JP7005014B2 - Steel manufacturing equipment - Google Patents

Description

The present invention relates to a steel material manufacturing apparatus.

Patent Document 1 discloses a method for manufacturing a curved steel material, which is a steel material as a skeleton material used for a formwork member constituting a concrete formwork. In the method described in Patent Document 1, a bearing member as an end plate is positioned and welded to one end of a steel body.

JP-A-2017-755502

However, in steel materials, another end plate is often provided not only at one end but also at the other end. When the steel material is used as a part of the formwork member for tunnel lining, the mutual spacing between the end plates at both ends of the steel material, in other words, the total length of the steel material is accurately defined to the required value according to the dimensions of the formwork. There is a need to.

An object of the present invention is to provide a steel material manufacturing apparatus capable of welding end plates to both ends of a steel material body so as to have a required mutual spacing.

In order to achieve the above object, in the manufacturing method of the present invention, the flange material is positioned on the outer diameter side edge of the web material curved in the width direction, and the flange material is curved along the web material. After that, in the method of manufacturing a steel material in which the web material and the flange material are welded to form a curved steel body as a whole, the first end plate is welded to one end of the steel body and the end plate thereof is welded. The second end plate is positioned and welded to the other end of the steel body with the position of the first end plate as a reference.

Therefore, in the steel material manufacturing apparatus of the present invention, since the second end plate is positioned and welded with reference to the position of the first end plate, the distance between the first end plate and the second end plate, in other words. For example, the total length of the steel material can be accurately specified.

Further, in the steel material manufacturing apparatus of the present invention, a surface plate having an installation area for installing a web material curved in the width direction and a surface plate arranged in the installation area of the surface plate are arranged on the outer diameter side of the web material. A plurality of jigs for positioning the flange material provided in the above, and a pressing means provided at a position opposite to the jig via the installation area to press the web material toward the jig side. The first positioning means for positioning the first end plate provided at one end of the installation area and provided at one end of the web material, and the other of the web material provided at the other end of the installation area. It is characterized by being provided with a second positioning means for positioning the second end plate provided at the end.

Therefore, in the manufacturing apparatus of the present invention, the web material curved in the width direction is installed in the installation area on the surface plate, and the flange material located on the outer diameter side of the web material is positioned on the jig. .. Next, the flange material is deformed along the outer diameter side of the web material by the operation of the pressing means. Then, the first end plate is positioned at one end of the web material, and the second end plate is positioned at the other end of the web material. Therefore, by welding these members, the distance between the first end plate and the second end plate, in other words, the total length of the steel material can be accurately defined.

According to the present invention, there is an effect that the end plates can be accurately installed at both ends of the steel body so as to have a required mutual spacing.

Partial perspective view of the concrete lining formwork. An exploded perspective view of a steel material. The plan view which shows the manufacturing apparatus of a steel material. A side view showing a surface plate of a steel material manufacturing apparatus. Perspective view of the first jig. Perspective view of the second jig. The perspective view which shows the pressing means including a hydraulic cylinder. The plan view which shows the pressing means including a hydraulic cylinder. Sectional drawing of hydraulic cylinder and jig part. A perspective view of the mounting table. The plan view which shows the use state of the steel material manufacturing apparatus. A partial plan view of a steel material manufacturing apparatus showing a state in which an outer diameter side flange material is set. A partial plan view of a steel material manufacturing apparatus showing a state in which the first end plate is set. A partial plan view of a steel material manufacturing apparatus showing a state in which a second end plate is set. (A) and (b) are simplified views showing an assembly process of a steel body. The plan view which shows the modification example of the pressing means. (A) and (b) are sectional views of the web showing the case where the web material is tilted and the case where the web material is not tilted. The cross-sectional view which shows the modification example of a holding roller. Sectional drawing which shows the use state of the concrete lining formwork in a tunnel.

