Method for manufacturing hyperbolic chord member of bolted and welded steel truss girder of bridge
A hyperbolic, steel truss girder technology, applied in bridges, bridge construction, bridge forms, etc., can solve the problem of inability to complete the manufacture of bridge hyperbolic chords, and achieve the effect of ensuring accuracy requirements
Active Publication Date: 2022-05-06
中铁宝桥(扬州)有限公司 +1
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Problems solved by technology
Straight chords or chords with vertical curves, the plate units of this type of chord are all flat, the welding of plate units and chords can be carried out on a flat tire frame, and the plate units do not need to be deliberately bent or made For shapes other than plane, the manufacturing process is relatively simple, but it cannot complete the manufacture of bridge hyperbolic chords
Method used
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Embodiment 1
[0031] Embodiment 1: with reference to attached Figure 1-7 . A specific implementation steps of a method for manufacturing a hyperbolic chord of a bridge bolted and welded steel truss girder:
[0032] Step 1: utilize computer three-dimensional software to carry out three-dimensional modeling;
[0033] Step 2: Utilize computer three-dimensional software to expand the curved gusset plate;
[0034] Step 3: Use a precision CNC cutting machine to cut and blank the material to ensure the geometric dimensions of the gusset plate and the linear requirements of the stiffener;
[0035] Step 4: Use laser scribing equipment to draw the bending line and the gusset plate drilling opposite line, such as figure 1 shown;
[0036] Step 5: Use the CNC bending machine to bend the gusset plate according to the drawings;
[0037] Step 6: Design special curved plate unit tire frame, such as figure 2 As shown in , place the gusset plate and web plate that are qualified for bending on the curv...
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Abstract
The invention relates to a method for manufacturing a hyperbolic chord member of a bolted and welded steel truss girder of a bridge, which comprises the following steps of: firstly, carrying out three-dimensional modeling by three-dimensional software, unfolding a bent gusset plate, cutting by using a precise numerical control cutting machine, marking a bending line and a gusset plate drilling opposite line by using laser marking equipment, profiling the gusset plate, and carrying out top bending after blanking a corresponding stiffening rib; a curve jig frame is arranged, after the curve jig frame is detected to be qualified, the gusset plate and the web plate are placed on the curve jig frame, trimming is conducted after welding, and the bending degree of the gusset plate is detected again; a chord member vertical curve is controlled through a high-precision jig frame, a top plate unit, a partition plate, a gusset plate unit and a bottom plate unit are sequentially arranged in the jig frame, a horizontal curve line shape of the chord member is controlled through lead screws on the two sides of the jig frame, then a reasonable welding sequence is determined, welding deformation is trimmed after welding is finished, and the requirements of the horizontal curve and the vertical curve are met. After alignment, a drilling sample plate is used for drilling, and the problem of manufacturing of the hyperbolic chord member of the bridge is solved through a series of measures.
Description
technical field [0001] The invention relates to a method for manufacturing a hyperbolic chord of a bridge bolted and welded steel truss girder, which can not only solve the difficult problem of manufacturing bridge hyperbolic chords, but also ensure its precision requirements, and belongs to the field of steel structure bridge manufacturing. Background technique [0002] In general, curved bridges are mostly steel box girder bridges. In order to reduce the difficulty of manufacture, bolted and welded steel truss bridges are not equipped with flat curves. However, due to the limitation of urban space in municipal bridges, the bridge centerline turns. However, this type is characterized by novel design and beautiful appearance, and it will become more and more popular for urban steel truss bridges that require aesthetics. Existing chord members are designed to be straight (see figure 1 ), or with a vertical curve (see figure 2 ). Straight chords or chords with vertical cur...
Claims
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IPC IPC(8): B23P15/00E01D19/00E01D6/00
CPCB23P15/00E01D19/00E01D6/00Y02T90/00
Inventor 穆长春刘志刚吴江波曹林谢益飞刘生奇胡帆
Owner 中铁宝桥(扬州)有限公司