines for shaped steel according to the present invention, the straightening roll stand includes a first straightening roll stand on which a pair of first straightening rolls are mounted and a second straightening roll stand on which a pair of second straightening rolls is mounted. It is desirable to configure in combination with a straightening roll stand from the viewpoint of facility simplification.

That is, when the welded H-section steel is conveyed in a conveyance posture in which the flange is in the horizontal plane, the shaped steel straightening machine according to the present invention guides the welded H-section steel conveyed by being driven to rotate. And a pair of vertical rolls (first straightening rolls) and a pair of horizontal rolls (second straightening rolls) for supporting the straightening roll stand, and a straightening roll stand equipped with these, which is a pair of vertical rolls. Is installed movably in the horizontal direction while restraining both end surfaces of the flange of the welded H-section steel to continuously perform straightening of the web bend, and a pair of horizontal rolls attaches the outer surface of both flanges of the welded H-section steel. Installed movably in the vertical direction while restraining, and tiltably with respect to both flanges of the welded H-section steel while restraining the outer surface of both flanges. Correcting web warp and squareness defect Continuously performed.

From another point of view, the present invention is a straightening machine for the shaped steel according to the above-mentioned present invention, and is arranged on the upstream side and the downstream side of the straightening machine with respect to the conveying direction of the shaped steel, respectively.
A continuous straightening device for a shaped steel, comprising: a first supporting stand and a second supporting stand that constrain the shaped steel in a flange width direction and a web height direction in combination.

In the continuous straightening device for shaped steel according to the present invention, the welded H-shaped steel conveyed is restrained in the flange width direction and the web height direction by the first support stand and the second support stand, and these The straightener according to the present invention is installed between the first support stand and the second support stand.

Then, the web bending generated in the welded welded H-section steel is measured on the downstream side of the straightening machine according to the present invention, and based on the measurement result, the web is held while restraining both end faces of the flange with a pair of vertical rolls. By moving the pair of vertical rolls in a horizontal direction that cancels the bend, the web bend can be continuously corrected.

Further, the web warp generated in the welded H-section steel conveyed is measured on the downstream side, and based on the measurement result,
The web warp can be continuously corrected by moving the pair of horizontal rolls in the vertical direction to cancel the web warp while restraining the outer surfaces of the flanges with the pair of horizontal rolls.

Further, the squareness defect generated in the welded welded H-section steel is measured on the downstream side thereof, and based on the measurement result, the second straightening roll is tilted in the direction of canceling the squareness defect, thereby continuously You can correct squareness defect.
That is, by simultaneously moving the pair of vertical rolls, moving the pair of horizontal rolls, and tilting each horizontal roll, it is possible to continuously and simultaneously correct web bending, web warpage, and perpendicularity defect.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a shaped steel straightening machine and a continuous straightening apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. In the following embodiments, the shaped steel is welded H-shaped steel, and the welded H-shaped steel is transported in a transporting posture in which the flange is a horizontal surface.
explain.

FIG. 1 is an explanatory view schematically showing a production line equipped with a continuous straightening device 20 for welded H-section steel 22 incorporating a straightening machine 21 of this embodiment. As shown in the figure, in the production line provided with the continuous straightening device 20, the web material 22b and the two flange materials 22a are combined into an H-shaped cross section by rewinding the base material coils respectively. A high-frequency current is passed between the flange members 22a and 22a, and the melted web member 22b and the flange members 22a and 22a are welded by pressure welding with a pair of pressure rollers 23a and 23a.

The welded H-section steel 22 is pulled by the driving device 23b and conveyed to the first support stand 24, the straightening machine 21 and the second support stand 25 of the present embodiment, and the web bending generated in the welded H-section steel 22 is carried out. , Web warpage and squareness defects are corrected simultaneously and continuously.