An embodiment embodying the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 19, the steel material 10 having a substantially arcuate curved shape constitutes the skeleton of the formwork member 12 which is a part of the concrete formwork 11. The formwork member 12 includes a skin plate 14 welded to the outer diameter side of the steel material 10 in order to form the surface of the concrete C. The steel material 10 includes a steel material body 13 having an H-shaped cross section curved in an arc shape, and a first end plate 25 is welded to one end of the steel material body 13 and a second end plate 29 is welded to the other end. There is. The first end plate 25 is configured by welding a plate 28 having a shaft hole 27 to a mounting plate 26. The second end plate 29 is composed of one plate material. A positioning hole 55 is transparently formed in the second end plate 29.

The concrete formwork 11 is configured by combining a plurality of formwork members 12, and is used for placing concrete C for tunnel lining on the inner peripheral side of the tunnel. The shaft hole 27 is for a shaft pin that connects the steel material 10 and another steel material 10.

As shown in FIG. 2, the steel body 13 has an H-shaped cross section. The steel body 13 is welded to the web material 22 constituting the web and the width edge of the web material 22 on the outer diameter side and the inner diameter side, respectively, and forms the outer diameter side flange and the inner diameter side flange. It is composed of a material 23 and an inner diameter side flange material 24. Therefore, the steel body 13 has an H-shaped steel structure. A flange piece 58 forming a part of the flange on the inner diameter side is welded to the inner diameter side of the end portion of the web material 22 on the second end plate 29 side, and the flange piece 58 has a shaft hole 54. One plate 52 is welded. The shaft hole 54 is for a shaft pin that connects the steel material 10 and another steel material 10 in the same manner as the shaft hole 27.

As shown in FIGS. 1, 2 and 15 (a) and 15 (b), the web material 22 is formed by cutting. Further, a flat plate-shaped outer diameter side flange material 23 and an inner diameter side flange material 24 that are not curved are prepared, and the flange materials 23 and 24 are curved on the width edge of the web material 22 on the outer diameter side and the inner diameter side. Along the line, it is deformed according to the curve. Then, in that state, the butt portion between the web material 22 and the flange materials 23 and 24 is welded to form the steel material main body 13. Further, prior to welding the outer diameter side flange material 23 and the web material 22, the first end plate 25 obtained by welding the plate 28 to the outer diameter side flange material 23 is welded. Further, the web material 22 and the flange materials 23 and 24 are welded, and the first end plate 25 is welded to one end of the steel material main body 13 including the web material 22 and the inner diameter side flange material 24. After that, the second end plate 29 is welded to the other end of the steel body 13. The flange piece 58 to which the plate 52 is welded may be welded at any timing before or after welding the inner diameter side flange member 24 and the second end plate 29.

Next, the steel material manufacturing apparatus of the present embodiment and the method of manufacturing the steel material using the manufacturing apparatus will be described.
In the manufacturing apparatus 31 of the present embodiment, the extending direction of the short side of the flat rectangular surface plate 32 shown in FIG. 3 is the front-rear direction of the manufacturing apparatus 31, and the first jig 34 and the second curing described later are used. The arrangement side of the jig 35 is the front side, and the hydraulic cylinder 41 side is the back side (rear side). Further, the extending direction of the long side of the surface plate 32 is the left-right direction of the manufacturing apparatus 31.

As shown in FIG. 4, the surface plate 32 of the manufacturing apparatus 31 is installed on the floor surface of the factory via the gantry 30, and is inclined in the front-rear direction so that the front side where the worker is normally located faces down. .. The inclination angle is preferably about 20 to 70 degrees with respect to the horizontal plane.

As shown in FIG. 3, the front side of the upper surface of the surface plate 32 is an installation area 60 for the web material 22, the outer diameter side flange material 23, and the inner diameter side flange material 24. A plurality of adjusting grooves 33 are transparently provided in the installation area 60 at equal intervals. These adjusting grooves 33 are located on a substantially arc line whose front end is centered on one point at the rear. The adjusting groove 33 is formed so as to extend on the radius line L1 centered on the above-mentioned one point.

