JP2014087815A - Strain correction device of welding shape steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strain correction device and a method of welding shape steel for executing a right-angle correction and the optional angle formation, without causing a coil break, when correcting an angle between a flange and a web of the welding shape steel.SOLUTION: The welding shape steel 100 is formed by vertically welding the web 102 to a main surface of the flange 101, and comprises a receiving part 300 for correcting the strain caused in the flange 101 and abutting on an under surface of the flange 101 and a pair of flange correction parts 500 arranged in both-side positions of the welding shape steel 100 via the web 102, and the flange correction part 500 comprises s correction tool 510 for adding correction force to the flange 101 by abutting on an upper surface of the flange 101, a lever 520 rocking around a fulcrum of the middle and arranging the correction tool in a tip part and a lever driving device 523 for driving the lever 520.

Description

  The present invention relates to a distortion straightening apparatus for welded steel.

  As this type of technology, for example, there is one described in Patent Document 1. This device includes a correction device main body and a carry-in conveyor and a carry-out conveyor for correction members arranged before and after the correction device main body, and the correction device main body is supported on the front end side of the left and right upper roll support frames, respectively. The straightening member is inserted between the upper roll and the lower roll, and the lower roll is elevated and pressurized by a hydraulic cylinder to correct the distortion of the straightening member.

  Web guide rolls that hold and guide the lowermost end of the web of the straightening member are arranged on the front and rear sides of each of the left and right upper rolls in the loading direction of the straightening member. It is provided freely and ascending and descending. In front of each web guide roll, a carry-in conveyor and a carry-out conveyor are provided so as to be able to move up and down, and the correction member is carried horizontally from the carry-in conveyor to the correction device body, and the correction member is placed horizontally from the correction device body to the carry-out conveyor. The web of the straightening member is held by the web guide roller at the lowermost end of the straightening member, thereby reducing the angle of the web after the straightening as much as possible.

  Further, in the transfer type distortion correcting device described in Patent Document 2, the guide roller (corresponding to the upper correcting roller) has a mortar shape and is always perpendicular to the web and the contact surface that is always horizontal to the flange. The web and the flange are always straightened and straightened at right angles while the flange is flattened by the crowned presser roller and the guide roller, which are installed directly below the guide roller.

  Moreover, there exists what is described in patent document 3 in invention of the same kind.

JP 2003-33817 A Patent No. 575726 Patent No. 2914956

  In patent document 1, the web guide roll which hold | maintains a web is arrange | positioned as close to a flange as possible, and the web is prevented from bending by hold | maintaining a web in the position near a flange. However, the lower position of the roller that holds the web vertically is a position away from the lower end position of the web at the initial stage of correction due to the weld leg length and the amount of umbrella bend.

  For this reason, by moving up and down the carry-in conveyor and the carry-out conveyor, the roller that holds the web vertically is arranged as close to the weld leg length as possible, and the distance between the roller that holds the web vertically and the lower end position of the web The web has been shortened to prevent the web from breaking, but the web tilt angle could only be reduced as much as possible.

  In Patent Document 2, a guide roller that corrects H-steel with a large weld leg length (a roller that has a large chamfer so that it does not hit the welded portion and corresponds to a straightening upper roller) is provided to correct H-steel with a short weld leg length. When doing so, the distance between the lowermost holding position where the guide roller holds the web and the welded portion increases, so that when the amount of umbrella folding between the flanges is greatly different on the left and right, the web is folded back.

  For this reason, it is necessary to replace the guide roller (equivalent to the straightening roller) for each H steel with a different weld leg length. In practical terms, it is not suitable for straightening various types of H steel with different weld leg lengths. It could only be used when straightening H steel.

  In view of the above-mentioned problems, a method of correcting the flange and the web at right angles and causing the web to be bent is not considered, and a method of pressing the guide roller (corresponding to the correction upper roller) up and down can be considered. However, when the guide roller (corresponding to the upper roller for correction) and the pressure source (hydraulic cylinder) are integrated, the overall height of the device becomes large and it becomes impossible to correct H steel (having high processing frequency) with a small web height. Problems arise in practical use. Further, the structure in which the shaft of the guide roller (corresponding to the upper straightening roller) is fixed and the frame of the straightening machine is moved up and down has not been put into practical use because the straightening machine itself becomes large and there is a problem in maintaining accuracy.