On the first support stand 24, a pair of vertical rolls 24b for guiding the welded H-section steel 22 by contacting both end faces of the flanges 22a, 22a of the conveyed welded H-section steel 22 and being driven to rotate. , 24b, and a pair of horizontal rolls 24a, 24 for guiding the welded H-section steel 22 by coming into contact with the outer surfaces of the flanges 22a, 22a of the conveyed welded H-section steel 22 and being driven to rotate.
a and are installed. On the other hand, the second support stand 25 also comes into contact with both end faces of the flanges 22a, 22a of the welded H-section steel 22 being conveyed, and is driven to rotate, whereby the welded H-section steel 22
And a pair of horizontal rolls 25a for guiding the welded H-section steel 22 by contacting the outer surfaces of the flanges 22a, 22a of the conveyed welded H-section steel 22 and being driven to rotate. , 25a and. The rolls 24a, 24b, 25a and 25b are all fixed in installation position. Therefore, the first support stand 24 and the second support stand 25 allow the welded H-section steel 22 to move in the transport direction.
At two points that are separated from each other (in the horizontal direction on the drawing),
It is transported while being constrained and guided in the vertical and horizontal directions.

In this embodiment, the first support stand
For both 24 and the second support stand 25, existing ones were used. The straightening machine 21 of the present embodiment is installed at an intermediate position between the first support stand 24 and the second support stand 25 with respect to the transport direction of the welded H-section steel 22.

As described above, the vertical rolls 24b and 25b are guided and supported by the welded H-section steel 22 so as not to be displaced in the flange width direction, so that the welder H is welded by the straightener 21 to be described later.
The horizontal rolls 24a and 25a function as fulcrums for straightening the shaped steel 22, while the horizontal rolls 24a and 25a guide and support the welded H-shaped steel 22 so as not to be displaced in the web height direction. 21 functions as a fulcrum when straightening welded H-section steel 22.

The welded H-section steel 22 that has been straightened is
The product is conveyed to the cutting machine 26, cut into a predetermined length to be a product, and after inspection, shipped. FIG. 2 is a perspective view showing the orthodontic machine 21 in a disassembled state, partially transparent and simplified.

The straightening machine 21 of the present embodiment includes a first straightening roll stand 27 having a pair of vertical straight rolls 32a and 32b which are first straightening rolls, and a pair of horizontal rolls 51a and 51b which is a second straightening roll. Second straightening roll stand 28
And a straightening roll stand 29 composed of In Figure 2,
For convenience of explanation, the first straightening roll stand 27 and the second straightening roll stand 28 are shown in a separated state, but in reality, as shown in FIG. The straightening roll stand 29 is configured by being connected as shown in FIG.

In the following description, the first straightening roll stand
27 and the second straightening roll stand 28 will be described separately. First, the first straightening roll stand 27 will be described. [First Straightening Roll Stand 27] FIG. 3 is a front view of the first straightening roll stand 27 constituting the straightening machine 21 of the present embodiment.

The first straightening roll stand 27 includes a top plate 27a,
The bottom plate 27b and the two columns 27c and 27d form a frame. Although shown in a simplified manner in FIG. 2, as shown in FIG. 3, a shift motor mounting base 29a fixed to the second straightening roll stand 28 is installed in the vicinity of the column 27c. The shift motor 30 is mounted on the base 29a.

The first straightening roll mounting frame 31 comprising the columns 27a to 27d forming the first straightening roll stand 27 in the shape of a frame is slidably mounted on the columns 28e and 28f of the second straightening roll stand 28. To be done. The first straightening roll mounting frame 31 meshes with the output shaft of the shift motor 30 described above through a screw mechanism, and when the shift motor 30 is started, the extending direction of the output shaft (the left-right direction in FIG. 3). ), The first straightening roll stand 27 moves relative to the second straightening roll stand 28.

As shown in FIG. 3, the first straightening roll mounting frame 31 has a vertical roll 32a, which is a first straightening roll,
32b is paired and is pivotally supported.

The vertical rolls 32a and 32b both have a roll cylinder length longer than the maximum web height of the plurality of types of welded H-section steel 22 conveyed on the production line, and all of the welds are welded. The H-shaped steel 22 is brought into contact with four flange end faces. In addition, the vertical rolls 32a and 32b are not provided with a drive mechanism such as a drive motor, and the welded H-section steel to be conveyed is
It is a driven roll that rotates while touching 22.

The vertical roll 32a is rotatably supported by bearing boxes 33a and 34a, and the vertical roll 32b is rotatably supported by bearing boxes 33b and 34b. Thread the bearing boxes 33a and 33b from the center to both ends and screw shaft 35
Penetrates while meshing via a screw mechanism, while
The bearing shafts 34a and 34b penetrate through the screw shafts 36, which are provided with reverse screws, from their central portions toward both end portions while meshing with each other via a screw mechanism.

