KR100326518B1 - A manufacturing system of a horizonta rib for box girder in a bridge structure - Google Patents

Abstract

Box-shaped structures used for the construction of bridges are welded and attached to horizontal ribs consisting of horizontal and vertical members inside the structure to reinforce the structural strength. Since it is a factor to lower the durability of the present invention provides a transverse rib manufacturing system for box girders of bridge structures that can prevent such deformation to improve the structural strength.

The lateral rib manufacturing system for a box girder of such a bridge structure includes a pair of base frames, rollers rotatably installed on the frame to enable movement of a moving object with a small force, and When the horizontal and vertical members welded to the base frame are lifted and moved, the first correction part corrects the warpage of these materials, the weld part welding the corrected lateral ribs simultaneously on both sides, and the heat deformation of the welded lateral ribs in the vertical direction and And a second calibration section for calibration in the horizontal direction.

Description

Horizontal rib manufacturing system for box girder of bridge structure {A MANUFACTURING SYSTEM OF A HORIZONTA RIB FOR BOX GIRDER IN A BRIDGE STRUCTURE}

The present invention is to manufacture the horizontal girders for the box girders (BOX GIRDER) of the bridge structure to be welded while correcting the bending of the horizontal and vertical members to improve the structural strength by increasing the adhesion of the members when manufacturing the box girders used for the bridge It's about the system.

In general, bridges constructed by using box girders are more durable under the same conditions than bridges constructed by other methods. Thus, construction techniques using box girders have been used in recent years.

The box girders used for the bridge are externally formed by a pair of plates facing up and down and another pair of plates welded to them while maintaining a constant distance between these plates.

The box girders made in this way have to withstand significant loads when installed in bridges and must have a structurally strong structure. To this end, currently used box girders are provided with diaphragms for rigid reinforcement, and horizontal ribs are installed at regular intervals.

Fig. 1 is a perspective view of a box girder which is generally used for the construction of a bridge, and Fig. 2 is a perspective view showing a lateral rib used for this box girder, wherein the box girder is a pair of plates 2 and 4 positioned up and down. And a pair of plates 6 and 8, which are positioned in a direction facing each other while being positioned in the direction orthogonal to this plate, are welded to form an outer shape.

The plates 2 and 4 are welded with longitudinal ribs and lateral ribs for structural reinforcement, where the lateral ribs are welded to the plate in a state where the horizontal member 10 and the vertical member 12 are welded.

Therefore, these plates 2 and 4 and the horizontal member 10 and the vertical member 12 of the transverse ribs should be in close contact with each other so that good welding can be achieved.

In addition, the horizontal ribs improve the structural strength by forming a slot 14 in the vertical member 12 to allow the other horizontal ribs 16 to be inserted into the slot and to weld.

However, the horizontal member 10 or the vertical member 12 constituting the lateral ribs is cut into bands from a wide plate-like material. In this cutting process, the band-like member causes bending, and in the case of the vertical member 12, the slot 14 is formed. Since the oxygen is cut by this, heat deformation is caused by receiving heat of about 1600 ° C. or more.

As described above, the lateral ribs may be mechanically or thermally deformed in the preparation process, and thus bend in the vertical direction or the left and right directions as shown in FIG. 3.

When the deformed vertical member 12 and the horizontal member 10 are welded as described above, the perpendicularity is dropped between them, and the lifting phenomenon may partially occur between these materials, resulting in poor welding. When used in box girders, a satisfactory effect is not achieved in reinforcing structural strength.

According to the present invention, the horizontal ribs used to reinforce the structural strength in the box girders can be formed at right angles while the bending is corrected so that the horizontal ribs for the box girders can be substantially increased when used in the box girders. The purpose is to provide a system.

In order to realize the object of the present invention as described above, the warp of the raw material is corrected in the state of preparing a vertical member and a horizontal member and welding them, and the corrected horizontal member and the vertical member are simultaneously welded from both sides, and are heated by welding heat during welding. We propose a system to correct the horizontal and vertical deflection of transverse ribs that cause deformation.

1 is a view for explaining a box girder according to the present invention.

2 is a view for explaining a transverse rib for reinforcing the structural strength of a box girder according to the present invention.

3 is a diagram showing a modification of the transverse ribs according to the present invention.

Figure 4 is a front view of the box girder manufacturing system according to the present invention.

Figure 5 is a detailed view of the attaching machine in Figure 4;

6 is a view for explaining the vertical operation of the mounting machine shown in FIG.

7 is a view for explaining the horizontal operation of the mounting device in FIG.