On the front side of the installation area 60, a plurality of first jigs 34 and one second jig 35 arranged at a position to the right are arranged and installed. As shown in FIGS. 5 and 6, the first jig 34 and the second jig 35 are provided with upright receiving walls 343 and 353, respectively, and project rearward from the upper ends of the receiving walls 343 and 353. The ridges 344 and 354 are formed. In the first jig 34 and the second jig 35, the receiving walls 343 and 353 face the one point behind, and the entire jig row forms a curved forming surface.

As shown in FIG. 5, the first jig 34 has a bolt insertion hole 341 and a bolt insertion groove 342 extending in the left-right direction in its bottom wall 346. Then, the bolt 36 passing through the adjusting groove 33 from at least one of the bolt insertion hole 341 and the bolt insertion groove 342 is tightened by the nut 37 on the back surface side of the surface plate 32, so that the first jig 34 is placed on the surface plate 32. It is fixed. The front and rear positions of the first jig 34 are adjusted by loosening the nut 37 and moving the jig 34 along the adjusting groove 33. Further, by loosening the nut 37, the first jig 34 is rotated to adjust the orientation of the receiving wall 343 with respect to the installation area 60. A reinforcing wall 347 is interposed between the bottom wall 346 of the first jig 34 and one side of the receiving wall 343.

As shown in FIG. 6, the second jig 35 has a pair of bolt insertion grooves 352 extending in the left-right direction on the bottom wall 356. Then, the bolt 36 passing from the bolt insertion groove 352 to the adjusting groove 33 is tightened by the nut 37 on the back surface side of the surface plate 32, so that the second jig 35 is fixed on the surface plate 32. By loosening the nut 37 and moving the second jig 35 along the adjusting groove 33 and the bolt insertion groove 352, the front-rear position and the left-right position of the second jig 35 are adjusted. Further, by loosening the nut 37, the second jig 35 is rotated to adjust the orientation of the receiving wall 353 with respect to the installation area 60. A reinforcing wall 357 is interposed between the bottom wall 356 and the receiving wall 353 of the second jig 35.

The orientation and position of the first jig 34 and the second jig 35 are adjusted by the insertion holes 341, bolt insertion grooves 342, 352, bolts 36, nuts 37, etc. of the first jig 34 and the second jig 35. A jig position adjusting means for the purpose is configured.

As shown in FIG. 6, on the reinforcing wall 357, a positioning member 38 as a second positioning means has a positioning position on the back side shown by a solid line in FIG. 6 and a retracted position on the front side shown by a two-dot chain line by a shaft 39. It is rotatably supported between. The positioning member 38 is transparent with a hole 56 facing the hole 55 of the second end plate 29 when it is arranged at the positioning position.

As shown in FIG. 3, on the inner side of the installation area 60, a large number (only a part of which is shown) mounting holes 40 are formed in almost the entire surface of the surface plate 32. As shown in FIGS. 7 to 9, in the selected mounting holes 40, a plurality of hydraulic cylinders 41 constituting the pressing means are supported via bolts 421 of the bracket 42 at the front thereof, and the mounting holes 40 are supported. By selecting, the hydraulic cylinder 41 is installed at an arbitrary position. That is, one bolt 421 is fixed to the bracket 42, and this bolt 421 is fixed by a nut 422 on the lower surface side of the surface plate 32 through the mounting hole 40. Therefore, by loosening the nut 422, the hydraulic cylinder 41 can rotate about the bolt 421, and the orientation of the hydraulic cylinder 41 with respect to the installation area 60 can be adjusted. Therefore, the cylinder position adjusting means is configured by the bolt 421, the mounting hole 40, and the like. A pair of left and right pins 531 are fixed to the end member 53 on the rear side of the hydraulic cylinder 41, and the pins 531 are in contact with the upper surface of the surface plate 32. As is clear from FIG. 9, the height of the pin 531 and the angle of the lower surface of the bracket 42 on the front side are set so that the axis L2 of the hydraulic cylinder 41 faces diagonally downward with respect to the upper surface of the surface plate 32. Has been done. Normally, the hydraulic cylinders 41 are installed on the radius line L1 at substantially equal intervals from each other.