  For this reason, one problem of the present invention is that a corrector that applies a correcting force to the flange can be operated independently with respect to the left and right flanges, and the height of the corrector (roller) is lowered, and the upper and lower positions thereof Can be set arbitrarily, even when the umbrella folding distortion of the flange is greatly different on the left and right, and the height of the outer sides of the left and right flanges is different, the corrective force is simultaneously applied to the left and right flanges from the initial stage of correction. Another object of the present invention is to provide a distortion correcting device that can reduce the hip folding force applied to the web due to the flange correction.

  In addition, the force that causes the wave to be folded in the left direction and the force that causes the wave to be folded in the right direction acts on the wave, and the difference between these forces becomes the hip folding force that causes the wave to be folded in either the left or right direction. It is an object of the present invention to provide a strain correction device that can prevent the occurrence of hip breakage by applying the corrective force to the left and right flanges at the same time, excluding the cause of the hip breakage of one side that occurs in the initial stage and the cause of hip breakage.

  Next, in Patent Document 2, the web is held vertically by a guide roller (corresponding to an upper correction roller), and the flange is flattened by a pressing roller with a crown and a guide roller (corresponding to an upper correction roller) at the same position. doing. However, if the flange bending distortion (inclination relative to the horizontal direction perpendicular to the web) is equal on the left and right, or if there is a slight difference, the web and the flange can be corrected at right angles. When the strains differed greatly from left to right, the web and flange could not be corrected at right angles. This seems to be the effect of springback (deformation due to reaction force).

  That is, in Patent Documents 1 and 2, since it is only possible to apply a straightening force equal to the left and right flanges, and it is not possible to load a different straightening force to the left and right flanges depending on the magnitude of the distortion, the web is placed vertically. When the flange bending distortion of the flange is greatly different on the left and right in the state of holding it, if the correction force is applied so that the flange and the web are perpendicular to the side where the umbrella folding distortion is small, the correction force is insufficient on the side where the umbrella bending distortion is large The angle between the flange and the web is within a right angle without the flange and the web being at a right angle. Also, if a corrective force is applied so that the flange and web are at a right angle on the side where the umbrella folding distortion is large, the angle between the flange and the web will not be perpendicular due to excessive correction force on the side where the umbrella folding distortion is small Becomes more than right angle. In other words, if the bending distortion of the flange is significantly different on the left and right, the perpendicularity between the left and right flanges and the web can be corrected as much as possible due to the springback that occurs after the correction force is removed. The defective product after correction had to be corrected by heat treatment.

  For this reason, another problem of the present invention is that the pressing amount of each corrector that applies a correction force to the left and right flanges is independent from each other in consideration of the umbrella folding distortion and the spring back of the left and right flanges. It is to provide a distortion correction device that can be set by the user.

  Next, welded T-shaped steels used for bridges, etc. are used to correct umbrella bending distortion, which is distortion caused by welding, straightness correction after correcting umbrella bending distortion, and correction of longitudinal bending distortion in the longitudinal direction of the web. is necessary.

  At present, these corrections are performed in separate correction processes. 1. a leveling process for leveling the left and right flanges horizontally; Bending correction process to correct longitudinal bending distortion in the longitudinal direction of the web by rolling the flange using a cylindrical roller that is in contact with the lower surface of the flange 2. There is a method by cooling). It was necessary to perform an angle correction process for correcting the angle of the left and right flanges to the web at a right angle by heating and cooling a portion near the flange of the wave.

For this reason, the other one subject of this invention is providing the distortion correction apparatus which can perform a horizontal correction process, a bending correction process, and an angle correction process by one process.
Next, in the H-shaped steel used for bridge girders, there is a problem that rainwater accumulates on the part exposed to rain corresponding to the outer surface of the bridge and corrosion occurs, and as a countermeasure, the flange may be inclined downward. is there. However, since the conventional configuration corrects the right angle based on the angle between the web and the flange, the angle between the web and the flange cannot be corrected to an arbitrary angle.

  When using a straightening device with a conventional configuration to incline the flange in a downward slope, the end face of the wave to be welded to the flange is formed on the inclined face, and the web is welded to the flange at the inclined end face. In order to correct the inclination angle, a method of correcting by heating and cooling the lower end of the web is used.