8 is a detailed view of a welded part according to the present invention.

9 is a plan view of FIG. 8;

Figure 10 is a detailed view of the braces of the present invention.

11 is a view for explaining the vertical operation of the calibrator.

12 is a view for explaining the horizontal operation of the calibrator.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 and 5 are diagrams schematically showing a lateral rib manufacturing system for a box girder according to the present invention, which is provided with a pair of base frames 20 and installed in the base frame to move the lateral ribs with a small force. And a roller 22, wherein the base frame includes a preparation part 24 for welding and welding the horizontal member 10 and the vertical member 12 before welding, and the horizontal member 10 weldable at this preparation part. ) And a first calibration section 26 for firstly correcting the deformation of the vertical member 12, a weld section 28 for welding the horizontal and vertical members of the lateral ribs corrected to the calibration section 26, and the weld section 28 In the horizontal and vertical members of the welded transverse ribs in the final correction of the deformation during welding includes a second straightening portion 30 to correct the deflection.

As shown in FIGS. 5, 6, and 7, the first straightening part 26 proposed by the present invention is a vertical cylinder 32 and a horizontal cylinder 34 as corrective means for correcting the vertical and horizontal warp of the horizontal rib. ) Is used.

The vertical cylinder 32 may be installed through another frame 36 installed on the base frame 20, and the fixing plate 38 is installed on the frame 36 at the end of the piston rod of the horizontal cylinder 34. The pressing plate 40 provided allows the vertical ribs 12 of the horizontal ribs positioned between them to be corrected by the pressing force.

When the vertical cylinder 32 presses the vertical member 12 of the lateral rib from the upward direction to the downward direction, the horizontal member 10 of the lateral rib is supported by the roller 22 installed in the base frame 20 to immediately deform the deformation. I will catch you.

In addition, the base frame 20 is provided with another horizontal cylinder 42 for pressing the horizontal member 10 of the horizontal ribs, the side facing the fixing plate for supporting the horizontal member 10 of the horizontal ribs ( 44) is installed.

Substantially, this fixing plate 44 is installed on the transverse rib passage while the member 46 having the same surface as the roller 22 or a little lower than this is installed across the base frame in parallel. Can be.

8 and 9 show the welding portion 28 in detail, the spacer 48 is provided on any one of the base frame 20 of the pair of base frame 20 so that the guide rail 50 can be positioned at a constant height. have.

The welding device 52 is located on the guide rail 50 and is configured to move along the rail. The welding device may be a CO 2 welder, and this welding machine may be used in general, so a detailed description thereof is omitted. do.

The welding apparatus of the present invention uses a universal one, but the two torch portions 54 and 56 are positioned in opposite positions so that welding can be performed simultaneously on both sides of the horizontal member and the vertical member of the lateral rib. There is this.

The two torch portions 54 and 56 may be installed downward by holders 60 and 62 installed in front and rear of the horizontal member 58 extending from the body of the welding device 52, respectively.

The welding portion 28 is provided with a fixture 66 above the horizontal member 64 across the base frame 20 to prevent the horizontal ribs from flowing when the horizontal member and the vertical member of the horizontal ribs are welded. A horizontal cylinder 68 for pressing the ribs is provided below the welding device.

10, 11 and 12 show the second calibration in detail. The second straightening part is used for finally correcting a warp in which the lateral ribs in which welding is completed causes deformation during welding or not completely corrected in the first straightening part, and the first gate 70 and the second gate 72 on the base frame 20. Is installed.

These gates 70 and 72 each use a frame, the first gate 70 having means for calibrating the horizontal member 10 of the welded transverse ribs, which means a vertical cylinder operating from below to above. 74 and a fixing table 76 for fixing the horizontal member 10 of the lateral ribs pressed upward by the vertical cylinder 74.

On the vertical cylinder 74, a lifter 78 on which the horizontal ribs are raised is positioned. When the vertical cylinder is operated, the lifter is pushed up and the horizontal ribs are pushed upward.

The holder 76 is composed of a pair so that the vertical member 12 of the transverse ribs can be positioned between the vertical member is installed apart to the size that can pass.

Means for finally correcting the transverse ribs through this first gate 70 are provided to the second gate 72.

This means includes a pair of horizontal cylinders 80 for correcting the horizontal deflection of the lateral ribs and a pair of vertical cylinders 82 for correcting the vertical deflection.

The horizontal rib manufacturing system for the box girders of the bridge structure according to the present invention thus formed is welded to the box girders in the state where the horizontal member 10 and the vertical member 12 are prepared, and the preparation parts 24 are prepared. On the roller 22, the operator pushes the fusible lateral rib to the first straightening part 26 and moves it.