An output shaft of an opening / closing motor 37 mounted on an opening / closing motor mounting base 29b fixed to the bottom plate 27b is connected to the screw shaft 36. Further, the output shaft of the opening / closing motor 37 is connected to the screw shaft 35 via a chain sprocket 38.
In addition, in FIG. 2, the chain sprocket 38 is shown in order to facilitate understanding by simplifying the structure and showing the structure.
Is not described, but is modified so that the opening / closing motor 37 is directly connected to the screw shaft 35.

By starting the opening / closing motor 37, the bearing box 33a, the bearing box 34a, the bearing box 33b, and the bearing box 34b.
Respectively move in the same direction, and the bearing box 33a and the bearing box 33b, the bearing box 34a and the bearing box 34b move in opposite directions. That is, by rotating the opening / closing motor 37 in the forward direction and the reverse direction, the vertical rolls 32a and 32b increase and decrease the roll gap. As a result, in the first straightening roll stand 27, the welded H-section steel 22 is conveyed.
Even if the flange width is changed, it does not require a setup change such as a roll change, and always contacts the four flange end faces.

The roll gap between the vertical rolls 32a and 32b is set according to the thickness and width of the flange of the welded H-section steel 22 to be straightened. Vertical rolls 32a and 32b are moved in the flange width direction when the roll gap becomes large.
When the shift amount of a and 32b becomes large, while the roll gap becomes small, the flange is pinched and deformed when the flange width becomes wide due to the fluctuation of the flange width. Therefore, the roll gap between the vertical rolls 32a and 32b is appropriately set to a distance that does not hinder the correction of the web bending by applying a force equal to or higher than the yield point to the flange.

Thus, the left and right vertical rolls 32a, 32b
Is movable in the flange width direction while restraining the conveyed flange of the welded H-section steel 22 in the flange width direction. The 1st straightening roll stand which comprises the straightening machine 21 of this embodiment
27 is configured as described above.

[Second Straightening Roll Stand 28] FIG. 4 shows the second straightening roll stand 28 which constitutes the straightening machine 21 of this embodiment.
FIG. The first straightening roll stand 28 is a top plate 28.
a, the bottom plate 28b, and the four columns 28c to 28f
It is configured like a frame. Although a part of the description is omitted in FIG. 2 for easy understanding, as shown in FIG.
The first straightening roll stand 28 is equipped with a second straightening roll mounting frame 40 including a top plate 40a, a bottom plate 40b, and columns 40c to 40f. Then, the output shaft of the lifting motor 41 installed on the top plate 28a of the first straightening roll stand 28 penetrates the top plate 28a through the worm mechanism 42, and the top plate 40a of the second straightening roll mounting frame 40 is screwed to the top plate 40a. Are engaged through. By activating the lifting motor 41, the second straightening roll mounting frame 40 moves up and down with respect to the second straightening roll stand 28.

A worm mechanism 45 is fixed to the lower surface of the top plate 40a, and an input shaft of the worm mechanism 45 is mounted on a horizontal roll lifting motor mounting base 43 fixed to a second straightening roll mounting frame 40. Horizontal roll lifting motor
44 output shafts are connected. The output shaft of the worm mechanism 45 is connected to the upper horizontal roll holding plate 46 via a screw mechanism, and by activating the horizontal roll lifting motor 44, the upper horizontal roll holding plate 46 mounts the second straightening roll. It moves up and down with respect to the frame 40.

Worm mechanisms 47a and 47b are fixed to the lower surface of the upper horizontal roll holding plate 46. This worm mechanism 47a,
One of 47b has a right-handed screw type and the other has a left-handed screw type, and each input shaft is mounted on an upper horizontal roll tilting motor mounting base 48 fixed to a second straightening roll mounting frame 40. The output shaft of the upper horizontal roll tilting motor 49 is connected.

On the other hand, bearing boxes 50a and 50b are engaged with the output shafts of the worm mechanisms 47a and 47b.
The upper horizontal roll 51a is pivotally supported by 50b. In this embodiment, the bearing boxes 50a and 50b are tilted by the upper horizontal roll 51a.
Built-in self-aligning type bearing that can freely follow (angle change with respect to the horizontal plane).