As shown in FIGS. 7 to 9, a stay 51 is attached to the piston rod 411 of the hydraulic cylinder 41. A roller support member 45 is rotatably supported at both ends of the stay 51 by a shaft 44, and a holding roller 46 constituting the pressing means is rotatably supported at both ends of the roller support member 45. The roller support member 45 has two support plates 47 and a spacer 49 fixed by bolts 48 between the two support plates 47, and the holding roller 46 is interposed between the two support plates 47. A regulation groove 461 is formed in the center of the outer circumference of the holding roller 46 in the axial direction, and inclined guide surfaces 462 are formed on both sides of the opening edge of the regulation groove 461.

As shown in FIGS. 10 and 11, a plurality of mounting tables 50 are installed at appropriate positions on the surface plate 32 at positions between the jig 34 and the pressing roller 46. The mounting table 50 is formed by welding a pair of pieces 501 in which the pipe material is sliced into round slices, and is formed to have a thickness substantially equal to the installation height of the web material 22 on the surface plate 32.

As shown in FIGS. 12 and 13, a circular accommodating hole 61 is formed in the surface plate 32 on the left side of the arrangement area of the jig 34, and a circular support plate 62 is formed in the accommodating hole 61. It is rotatably housed in a plane parallel to the upper surface of the surface plate 32. A center hole 621 is formed at the center of rotation of the support plate 62. A pin 74 is inserted and supported in the central hole 621. A turntable (not shown) that can freely rotate is provided at the inner bottom of the accommodating hole 61, and a support plate 62 is installed on the turntable. The center hole 621 and the pin 74 constitute the first positioning means.

As shown in FIGS. 12 and 13, a third jig 63 as a first positioning means as a receiving tool is fixed on the upper surface of the support plate 62, and a receiving wall 64 and a protrusion 641 are formed on the right side surface thereof. ing. The jig 63 used is the same as the plurality of first jigs 34 on the surface plate 32.

A holding metal fitting 65 is fixed to the upper surface of the support plate 62, and a gripping surface 66 located on a surface substantially orthogonal to the surface passing through the receiving surface of the receiving wall 64 of the third jig 63 is formed on the outer surface thereof. ing. A gripping lever 68 is rotatably supported by a shaft 69 on the bracket 67 of the holding metal fitting 65, and an end portion of an outer diameter side flange member 23 is provided at one end of the gripping lever 68 with the gripping surface 66. A grip portion 70 for gripping is formed. A spring 71 is hung on the other end of the lever 68 to urge the grip portion 70 to release the grip. At the position between the shaft 69 and the spring 71, the holding metal fitting 65 is provided with a hydraulic cylinder 72, and the piston rod 721 thereof faces the gripping lever 68. Then, due to the protrusion of the piston rod 721, the gripping lever 68 is rotated in the gripping direction against the elastic force of the spring 71.

Next, a method for manufacturing a steel material using the steel material manufacturing apparatus configured as described above will be described.
As shown in FIGS. 3 and 11, the positions of the first jig 34 and the second jig 35 and the orientation of the receiving wall 353 match the curved shape of the outer diameter of the web material 22 of the steel material body 13 to be manufactured. And adjust. Further, the position and orientation of the hydraulic cylinder 41 are adjusted according to the length of the steel body 13 and the curved shape of the inner diameter of the web material 22. Here, when the length of the steel body 13 is short, the hydraulic cylinder 41 at the center in the left-right direction is used, and when the length is long, the hydraulic cylinders 41 on both the left and right sides are also used.

In this state, the flat plate-shaped outer diameter side flange member 23 that is not curved is placed on the surface plate 32 and supported on the receiving wall 353 of the first jig 34 and the second jig 35. Further, the web material 22 is placed on the mounting table 50. Then, the inner diameter side flange material 24 is placed on the surface plate 32 so as to be located on the inner diameter side of the web material 22. In this case, if the inner diameter side flange material 24 interferes with the pressing roller 46, the operator may manually bend the inner diameter side flange material 24 to position the web material 22 in front of the pressing roller 46.