That is, as shown in Fig. 5, the horizontal ribs, which are shown by dashed lines, are moved to the first straightening part 26. At this time, when the front end portions of the horizontal ribs are positioned near the horizontal cylinders 34 and 42, these cylinders are operated. Let's do it.

As such, when the horizontal cylinder is operated, the piston rod of the cylinder moves forward, and the pressure plate 40 presses the vertical member 12 against the fixed plate 38 to correct the warpage. At the same time, the cylinder 42 operates to form a horizontal rib. The horizontal member 10 is pressed against the fixed plate 46 to correct the warpage.

At the same time, while the vertical cylinder 32 operates, the vertical member 12 of the lateral ribs is urged upwards and downwards. In this case, since the lateral ribs are supported by the rollers 22, the vertical direction of the lateral ribs is made. (See Figures 6 and 7)

Accordingly, the warp of the material is corrected in the state in which the horizontal member 10 and the vertical member 12 are welded, and the horizontal ribs having been corrected are moved to the welding part 28 by the roller 22.

The horizontal ribs moved to the welding part 28 are CO 2 welded by the usual welding method, in which the two torch parts 54 and 56 are located at the left and right sides of the horizontal ribs, so welding is simultaneously performed on both sides. Is done.

Since the welding device performs welding while moving along the guide rail 50 by the motor, the lateral ribs remain stopped during the welding.

At this time, as shown in Fig. 9, the horizontal cylinder 68 operates to press the horizontal member 10 of the horizontal ribs to the holder 66 so that the horizontal ribs do not flow.

After passing through the welding process, the transverse ribs pass through the first gate 70 while being moved to the second straightening unit 30 by the roller 22. At this time, the vertical cylinder 74 is operated to lift the lifter 78 upwards. When pushed, the lifter 78 pushes the horizontal member 10 of the lateral rib and presses the holder 76 so that the lifter 78 can be corrected in the vertical direction by the heat of welding.

When the correction is made in this way, the lateral ribs pass through the second gate 72. At this time, the pair of vertical cylinders 82 and the pair of horizontal cylinders 80 operate simultaneously, and the horizontal member 10 of the lateral ribs and The vertical member 12 is pressed to correct the warpage.

As described above, the horizontal rib manufacturing system for box girders of the bridge structure according to the present invention can weld straight materials because the horizontal and vertical members are welded to correct the deformation before welding is performed. Since the welded lateral ribs are corrected again, the warp of the lateral ribs does not remain.

Therefore, welds can be welded orthogonally to the girder's plate to reinforce structural strength in the box girders, further increasing the rigidity.As the welding is performed on both sides simultaneously, the lateral rib welding time can be reduced. There is an effect that welding is performed in a single line.

Claims (6)

A base frame on which a plurality of rollers are rotatably disposed; A first correcting unit for correcting the horizontal and vertical warping of the material when the horizontal material and the vertical material are moved in rolling contact with the rollers in a state of being welded to each other; A welding part for welding horizontal and vertical members of which the deflection is corrected in the first straightening part at the same time; The horizontal rib manufacturing system for the box girders (BOX GIRDER) of the bridge structure consisting of a second correction portion for correcting the thermal deformation of the horizontal member and the vertical member welded in the weld. The horizontal rib manufacturing system of claim 1, wherein the first straightening part comprises a vertical cylinder for correcting vertical warpage of the horizontal member and the vertical member, and a horizontal cylinder for correcting horizontal deflection of the horizontal member and the vertical member. The welding unit is a welding rail which is disposed on a base frame, a welding device that moves along the guide rail, and a member extending from the body of the welding device, and is disposed left and right about the vertical member of the horizontal rib. The horizontal rib manufacturing system for the box girders of a bridge structure containing a pair of torch parts performed. The bridge structure of claim 1, wherein the second straightening portion includes a first gate for correcting vertical deformation of the welded transverse rib and a second gate for simultaneously correcting vertical and horizontal warpage of the corrected transverse rib in the first gate. Lateral rib manufacturing system for box girders. The first gate is a vertical cylinder provided in the base frame, a lifter for pushing up the lateral ribs welded on the piston rod of the vertical cylinder and restraining the rise of the lateral ribs lifted by the lifter. Transverse rib manufacturing system for box girders of bridge structures including stators. The transverse rib manufacturing system according to claim 4, wherein the second gate comprises a pair of vertical cylinders and a pair of horizontal cylinders.