As a result, the upper horizontal roll tilting motor 49
When the upper horizontal roll 51a is activated,
If it rises only by the same distance d, the other end will fall and the welding H
The central position A of the contact portion with the shaped steel 22 does not change. Similarly,
Worm mechanisms 47c and 47d are fixed to the bottom plate 40b. One of the worm mechanisms 47c, 47d is a right-handed screw type and the other is a left-handed screw type.
The output shaft of the lower horizontal roll tilting motor 53 mounted on the lower horizontal roll tilting motor mounting base 52 fixed to the second straightening roll mounting frame 40 is connected.

On the other hand, bearing boxes 50c and 50d are engaged with the output shafts of the worm mechanisms 47c and 47d.
The lower horizontal roll 51b is pivotally supported by 50d. In this embodiment, the bearing boxes 50c and 50d incorporate self-aligning type bearings that can freely follow the tilting movement of the lower horizontal roll 51b.

As a result, the lower horizontal roll tilting motor 53
When the lower horizontal roll 51b is activated,
If it rises only by the same distance d, the other end will fall and the welding H
The central position B of the contact portion with the shaped steel 22 does not change.

In this embodiment, although omitted in FIG. 2, as shown in FIG. 4, the supporting members 54a to 54d are attached to the holding plates 46a and 46b engaged with the upper horizontal roll holding plate 46, and the horizontal planes are attached. , The web restraining horizontal rolls 55a to 55d on the discs are rotatably engaged with the discs 55a and 55b and abut against the web of the welded H-section steel 22 by the supporting members 54a and 54b.
Is rotatably supported.

The web restraining horizontal rolls 55a and 55b move up and down in association with the vertical movement of the horizontal roll 51a, that is, the vertical movement of the second straightening roll mounting frame 40 with respect to the second straightening roll stand 28, but their mutual positions change. In order to prevent the upper and lower horizontal rolls 51a and 51b from tilting, the upper horizontal roll holding plate 46, which holds the worm mechanisms 47a to 47d in a fixed manner, is engaged.
It has a mechanism that can be adjusted according to the web thickness of the web restraining horizontal rolls 55a and 55b and the gap between the web restraining horizontal rolls 55c and 55d, and is driven in the horizontal plane while contacting the web. Rotate.

Similarly, the supporting members 54c and 54d are engaged with the lower horizontal roll tilting motor mounting base 52,
The web restraint horizontal rolls 55c and 55d are rotatably abutted on the web of the H-section steel 22 by the supporting members 54c and 54d engaged with the 52a and 52b.

Even when the upper and lower horizontal rolls 51a and 51b are tilted, the horizontal positional relationship between the web-constraining horizontal rolls 55a and 55b and the web-constraining horizontal rolls 55c and 55d.
There is no difference in the horizontal positional relationship.

Thus, the upper and lower horizontal rolls 51a, 51b
Is movable in the web height direction while restraining the flange of the welded H-section steel 22 in the web height direction and tiltable with respect to the outer surface of the flange.

In this embodiment, the horizontal rolls 51a,
The roll cylinder length of 51b is set to be larger than the maximum flange width of the welded H-section steel 22 to be conveyed. As a result, the horizontal rolls 51a and 51b do not require roll replacement,
It is brought into contact with the outer surface of the flange of all the welded H-section steel 22 being conveyed.

Further, in this embodiment, since the welded H-shaped steel 22 is pulled and driven, the upper and lower horizontal rolls 51a and 51b and the left and right vertical rolls 32a and 32b are both driven rotary type having no drive mechanism. Is a roll of. Therefore, synchronization control of the transport mechanism and the roll drive mechanism, synchronization control of each roll, and the like are not required, and an increase in equipment cost is suppressed in combination with not providing the drive mechanism.

The second straightening roll stand 28 constituting the straightening machine 21 of this embodiment is constructed as described above. Figure 5
FIG. 3 is a side view of the straightening machine 21 of the present embodiment. As shown in FIGS. 1 and 5, the first straightening roll stand 27 is a second straightening roll stand 27 with respect to the conveyance direction of the welded H-section steel 22.
It is located upstream of 28.

In this embodiment, the first straightening roll stand
27 is two columns 28e and 28 of the second straightening roll stand 28.
It is housed in a rectangular protrusion 28e 'formed on the front surface of f.
Then, a rectangular frame-shaped pressing plate 60 is fastened and fixed to the tip end surface of the rectangular protrusion 28e ′ by a bolt 61. As a result, the first straightening roll stand 27 is parallel to the second straightening roll stand 28 in the flange width direction of the welded H-section steel 22 being conveyed (direction orthogonal to the paper surface in FIG. 5).
It is installed so that it can be freely moved to. Further, the structure of the straightening roll stand 29 configured by the first straightening roll stand 27 and the second straightening roll stand 28 is simplified, and an increase in manufacturing cost is suppressed.