In this state, as shown in FIGS. 9 and 11, the hydraulic cylinder 41 is operated and the piston rod 411 is projected. As a result, the inner diameter side flange material 24 is pressed by the pressing roller 46, and as a result, the web material 22 and the outer diameter side flange material 23 are pushed, and the inner diameter side flange material 24 is curved along the web material 22. , The outer diameter side flange member 23 is curved along the curved surface formed by the web material 22 and the plurality of receiving walls 343 and 353. At this time, the outer diameter side flange member 23 is held by the ridges 344 and 354 of the receiving walls 343 and 353 without rising upward from the upper surface of the surface plate 32. Further, as shown in FIG. 7, since the hydraulic cylinder 41 is located on the diagonally downward axis L2, the inner diameter side flange material 24 is held at a predetermined position with respect to the web material 22 without being moved upward. Will be done.

Then, while maintaining this state, appropriate positions are welded between the inner and outer width end edges of the web material 22 and the inner side surfaces of the inner and outer flange materials 23 and 24 to integrate them. On the other hand, as shown in FIGS. 12 and 13, the mounting plate 26 of the first end plate 25 is on the outer diameter side at one end of the flat plate-shaped outer diameter side flange material 23 formed in advance longer than the inner diameter side flange material 24. It is welded so as to form a right angle to the flange member 23.

Then, the outer diameter side flange member 23 is installed on the surface plate 32, and the end portion of the outer diameter side flange member 23 is supported on the gripping surface 66 of the holding metal fitting 65. Further, the shaft hole 27 of the first end plate 25 is aligned with the center hole 621 of the support plate 62, and the pin 74 is inserted into the shaft hole 27 and the center hole 621 to position the first end plate 25. Further, the hydraulic cylinder 72 is operated to grip the end portion of the outer diameter side flange member 23 with the gripping surface 66.

In this state, if the inner diameter side flange material 24 is curved toward the receiving walls 343 and 353 of the jigs 34 and 35 by the pressing roller 46 as described above, the outer diameter side flange material 23 is deformed. The angle of the end portion of the outer diameter side flange member 23 changes. Along with this, the support plate 62 is rotated, the first end plate 25 is rotated about the pin 74, and the angle change of the outer diameter side flange member 23 is allowed. At this time, the first end plate 25 is received by the receiving wall 64 of the third jig 63 and is held in the positioning state.

Next, as shown in FIGS. 11 and 14, the positioning member 38 on the right side of the installation area 60 is arranged at the rear positioning position, and the second end plate 29 is attached to the positioning member 38 on the receiving wall of the second jig 35. Keep it in contact with 353. Here, it is preferable to insert the positioning pin 57 into the hole 56 of the positioning member 38 and the hole 55 of the second end plate 29 so that the positioning state of the second end plate 29 is maintained. Instead of using the pin 57, the second end plate 29 and the positioning member 38 may be clamped and held by a clamper (not shown). In this case, the second jig 35 is positioned at a position based on the surface of the receiving wall 631 of the third jig 63 on the installation area 60 side, in other words, at a position based on the position of the first end plate 25. The position is adjusted so that the surface of the web material 22 side is positioned. Then, the second end plate 29 is welded to the web material 22 and the inner diameter side flange material 24. In this case, the second end plate 29 is welded to at least the web material 22. Therefore, the maximum length of the curved steel body 13 is from the first end plate 25 to the second end plate 29 regulated by the positioning member 38, and the second is due to a slight difference in the degree of bending of the steel body 13. A gap may be formed between the end plate 29 and the steel body 13. However, if the weld metal is interposed in the gap, there is no problem in the bonding between the steel body 13 and the second end plate 29, and the difference in length of the steel body 13 can be absorbed.