  For this reason, another problem of the present invention is that distortion in which one of the left and right flanges is corrected at right angles to the web and the other flange can be inclined at an arbitrary downward slope angle in one process. It is to provide a correction device.

  In order to solve the above-mentioned problems, the distortion correction apparatus for welded steel according to the present invention corrects distortion generated in the flange in welded steel obtained by welding a web perpendicularly to the main surface of the flange. It includes a receiving portion that abuts, a web guide portion that holds the web in a vertical posture, and a pair of flange straightening portions that are disposed on both sides of the welded steel via the web. The flange straightening portion touches the upper surface of the flange. It has a correction tool that touches and applies a correction force to the flange, a lever that swings around a middle fulcrum and that has the correction tool arranged at the tip, and a lever driving device that drives the lever under pressure. .

The distortion correction apparatus for welded steel according to the present invention includes a web guide portion that holds the web in a vertical posture.
In the distortion correction apparatus for welded steel according to the present invention, the flange correction section includes a fulcrum holding section that holds the fulcrum of the lever so that the position of the fulcrum can be adjusted vertically.

In the distortion correction apparatus for welded steel according to the present invention, the fulcrum holding part has a fulcrum drive device that moves the fulcrum of the lever up and down.
In the weld-type steel distortion correction device of the present invention, the flange correction unit has a control unit that controls the lever driving device, and the control unit corrects the amount of pressure applied by the correction tool applied to the flange by the lever driving device. It is characterized in that it is set in consideration of the spring back that will be generated later on the flange.

  In the distortion correction apparatus for welded steel according to the present invention, the receiving portion has a lower correction jig that can contact the lower surface of the flange, and the flange is corrected by the correction tool of the flange correction portion and the lower correction jig. And

  With the above-described configuration, when correcting distortion of welded steel, the corrector placed at the tip of the lever of the flange straightening part placed on both sides of the web is placed above the flange and above the receiving part. Insert the welded steel and place the flange between the receiving part and the straightening tool of the flange straightening part, abut the lower surface of the flange against the receiving part, and guide the web guide part placed on both sides of the web. In the state where the web is held vertically by contacting the lower end of the side of the steel sheet, the lever drive device applies a correction force to the flange to correct it. After correction, the welded steel is fed in the direction of the web axis, and the flange is centered on the web. Straighten across the entire length of the direction and at an appropriate angle to the web.

  Therefore, according to the present invention, the lever is independently swung in the flange correction portions on both sides of the web, and the correction tool is moved up and down by the lever principle to load the flange with a correction force. Even in the case where the angle between the flange and the web is different, the correction tools can be simultaneously brought into contact with both sides of the flange to simultaneously apply the correction force to both sides of the flange. Therefore, the angle of the wave and the flange can be corrected to the same angle or a preferred angle on the left and right sides of the wave without folding the waist.

  In addition, by setting the pressure pressing amount of the correction tool applied to the flange by the lever driving device in consideration of the spring back generated in the flange after the correction operation, it can be corrected to an accurate squareness or a desired angle. Further, when the welded steel enters the receiving portion, the receiving roller supports the lower surface of the flange, so that the guide of the web guide portion can hold the web in the vicinity of the weld leg length between the flange and the web. The resistance against hip breakage is increased, and hip breakage can be prevented.

  In the configuration in which the upper roller is fixed and the lower roller is moved and pressed as in Patent Document 1, even if the front and rear conveyors are moved up and down to insert the H steel horizontally, the flange is folded at the initial stage of correction. Considering the amount and the push-in amount according to the spring back amount after the final pressurization, the web holding roller must be held far from the weld leg length.

  Furthermore, in the present invention, since the right and left correction tools are simultaneously in contact with the corresponding flanges, the correction force is simultaneously applied to both flanges, so the difference between the correction forces acting on the left and right flanges is the force that causes the web to bend. . Therefore, as compared with the conventional case where the correction force acts only on one of the flanges, the force that causes the hip breakage is reduced and the occurrence of the hip breakage can be prevented.

  Next, the web guide unit holds the web in a vertical posture, and the corrective force (for example, a roller) is applied to the flange with a lever driving device via a correction tool (for example, a roller) so that the flange is inclined at a predetermined angle with respect to the web. The welded steel is fed out in the web axis direction while correcting or after correction, and the flange is corrected to the predetermined angle over the entire length in the web axis direction.