As described above, the straightening machine 21 of the present embodiment is as follows.
Composed. FIG. 6 is an explanatory view showing the main part of a continuous straightening device 20 incorporating the straightening machine 21 of this embodiment.
6A is a side view, and FIG. 6B is a top view.

As shown in FIGS. 6 and 1, this straightening machine
A squareness defect detector 61 is provided on the downstream side of the second support stand 25 on the downstream side of the second support stand 25, and a web bending detector 62 and a web warpage detector 63 are provided on the downstream side of the cutting device 26. It is provided.

The detected value of the web bend by the web bend detector 62 is input to the web bend control device 64, the detected value of the web warp by the web warp detector 63 is input to the web warp control device 65, and the squareness defect is further detected. The detection value of the squareness defect by the detector 61 is input to the squareness controller 66, respectively.

Then, from the web bending control device 64 to the first
A control signal is output to the vertical rolls 32a and 32b, which are straightening rolls, to control the shift position of the vertical rolls 32a and 32b in the flange width direction. Also, the web warp control device 65
Also, a control signal is output from the squareness control device 66 to the horizontal rolls 51a and 51b which are the second straightening rolls, and the up-and-down position of the upper horizontal roll 51a and the tilt amounts of the upper and lower horizontal rolls 51a and 51b are controlled.

Any known detector may be used as the squareness defect detector 61, the web bending detector 62, and the web warp detector 63, and the detectors are not limited to specific types.

As described above, in the present embodiment, on the downstream side of the straightening machine 21, the bending of the web, the warp of the web, and the defect of the perpendicularity are detected, and based on the detection results, in the flange width direction of the vertical rolls 32a, 32b. Correct the web bending by automatically controlling the shift position of the
The warp of the web is corrected by automatically controlling the ascending / descending positions of the 51a and 51b, and the perpendicularity defect is corrected by automatically controlling the tilt amount of the horizontal rolls 51a and 51b.

As a result, even when the web is bent, the web is warped, and the perpendicularity is defective, the correction work can be performed quickly and accurately. Next, a situation in which the web straightening device 20 incorporating the straightening device 21 corrects a web bend, a web warp, and a perpendicularity defect will be described with reference to the accompanying drawings together with the operation.

[Web Bending] FIG. 7 is a top view showing a main part of a continuous straightening device 20 incorporating the straightening device 21 of the present embodiment, and FIG. 7 (a) is a diagram showing a case where a right bend is generated. 7
(b) shows the case where left turn occurs.

In FIG. 7A, the web bend detector 62
The right curve of the web shown by the broken line in the figure is welded H-section steel.
When detected by 22, the web bending control device 64 calculates the degree of bending that can eliminate the right bending of the web, and the shift motor 30 is operated based on the calculation result.
Is calculated, and a control signal is output to the shift motor 30. As a result, the shift motor 30 is started and the vertical rolls 32a and 32b are kept in contact with the four flange end faces,
The vertical rolls 32a and 32b are automatically shifted in the direction in which the right turn is canceled, that is, in the right direction of the flange width shown by the solid line. The shift motor 30 is controlled so that it can be moved by a preset amount according to the size of the welded H-section steel 22. Further, after confirming that the straightened portion has moved to the detector 62 by a measuring machine (not shown), the bending is measured again and controlled. In this way, the right-handed bending of the web is corrected by repeatedly performing the bending measurement and the correction.

Further, in the case of the left turn of the web shown in FIG. 7 (b), it is opposite to the case of the right turn of the web shown in FIG. 7 (a), and the vertical rolls 32a and 32b are shifted in the opposite directions, and the web left side is shifted. The bend is corrected.

[Web Warp] FIG. 8 shows the straightening machine of this embodiment.
It is a side view which shows the principal part of the continuous straightening apparatus 20 incorporating 21. FIG.8 (a) shows the case where an upward warp occurs, and FIG.8 (b) shows the case where a downward warp occurs, respectively.