As described above, the mutual distance between the first end plate 25 and the second end plate 29 can be accurately defined, and the steel material 10 having an accurate length can be obtained. Therefore, it is possible to assemble formwork members with accurate dimensions.

As described above, the flange piece 58 may be welded at any timing before or after welding the inner diameter side flange member 24 and the second end plate 29. However, as shown in FIG. 14, after welding the second end plate 29 to the web material 22 or the like, the end portion of the flange piece 58 is applied to the second end plate 29, and the flange piece 58 is welded to the web material 22. , The plate 52 having the shaft hole 54 can be accurately positioned. In this case, in addition to the web material 22, the flange piece 58 may be welded to the second end plate 29.

In this embodiment, it has the following effects.
(1) Since the second end plate 29 is positioned and welded to the other end of the steel body 13 with the first end plate 25 at one end of the steel body 13 as a reference, the first end plate 25 and the second end plate 29 are used together. The distance between them can be set accurately. Therefore, the total length of the steel material 10 can be set accurately, and the formwork member 12 can be assembled with high accuracy. Further, if the flange piece 58 is welded to the web material 22 or the like after the second end plate 29 is welded, the plate 52 having the shaft hole 54 can be accurately positioned.

(2) Since the position and orientation of the second jig 35 having the positioning member 38 can be adjusted back and forth and left and right, the positioning member 38 can be accurately aligned with the end portion of the steel body 13. Therefore, the steel material main body 13 and the second end plate 29 can be accurately positioned to obtain the steel material 10 having high shape accuracy. That is, the position of the second jig 35 can be adjusted in the direction along the direction intersecting the bending direction on the outer diameter side of the web material 22 and in the direction of changing the direction with respect to the installation area 60. Therefore, the second end plate 29 can be accurately arranged along the end of the steel body 13.

(3) Moreover, in a state where the nut 422 of the hydraulic cylinder 41 is loosened, when the inner diameter side flange material 24 is pressed, the direction and shaft of the hydraulic cylinder 72 are changed according to the deformation and the position change of the inner diameter side flange material 24. The orientation of the presser roller 46 centered on 44 is naturally changed. Therefore, regardless of the difference in the position and curvature of the web material 22, the inner diameter side flange material 24 is pressed reasonably, and the outer diameter side flange material 23 and the inner diameter are formed on the outer diameter side and the inner diameter side edges of the web material 22. The side flange member 24 can be aligned. Therefore, the steel body 13 having high shape accuracy can be manufactured, and it is possible to prevent an unreasonable force from acting on the hydraulic cylinder 72, the jigs 34, 35, and the like, and prevent the manufacturing apparatus 31 from malfunctioning. That is, when the hydraulic cylinder 72 is operated to deform the outer diameter side flange material 23 and the inner diameter side flange material 24, the first end plate 25 welded to the outer diameter side flange material 23 is rotated around the pin 74. It keeps the fixed position just by welding. Therefore, when the web material 22 is changed to one having a different length or curvature, the position or inclination of the edge portion on the inner diameter side of the web material 22 or the position or inclination of the edge portion on the second end plate 29 side of the web material 22. The angle changes. In the present embodiment, it is possible to obtain a smooth operation of the manufacturing apparatus 31 in response to such a change without difficulty.

(4) The positioning member 38 can be arranged from the positioning position to the retracted position. Therefore, in the production of a steel material that does not use the second end plate 29, the positioning member 38 can perform the work without getting in the way.

(Change example)
The present invention is not limited to the above embodiment, and can be embodied in the following embodiments.

As shown in FIG. 16, the roller support member 45 supported by the shaft 44 at the tip of the piston rod 411 of the hydraulic cylinder 41 is integrated into one unit.
The web material 22 is pressed against the outer diameter side flange material 23 by the holding roller 46 of the hydraulic cylinder 41 to bend the outer diameter side flange material 23, and then the holding roller 46 is immersed by the piston rod 411 of the hydraulic cylinder 41. Is temporarily retracted from the web material 22. Then, the inner diameter side flange material 24 is installed between the web material 22 and the pressing roller 46, and the inner diameter side flange material 24 is pressed against the web material 22 by the pressing roller 46. In this method, when the outer diameter side flange material 23 and the inner diameter side flange material 24 are thick or short and difficult to bend, even if the thrust of the hydraulic cylinder 41 is small, the flange material 23, 24 can be easily curved.