  Therefore, according to the present invention, the flange can be corrected to a predetermined angle over the entire length in the web axis direction, the flange can be formed to be inclined at an arbitrary angle with respect to the web, and the rain gradient of the bridge can be easily corrected.

  Next, the web is held in a vertical position by guide tools (eg, rollers) on both the left and right sides, and a part of the correction tool (eg, roller) located inside the curved web is inclined to the flange surface of the flange. While pressing the flange with the lever drive device through the corrector while in contact with the web, the welded steel is fed out in the web axial direction by the receiving roller of the receiving portion, and the contact of the flange that contacts the corrector (eg roller) The web is straightened along the axial direction of the web by rolling the contact portion, that is, the side of the weld leg length.

  Therefore, according to the present invention, only the flange on one side is extended by rolling the abutting portion of the flange that abuts the correction tool (eg, roller) inside the curved web, and the web is opposite to the curved warping direction. It is possible to straighten the welded steel by correcting the direction, and by adjusting and setting the pressure applied by the correction tool (eg, roller) and the receiving roller of the receiving part, the horizontal correction process, the bending correction process and the angle The correction process can be performed in one process.

The schematic diagram which shows an example of the distortion correction apparatus of the weld type steel in embodiment of this invention The top view which shows the distortion correction apparatus in the embodiment The schematic diagram which shows the procedure of the correction operation in other embodiment of this invention The schematic diagram which shows the procedure of the correction operation in the embodiment The schematic diagram which shows the procedure of the correction operation in the embodiment The schematic diagram which shows the procedure of the correction operation in other embodiment of this invention The schematic diagram which shows the procedure of the correction operation in other embodiment of this invention The schematic diagram which shows the procedure of the correction operation in other embodiment of this invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a welded steel 100 is obtained by welding a web 102 vertically to a side surface of a flange 101, and an H-shaped steel is illustrated in the present embodiment.

  The distortion correction apparatus 200 corrects distortion generated in the flange 101 in the welded steel 100, and includes a main body frame 201, a receiving part 300, a web guide part 400, and a flange correction part 500 on both sides, as shown in FIG. As described above, the front conveyance device 610 and the rear conveyance device 620 are arranged at the front and rear positions of the distortion correction device 200.

  The front conveyance device 610 and the rear conveyance device 620 have a conveyance track whose conveyance direction is the material axial direction of the welded steel 100, here, the axial direction of the web 102, and the front conveyance device 610 is on the upstream side in the conveyance direction. The post-conveying device 620 is located downstream in the conveying direction.

  The receiving part 300 has a receiving roller 310 that contacts the lower surface of the flange 101, and the receiving roller 310 rotates around the axis of a rotating shaft 311 arranged in a direction orthogonal to the conveying direction of the welded steel 100, thereby Sends in the direction of the web axis. The rotating shaft 311 is rotatably held by bearings 312 disposed on both sides of the receiving roller 310, and one end side of the rotating shaft 311 is connected to the receiving roller driving device 313.

  At least a pair of the web guide portions 400 are arranged at positions before and after the flange correction portion 500 along the web axial direction. Each web guide portion 400 is configured such that at least a pair of web guide rollers 410 and at least a pair of flange guide rollers 411 are arranged on both sides of the welded steel 100 via the web 102, and the web guide rollers 410 are on the side surface of the web 102. And a flange guide roller 411 abuts against the side end surface of the flange 101. Each web guide unit 400 holds the web 102 in a vertical posture by sandwiching the lowermost side of the web 102 with the web guide roller 410.

  A plurality of web guide rollers 410 and flange guide rollers 411 are arranged along the conveying direction of the welded steel 100, and the web guide unit 400 integrally connects the plurality of web guide rollers 410 with the axis direction of the web 102. Guide roller moving means (not shown) that moves in the direction of the web 102 and the height of the web 102, and the guide roller moving means includes a mechanical moving means using a hydraulic cylinder or a screw, etc. Description is omitted.