In FIG. 8A, when the web warp detector 63 detects the web warp indicated by the broken line in the drawing in the welded H-section steel 22, the web warp can be eliminated. The degree is calculated by the web warp control device 65, the control amount of the lifting motor 41 is calculated based on the calculation result, and a control signal is output to the lifting motor 41. As a result, the lifting motor 41 is activated and the horizontal rolls 51a and 51b are
The horizontal roll 51a
, 51b are automatically shifted upward in the shape 22 'shown by the solid line. The control amount of the lifting motor 41 is preset according to the size of the welded H-section steel 22. Thereafter, as in the case of the above-described bending correction, the warp measurement and the correction are repeated to correct the web warp.

The case of the web warp shown in FIG. 8 (b) is the opposite of the case of the web warp shown in FIG. 8 (a).
The horizontal rolls 51a and 51b are shifted downward to correct the web warp.

[Defective Squareness] FIG. 9 shows a straightening machine according to this embodiment.
Horizontal roll 51a in continuous straightening device 20 incorporating 21
Fig. 9 (a) is a front view showing the tilting state of the upper flange, and Fig. 9 (a) shows a case where a right downward perpendicularity defect occurs in the upper flange, and Fig. 9 (b) shows a left downward downward perpendicularity defect in the upper flange. The respective cases are shown below.

In FIG. 9 (a), the squareness defect detector 61 indicates that the squareness defect in the lower right direction shown in the figure is a welded H-section steel.
When detected by 22, the degree of tilting of the horizontal roll capable of eliminating this squareness defect is calculated by the squareness controller 66, and the control amount of the upper horizontal roll tilting motor 49 is calculated based on this calculation result. Is calculated and a control signal is output to the upper horizontal roll tilting motor 49. As a result, the upper horizontal roll tilting motor 49 is activated, and the horizontal roll 51a is automatically tilted to the lower left while the horizontal roll 51a is in contact with the outer surface of the upper flange. The upper horizontal roll tilting motor 49 is
It is controlled to a preset value according to the dimensions of the welded H-section steel 22. Hereinafter, as in the case of the straightening correction described above, by repeating the measurement of the squareness defect and the correction, the squareness defect on the lower right side of the upper flange is corrected.

Further, in the case of a right angled squareness defect shown in FIG. 9 (b), which is the opposite of the case shown in FIG. 9 (a), the horizontal roll 51a is tilted downward to the right and the upper flange is lowered to the left. Squareness defect is corrected.

With respect to the lower flange as well, the squareness defect is corrected in the same manner as the upper flange. Thus, according to the continuous straightening device 20 incorporating the straightening machine 21 of the present embodiment, the effects listed below can be obtained.

(1) The web bending, web warpage and squareness defect generated in the welded H-section steel 22 can be corrected simultaneously and continuously by adding a single piece of equipment, the straightening machine 21. it can.

(2) Correction can be performed by automatic control using a known detector, and the judgment and method for correction are extremely simple. (3) The vertical rolls 32a and 32b and the horizontal rolls 51a and 51b are
In either case, since the roll gap can be freely changed, straightening can be performed without being affected by changes in the outer dimensions and plate thickness of the welded H-section steel 22.

(4) Horizontal roll 51a for straightening
Even when the 51b is tilted, the distance between the centers of the horizontal rolls 51a and 51b in the roll cylinder length direction does not change, and therefore an excessive compressive load is not applied to the web.

(5) Vertical rolls 32a and 32b and horizontal roll 51
By setting the roll lengths of a and 51b to be at least the maximum dimensions of the welded H-section steel 22 being transported,
Even if the dimension of 22 changes, there is no need to perform roll replacement (setup change), which can reduce the man-hours required for roll replacement (that is, line stop time) and the number of rolls held. It is possible to reduce the roll cost.

(6) When the two support stands 24 and 25 are already installed, the straightening device 21 of the present embodiment is installed between these support stands 24 and 25, so that the continuous straightening device 20
Can be configured. Therefore, the equipment cost is low. In addition, the continuous straightening device including the two support stands 24 and 25
Even when the 20 is newly installed, since the roll tilting mechanism and the shift mechanism are not required for the two support stands 24 and 25, an increase in equipment installation cost can be suppressed.

(7) Even if the web is bent to the left and right, the web is warped up and down, and the squareness defect is generated at any position and in any direction of the four flanges. , Without changing the conveyance posture of the welded H-section steel 22,
Can be corrected immediately.