-As shown in FIG. 18, the regulation groove 461 of the pressing roller 46 is deepened so that the web material 22 can be held in the cantilever state. With this configuration, the web material 22 can be cantilevered at a plurality of positions other than its line symmetry, so that the web material 22 can be kept substantially parallel to the upper surface of the surface plate 32. That is, as shown in FIGS. 2 and 17 (a) and 17 (b), when the curved web material 22 is tilted so that the outer diameter side 221 is on the lower side, the inner diameter side central portion 222 and the inner diameter side The height α is different from that of the both end portions 223. Therefore, when the inner diameter side 224 of the web material 22 is held at the same height at a plurality of positions deviating from the line symmetric position in the length direction of the web material 22, the entire area of the outer diameter side 221 of the web material 22 is the inner diameter side 224. It becomes the same height position as. Therefore, if the regulation grooves 461 of the plurality of pressing rollers 46 are arranged at the same height position, the entire web material 22 can be held at the height position.

In the above embodiment, the steel body 13 having an H-shaped cross section is formed into a curved shape by the outer diameter side flange material 23, the inner diameter side flange material 24, and the web material 22. On the other hand, the steel body 13 having a T-shaped cross section is formed and welded by the web material 22 and the flange material 23 on the outer diameter side, and the first end plate 25 and the second end plate 29 are welded to both ends of the steel body 13. After that, the inner diameter side flange material 24 is welded to the inner diameter side of the web material 22. In this case, as in the above embodiment, the inner diameter side flange material 24 may be pressed against the web material 22 to be curved and welded, or the pre-curved inner diameter side flange material 24 may be welded to the web material 22. ..

-Integrate the flange piece 58 with the second end plate 29. That is, the flange piece 58 is welded to the second end plate 29 in advance, and the second end plate 29 in that state is welded to the web material 22.
-Integrate the flange piece 58 with the inner diameter side flange material 24. That is, the flange piece 58 is welded to the inner diameter side flange material 24 in advance, and the inner diameter side flange material 24 in that state is welded to the web material 22.

10 ... Steel material, 13 ... Steel body, 22 ... Web material, 23 ... Outer diameter side flange material, 24 ... Inner diameter side flange material, 25 ... First end plate, 29 ... Second end plate, 31 ... Manufacturing equipment, 32 ... Surface plate, 34 ... 1st jig, 35 ... 2nd jig, 41 ... hydraulic cylinder, 46 ... holding roller, 60 ... installation area, 63 ... 3rd jig, 74 ... pin, 411 ... piston rod, 621 ... Central hole.

Claims (2)

A surface plate with an installation area for installing web material curved in the width direction,
A plurality of jigs arranged in the installation area of the surface plate and positioning the flange material provided on the outer diameter side of the web material, and
It is provided at a position opposite to the jig via the installation area, and is provided with a pressing means for pressing the web material toward the jig side.
A first positioning means provided at one end of the installation area and for positioning a first end plate provided at one end of the web material.
A second positioning means provided at the other end of the installation area and for positioning the second end plate provided at the other end of the web material is provided .
The second positioning means is provided on one jig in a jig row composed of the plurality of jigs.
A steel material manufacturing apparatus capable of arranging the second positioning means at a positioning position for positioning the second end plate and a retracted position retracted from the positioning position . A jig position adjusting means for adjusting the position of the jig having the second positioning means in a direction intersecting the bending direction on the outer diameter side of the web material and a direction changing the direction is provided, and the pressing means is used as a cylinder. The steel material manufacturing apparatus according to claim 1 , further comprising a holding roller provided at the tip of a piston rod of the cylinder and provided with a cylinder position adjusting means for adjusting the direction of the cylinder around one place.

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