  The flange straightening unit 500 is disposed on both sides of the welded steel 100 with the web 102 interposed therebetween, and has a straightening roller 510 that forms a straightening tool that abuts against the upper surface of the flange 101 and applies a straightening force to the flange 101. Yes. In the present embodiment, the correction roller 510 is exemplified as the correction tool, but various shapes of rollers can be used regardless of the type of the roller, and not only the roller but also a fixed correction jig such as an iron plate can be used. It is.

  Below, the case where the correction | amendment roller 510 is used is demonstrated. The correction roller 510 is attached to the tip of the lever 520 and is rotatably provided around the axis of the support shaft 511 disposed in a direction orthogonal to the conveying direction of the welded steel 100.

  In the present embodiment, the lever 520 holds the support shaft 511 in a posture along the axial direction of the lever 520, and the support shaft 511 is screwed into the lever 520 to move in and out in the axial direction of the support shaft 511. Then, the correction roller 510 is disposed at an arbitrary position in the width direction of the flange 101.

  As another embodiment, the support shaft 511 can be swung around the axis along the conveying direction of the welded steel 100, that is, around the axis perpendicular to the axis direction of the lever 520 (freely swingable). It is also possible to hold it.

  The lever 520 has a fulcrum 521 in the middle of the axial direction of the material, and swings around the axis of the fulcrum 521 to realize the action of the lever. It has a fulcrum holding part 525 that holds it up and down so that its position can be adjusted.

  In the fulcrum holding portion 525, a fulcrum 521 that pivotally supports the lever 520 is disposed through a vertically extending long hole 526 provided in the main body frame 201, and the fulcrum 521 is attached to an attachment plate 527 that spans the main body frame 201. An adjustment screw 528 for supporting the above is provided.

  The adjustment screw 528 constitutes a fulcrum drive device 522, which changes the vertical position of the fulcrum 521 and supports the fulcrum 521, indirectly supports the fulcrum 521 via the lever 520, and the lever 520. The fulcrum 521 may be directly supported by the adjusting screw 528 without going through. When the correction work is a single one, the fulcrum is fixed and used. It is also possible to move the fulcrum position up and down by other mechanical means and then fix the fulcrum position for use.

  Further, as shown in FIGS. 3 to 5, the fulcrum holding portion 525 may include a fulcrum driving device 522 including a hydraulic cylinder or the like that moves the fulcrum 521 of the lever 520 up and down instead of the adjustment screw 528. it can. Also in this case, the upper and lower positions of the fulcrum 521 are changed and fixedly supported.

  A lever driving device 523 is connected to the base end portion of the lever 520, and the lever 520 swings around the axis of the fulcrum 521 when the lever driving device 523 drives the base end portion of the lever 520. The lever driving device 523 is a hydraulic type or a mechanical type, and either a single acting type or an interlocking type can be adopted.

  In the present embodiment, the linear lever 520 is illustrated, but various types of levers 520 can be used. For example, an L-shape or a U-shape can be used. It is possible to select arbitrarily in consideration of the space. The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

The operation of the above configuration will be described below. In the welded steel 100, as shown in FIG. 6, the flange 101 is distorted upward inside the welded steel 100, that is, in the drawing.
1. As shown in FIG. Before the welding mold steel 100 is inserted, the fulcrum driving device 522 of the flange correction unit 500 disposed on both sides of the web 102 is used to move the fulcrum 521 of the lever 520 to a position suitable for the correction work, and then fixedly held. Then, the lever 520 is driven to arrange the correction roller 510 at a position above the flange 101.

  2. Next, the welded steel 100 is caused to enter the receiving portion 300 to dispose the flange 101 between the receiving roller 310 of the receiving portion 300 and the correcting roller 510 of the flange correcting portion 500, and the lower surface of the flange 101 is receiving roller 310. Abut.

  3. Next, the web guide roller 410 of the web guide unit 400 disposed on both sides of the web 102 is brought into contact with the side surface of the web 102 by guide roller moving means (not shown). At this time, the left and right correction rollers 510 move independently of each other, and the position of the web guide roller 410 is not restricted by the positions of the left and right correction rollers 510. The web 102 can be held in a vertical posture by being sandwiched by the web guide roller 410 at the lowermost position, that is, in the immediate vicinity of the leg length.