(8) The straightening principle is based on the simplest straightening principle of canceling the web bending by imparting a strain to the flange at a yield point or higher, so that the defect does not get confused by other factors. Adjustment at the time of occurrence can be performed easily and surely.

(9) Since the straightening machine 21 has a simple apparatus configuration and adjustment method, it is easy to quantify the adjustment allowance by measuring the values of web bending, web warpage and squareness defect, and therefore automatic control is required. Easy to plan.

(10) Vertical rolls 32a and 32b and horizontal roll 51
Since a and 51b are all driven rolls that are driven to rotate by being in contact with the welded H-section steel 22 being conveyed, there is a motor for driving or a speed synchronization mechanism with the conveyance mechanism of the welded H-section steel 22. No need at all. Therefore, the configuration is simplified and the equipment cost is low.

[0096]

EXAMPLES Further, the straightening machine according to the present invention will be described more specifically with reference to examples.

As shown in FIG. 1, a straightening machine 21 according to the present invention having the structure and operation shown in FIGS. 2 to 9 is used for producing an existing welded H-section steel 22 (first support stand 24 and second support stand 24). Installed at a distance of 1.5 m) from the support stand 25, 3 types of welding H
Shaped steel 22 (100 x 60 x 3.2 x 4.5, 250 x 125 x 4.5 x 6.0
, 400 × 200 × 4.5 × 9.0) web bending,
Web warpage and squareness defects were straightened simultaneously at the same time. The results are shown graphically in FIG.

FIG. 10 (a) is a graph showing the relationship between the shift amount of the vertical rolls 32a and 32b and the web bending correction amount. FIG. 10 (b) is the vertical movement amount of the horizontal roll 51a and the web bending correction amount. FIG. 10 (c) is a graph showing the relationship with FIG.
6 is a graph showing the relationship between the tilt amount of the horizontal roll 51a and the squareness defect correction amount.

The solid line on the horizontal axis in each graph represents a practically sufficient correction range. As shown in FIGS. 10 (a) to 10 (c), it can be seen that the continuous straightening device 20 incorporating the straightening machine 21 according to the present invention has obtained the straightening ability with no problem in practical use. .

[0100]

[Modification] In the above description of the embodiments and examples,
Although the case where the shaped steel is welded H-shaped steel is taken as an example, the present invention is equally applicable not only to welded shaped steel but also to rolled shaped steel. Further, the present invention is equally applicable not only to H-section steel but also to other section steels having a flange and a web (channel steel, I-section steel, etc.).

In the above description of the embodiments and examples, the case where the welded H-section steel is straightened before being cut to a predetermined length is taken as an example, but after being cut to a desired length. It can also be applied to the welded H-section steel.

In addition, as introduced in the embodiments and examples,
The roll gap adjusting mechanism, the moving mechanism, the tilting mechanism and the like of each of the first straightening roll pair and the second straightening roll pair are merely examples, and the present invention is not limited to these mechanisms. Known mechanisms used for this type of mechanism are:
All are applicable to the present invention.

In the embodiment, the straightening machine 21 is welded to the welding H.
With respect to the conveying direction of the shaped steel 22, the first support stand 24 and the second
Although it is arranged at the midpoint position with respect to the support stand 25, it is not always required to be at the midpoint position and may be arranged between the first support stand 24 and the second support stand 25.

Further, the means for measuring the defective shape of the shaped steel may be a known means, and the specific means is not limited at all.
Further, in the embodiment, in each of the straightening machine 21, the first support stand 24, and the second support stand 25, a welded H-section steel is used.
The case where the vertical roll is installed on the downstream side of the horizontal roll with respect to the transport direction of 22 has been described as an example, but the present invention is not limited to this mode and may be reversed.

Further, in the embodiment, each roll is a driven roll, and the welded H-section steel 22 is conveyed by a drive device as an example. However, when such a drive device is not provided,
Each roll may be a drive roll.

Further, in the description of the embodiments, the case where the welded H-section steel is conveyed in the conveying posture in which the flange is in the horizontal plane is taken as an example, but the present invention is not limited to this mode, and the web is in the horizontal plane. The same applies to the case where the welded H-section steel is conveyed in the following conveyance postures. In this case, the first straightening roll may be a horizontal roll and the second straightening roll may be a vertical roll.