  4). Next, the lever 520 is swung around the axis of the fulcrum 521 by the lever driving device 523 of the flange correction unit 500 so that the correction rollers 510 at the distal ends of the left and right levers 520 are in contact with the flange 101, respectively. By further tilting the lever 520 from the state, a correction force is simultaneously applied to both sides of the flange 101 by the lever driving device 523 via the correction roller 510, and the facing portion of the flange 101 corresponding to the correction roller 510 is set in a horizontal posture. to correct.

  At this time, the pressing amount of the correction roller 510 applied to the flange 101 by the lever driving device 523 is set in the control unit of the lever driving device 523 in consideration of the spring back generated in the flange 101 after the correction operation. Can be straightened. The control unit may be provided in the lever driving device 523 or externally.

  5. Next, as shown in FIG. 5, the fulcrum 521 of the lever 520 is changed to the lower position by the fulcrum drive device of the flange correction unit 500 and fixed, and the lever 520 is moved around the axis of the fulcrum 521 by the lever drive device 523. By moving the lever 520 in a horizontal posture, the correction roller 510 is horizontally disposed along the flange surface that forms the facing portion corrected by the correction roller 510.

  6). In this state, as shown in FIG. 7, while the bending force of the flange 101 is received by the correction roller 510, the correction force is applied to the flange 101 via the correction roller 510 by the lever driving device 523 to change the posture of the correction roller 510. While holding firmly, the roller driving device 313 drives the receiving roller 310 to rotate, the receiving portion 300 feeds the welded steel 100 in the axial direction of the web 102, and the flange 101 is horizontally disposed over the entire length in the axial direction of the web 102. And it corrects at right angles to the web 102.

Although the case where the receiving roller 310 is used has been described in the above description, the same correction operation can be performed using a fixed correction jig such as an iron plate without being limited to the roller.
As described above, in the present embodiment, the web 102 is held by the web guide rollers 410 on both the left and right sides in the vertical posture while being sandwiched between the lowermost positions, that is, in the immediate vicinity of the leg length, and the flange correction portions 500 on both sides of the web 102. In FIG. 5, the levers 520 are swung independently to apply a correction force to the flange 101 according to the lever principle. For this reason, even when the angles of the flange 101 and the web 102 are different on the left and right sides of the flange 101, both the correction rollers 510 are simultaneously brought into contact with both sides of the flange 101, and the correction force is simultaneously applied to both sides of the flange 101. By acting, the difference between the left and right hip folding forces acting on the web 102 is reduced, and the web guide roller 410 holds the web 102 in the vertical position with the web 102 in the immediate vicinity of the leg length, thereby suppressing the hip folding force and preventing the hip folding. It can be corrected to a right angle or any angle without it.

  In the configuration of Patent Document 1 described above, since the upper roll is fixed, when the left and right umbrella folding distortions of the flanges are different, the upper rolls cannot simultaneously contact the left and right sides of the flange. Since a force acts on the web in one direction left and right in the initial stage of the operation, a large hip folding force is generated as a result.

  In addition, as in Patent Document 1, in the configuration in which the upper roll is fixed and the lower roll is moved and pressurized, the web is held vertically even if the H steel is inserted horizontally by moving the front and rear conveyors up and down. Therefore, at the initial stage of correction, the gap between the upper roll and the conveyor roll becomes the flange thickness and the amount of flange folding (maximum value + gap), and depends on the amount of umbrella folding and the amount of spring back after final pressurization. In consideration of the push-in amount, the distance from the weld leg length must be held by the web holding roll.

Therefore, in this invention, compared with the structure of patent document 1, the side of the welding leg length can be hold | maintained and the inhibitory force outstanding with respect to the hip-folding phenomenon can be exhibited.
Further, the present invention employs the lever principle, so that correction can be performed with a small force, and a small amount of movement (pressing force) of the correction roller 510 on the action point (pressure point) side can be reduced by the lever driving device 523. Since the control is performed with a large amount of movement on the power point side, an allowable error allowed as an operation amount of the lever driving device 523 is increased, and the amount of movement (pressing force) of the correction roller 510 can be accurately controlled. Furthermore, by adjusting the correction force in consideration of the springback generated in the flange after the correction operation, it can be corrected to an accurate squareness.

  In addition, the inclination of the correction roller 510 in the final correction posture changes according to the position of the fulcrum 521 of the lever 520. Therefore, the inclination of the correction roller 510 in the final correction posture by moving and fixing the fulcrum 521 to an appropriate position. Can be adjusted freely. For this reason, it is possible to perform the umbrella fold correction of the welded T-shaped steel, the vertical bending correction, and the flange angle correction with respect to the web in one stroke.

  Further, when the angle between the flange and the web is corrected by correcting the rain gradient of the bridge, etc., the present invention includes the correction of the rain gradient of the outer flange and the correction of the perpendicularity of the inner flange and the web, which was impossible with the conventional correction. Then it is possible.

  In addition, it is possible to perform preliminary correction using the distortion correction apparatus of the present embodiment. That is, when there is a part where the angle between the flange 101 and the web 102 is greatly different on the left and right of the web 102, and the part cannot be sufficiently corrected with an old correction device, for example, as shown in Patent Document 3 described above, Prior to the straightening operation by the straightening device, the web 102 is held in a vertical posture by the web guide rollers 410 on both the left and right sides at the straightening target position, and the straightening roller 510 at the tip of the lever 520 contacts the outer edge of the flange 101. By tilting the lever 520 in a state, a correction force is applied to the flange 101 by the lever driving device 523 via the correction roller 510 so that the angle between the flange 101 and the web 102 is equal to the right and left of the web 102. to correct. This operation is performed at a plurality of locations along the entire length of the welded steel 100. Where the preliminary correction operation is performed, the amount of folding of the flange 101 is measured by a sensor, laser measuring instrument, mechanical measuring means, manual measuring means, other measuring device, etc. When the measured value exceeds the reference value, a preliminary correction operation is performed. Before performing other straightening operations, the right and left skewness of the flange is measured by the above method before the H steel is straightened by a straightening machine, and the straightening is performed accordingly.

  Even when there is a portion where the angle between the flange 101 and the web 102 is greatly different on the left and right of the web 102 at the beginning, after performing this preliminary straightening operation, the flange 101 is moved to the web by a straightening operation using a conventional straightening device. It can be corrected horizontally over the entire axial length of 102 and perpendicular to the web 102.

  In the embodiment described above, the receiving roller 310 is disposed in the receiving portion 300. However, instead of the receiving roller 310, a lower correction jig (not shown) made of a fixing member such as an iron plate that can contact the lower surface of the flange 101. It is also possible to arrange.

  In this case, the welded steel 100 is transported by the front transporting means 610 and the post-transporting means 620, and the above correction operation is repeated to correct a plurality of locations on the welded steel 100. That is, the web 102 is held in a vertical posture by the web guide roller 410, the lever driving device 523 is driven at the correction target portion to swing the lever 520, and the correction tool (eg, iron plate) at the tip of the lever 520 is flanged. 102 is pressed to perform a correction operation. After the correction, the correction tool of the lever 520 is separated from the flange 102, and the welded steel 100 is conveyed to the next correction target position by the front conveying unit 610 and the rear conveying unit 620 in a state where the web guide roller 410 is separated from the web 102. . In this case, the web guide roller 410 may be an iron plate, for example.

  Therefore, the apparatus configuration is simple and inexpensive, and the welded steel 100 is not transported during the straightening operation, so that the power required for transport can be reduced and a motor with a small motor capacity can be used. In addition, the equipment cost can be reduced as a simple structure by omitting the receiving roller 310 and its bearing device.

  Further, in this embodiment, the receiving roller 310 has a so-called medium-high cylindrical shape as shown in FIG. 1, but the shape of the correction roller 510 and the receiving roller 310 may be any shape, but a relief surface is provided on the end side. It is also possible to form the entire peripheral surface into a hemispherical or arcuate curved surface.

  In the first embodiment described above, an example in which the angle between the flange 101 and the web 102 is corrected to a right angle has been shown. Next, an example in which the angle between the flange 101 and the web 102 is corrected to an arbitrary angle is shown. .

  As shown in FIG. 8, the lever 520 is swung around the axis of the fulcrum 521 by the lever driving device 523 of the flange correction unit 500 corresponding to the flange 101 on one side, and the correction roller 510 at the tip of the lever 520 is moved to the flange. By tilting the lever 520 while being in contact with the outer edge of the 101, the lever driving device 523 applies a correction force to the flange 101 via the correction roller 510, and the opposite portion of the flange 101 corresponding to the correction roller 510 is moved. Correction to an arbitrary angle with respect to the web 102.