Further, the present invention is equally applicable to the case where the welded H-section steel is conveyed in a conveyance posture other than the conveyance posture in which the flange is in the horizontal plane and the conveyance posture in which the web is in the horizontal plane. In this case, the first straightening roll and the second straightening roll may be arranged so as to be tilted according to the conveyance posture of the welded H-section steel.

[0108]

As described in detail above, according to the present invention, the bending of the web of the H-shaped steel or the like, the warp of the web, and the poor squareness can be achieved by adding a single equipment called the straightening machine 21. All were able to be corrected simultaneously and continuously.

More specifically, according to the present invention, the judgment of adjustment and the method are simple, and it is not affected by the plate thickness variation of the section steel,
It was possible to provide a shaped steel straightening machine that does not apply an excessive load to the web, requires a small number of man-hours for setup change, has a low equipment cost, and has a small number of rolls. The practical significance of the present invention having such an effect is extremely remarkable.

[Brief description of drawings]

FIG. 1 is an explanatory view schematically showing a production line equipped with a continuous straightening device for welded H-section steel incorporating a straightening machine of an embodiment.

FIG. 2 is a perspective view of the orthodontic machine according to the embodiment in a disassembled state, partially transparent and simplified.

FIG. 3 is a front view of a first straightening roll stand that constitutes the straightening machine of the embodiment.

FIG. 4 is a front view of a second straightening roll stand that constitutes the straightening machine of the embodiment.

FIG. 5 is a side view of the straightening machine according to the embodiment.

FIG. 6 is an explanatory view showing a main part of a continuous straightening device incorporating the straightening device of the embodiment, FIG. 6 (a) is a side view, and FIG.
(b) is a top view.

FIG. 7 is a top view showing a main part of a continuous straightening device incorporating the straightening device of the embodiment. FIG. 7 (a) shows a case where a right bend occurs and FIG. 7 (b) shows a left bend. Each case is shown.

FIG. 8 is a side view showing a main part of a continuous straightening device incorporating the straightening device of the embodiment. FIG. 8 (a) shows a case where an upward warp occurs and FIG. 8 (b) shows a downward warp. Each case is shown.

9 is a front view showing the tilting state of the horizontal roll in the continuous straightening device incorporating the straightening device of the embodiment.
9A shows a case where a right-down squareness defect occurs on the upper flange, and FIG. 9B shows a case where a left-down squareness defect occurs on the upper flange.

10 is a graph showing the results of Examples, and FIG.
Is the relationship between the vertical roll shift amount and the web curl straightening amount, Fig. 10 (b) is the relationship between the horizontal roll up / down amount and the web warp straightening amount, and Fig. 10 (c) is the horizontal roll amount. The relationship between the tilt amount and the squareness defect correction amount is shown.

FIG. 11 is an explanatory view showing a straightening machine proposed by Japanese Patent Publication No. 2-50812.

FIG. 12 is an explanatory view showing a straightener proposed by Japanese Utility Model Publication No. 6-9754.

13 is an explanatory view of a straightener proposed by Japanese Patent Publication No. 8-29350, FIG. 13 (a) is a side view, and FIG.
FIG. 13B is a view on arrow AA in FIG.

[Explanation of symbols]

20 Continuous straightening device 21 straightening machine 22 Welded H-section steel 24 First support stand 25 Second support stand 32a, 32b vertical roll (first straightening roll) 51a, 51b Horizontal roll (second straightening roll) 29 Straightening roll stand

Claims (2)

(57) [Claims] 1. Abutting on an end surface of a flange of a shaped steel being conveyed.
Thus , the pair of first straightening rolls are movable in the flange width direction while restraining the flange in the flange width direction, and are movable in the web height direction while restraining the flange in the web height direction. And a pair of second straightening rolls that are tiltable with respect to the outer surface of the flange, a pair of the first straightening rolls, and a pair of the second straightening rolls are mounted separately from each other in the conveying direction of the shaped steel. A straightening machine for shaped steel, which is provided with a straightening roll stand. 2. The straightening machine for the shaped steel according to claim 1, and the straightening machine for the shaped steel, which is arranged on the upstream side and the downstream side of the straightening machine with respect to the conveying direction, respectively, and the shaped steel is stretched in the flange width direction and the web height direction. A continuous straightening device for a shaped steel, comprising: a first support stand and a second support stand which are restrained in relation to each other.