  Further, the lever driving device 523 of the flange straightening unit 500 corresponding to the other flange 101 applies a straightening force to the flange 101 via the straightening roller 510, and the one side flange 101 and the other side flange 101 are linearized. The axes of the support shafts 511 of both the correction rollers 510 are formed coaxially.

  In this state, while the reaction force of the flange 101 is received by the correction roller 510, the roller driving device is configured to apply the correction force to the flange 101 via the correction roller 510 by the lever driving device 523 and maintain the posture of the correction roller 510. The receiving roller 310 is rotationally driven by 313, the welded steel 100 is sent out in the axial direction of the web 102 by the receiving part 300, and the angle between the flange 101 and the web 102 is corrected over the entire length in the axial direction of the web 102. The flange 101 can be inclined with respect to the web 102 at an arbitrary angle.

  In this embodiment, the flange 101 is corrected to the inclined posture while the web 102 is held vertically. However, the flange 101 can be corrected to the horizontal posture while holding the web 102 obliquely. It is also possible to correct one side of the flange 101 to an inclined posture and correct the other side of the flange 101 to a horizontal posture.

  Moreover, although the case where this apparatus is used independently was demonstrated in embodiment mentioned above, it is also possible to arrange | position a pair of this apparatus up and down to make a double structure, and to correct the upper and lower flanges 101 simultaneously.

DESCRIPTION OF SYMBOLS 100 Welding type steel 101 Flange 102 Web 200 Distortion correction apparatus 201 Main body frame 300 Receiving part 310 Receiving roller 311 Rotating shaft 312 Bearing 313 Roller drive device 400 Web guide part 410 Web guide roller 411 Flange guide roller 500 Correction roller part 510 Correction roller 511 Support Shaft 520 Lever 521 Support point 522 Support point driving device 523 Lever driving device 525 Support point holding portion 526 Long hole 527 Mounting plate 528 Adjustment screw 610 Front transport device 620 Rear transport device

In order to solve the above-mentioned problems, the distortion correction apparatus for welded steel according to the present invention corrects distortion generated in the flange in welded steel obtained by welding a web perpendicularly to the main surface of the flange. A receiving portion that abuts, a pair of flange correction portions disposed at both sides of the welded steel via the web, and a web guide portion that holds the web in a vertical posture with the web positioned in the immediate vicinity of the leg length . A corrector that abuts on the upper surface of the flange and applies a correction force to the flange, a lever that swings around a middle fulcrum and that has the corrector disposed at the tip, and that the lever is driven by pressure to tilt the lever. Thus, a lever driving device is provided that corrects by applying a correction force to both sides of the flange via the correction tool .

In the distortion correction apparatus for welded steel according to the present invention , the flange correction section includes a fulcrum holding section that holds the fulcrum of the lever so that the position of the fulcrum can be adjusted vertically.

Claims (6)

In the welded steel formed by welding the web vertically to the main surface of the flange, the distortion generated in the flange is corrected.
A receiving portion that contacts the lower surface of the flange;
A pair of flange straightening portions arranged on both sides of the welded steel via the web,
The flange straightening part is in contact with the upper surface of the flange to apply a straightening force to the flange, swings around a middle fulcrum, and a lever having the straightening tool disposed at the tip, and pressurizes the lever. A distortion straightening device for welded steel, comprising a lever driving device.   The distortion correction apparatus for welded steel according to claim 1, further comprising a web guide portion that holds the web in a vertical posture.   The distortion correction apparatus for welded steel according to claim 1 or 2, wherein the flange correction part has a fulcrum holding part for holding the fulcrum of the lever so that the position of the fulcrum can be adjusted vertically.   The fulcrum holding part has a fulcrum drive device that moves the fulcrum of the lever up and down.   The flange straightening part has a control part that controls the lever drive unit, and the control part sets the pressure push amount of the straightening tool applied to the flange by the lever drive unit, taking into account the spring back generated in the flange after the straightening operation The distortion straightening apparatus for welded steel according to any one of claims 1 to 4, characterized in that:   The receiving part has a lower correction jig capable of contacting the lower surface of the flange, and corrects the flange with the correction tool of the flange correction part and the lower correction jig. The distortion correction apparatus of the weld type steel as described in a term.

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