CN114434105A - Method for manufacturing hyperbolic chord member of bridge bolted steel truss girder - Google Patents
Method for manufacturing hyperbolic chord member of bridge bolted steel truss girder Download PDFInfo
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- CN114434105A CN114434105A CN202210103902.2A CN202210103902A CN114434105A CN 114434105 A CN114434105 A CN 114434105A CN 202210103902 A CN202210103902 A CN 202210103902A CN 114434105 A CN114434105 A CN 114434105A
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- gusset plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention relates to a method for manufacturing a hyperbolic chord member of a bridge bolted steel truss beam, which comprises the steps of firstly, carrying out three-dimensional modeling by three-dimensional software, unfolding a bent gusset plate, cutting by a precise numerical control cutting machine, scribing a bending line and a gusset plate drilling opposite line by using laser scribing equipment, profiling the gusset plate, carrying out top bending after blanking corresponding to a stiffening rib, arranging a curve jig frame, placing the gusset plate and a web plate on the curve jig frame after the curve jig frame is detected to be qualified, finishing after welding, and detecting the bending degree of the gusset plate again; the high-precision jig frame is used for controlling the vertical curves of the chords, the top plate unit, the partition plates, the gusset plate unit and the bottom plate unit are sequentially arranged in the jig frame, the flat curve line shapes of the chords are controlled through the lead screws on the two sides of the jig frame, then the reasonable welding sequence is determined, welding deformation is repaired after welding is finished, the requirements of the flat curves and the vertical curves are met, drilling is carried out by using a drilling sample plate after the lines are formed, and the problem of manufacturing the hyperbolic chord members of the bridge is solved through a series of measures.
Description
Technical Field
The invention relates to a method for manufacturing a bridge stud welding steel truss girder hyperbolic chord member, which can solve the difficulty in manufacturing the bridge hyperbolic chord member and ensure the precision requirement of the bridge stud welding steel truss girder hyperbolic chord member, and belongs to the field of manufacturing of steel structure bridges.
Background
Under general conditions, curve bridges are mostly steel box girder bridges, in order to reduce the manufacturing difficulty, the bolted and welded steel truss girder bridges are not provided with flat curves, but in municipal bridges, due to the limitation of urban space, the center lines of the bridges turn, although the manufacturing difficulty is increased, the type of bridge has the characteristics of novel design and attractive appearance, and the bridge is certainly more popular to urban steel truss girder bridges requiring aesthetic feeling. The prior chord members are designed as straight lines (see fig. 1), or with vertical curves (see fig. 2). The plate units of the straight-line chord members or the chord members with vertical curves are planes, the plate units and the chord members can be assembled and welded on the flat tire frame, the plate units do not need to be bent intentionally or made into other shapes except the planes, the manufacturing process is relatively simple, and the manufacture of the hyperbolic chord members of the bridge cannot be finished.
Disclosure of Invention
The design purpose is as follows: the method for manufacturing the hyperbolic chord member of the bolted steel truss girder of the bridge can solve the difficulty in manufacturing the hyperbolic chord member of the bridge and guarantee the precision requirement of the hyperbolic chord member of the bridge.
The design scheme is as follows: the patent to be researched by the invention is a manufacturing method of a stud welding steel truss girder hyperbolic chord member, namely, the chord member not only has a vertical curve, but also has a flat curve at a node plate part (see figure 3).
As the municipal bridge is limited by urban space, the center line of the bridge turns, and although the manufacturing difficulty is increased, the type of the bridge has the characteristics of novel design and attractive appearance, and is more and more popular. The steel beam structure with the characteristics has the advantage of controlling the precision requirement. The invention designs a method for manufacturing a hyperbolic chord member of a bridge stud welding steel truss girder, which can effectively solve the problems, improve the production efficiency, ensure the manufacturing precision of the chord member and play a good reference role in the subsequent similar steel girder manufacturing process.
Carrying out three-dimensional modeling through three-dimensional software, unfolding a bent gusset plate, cutting the gusset plate by using a precise numerical control cutting machine, drawing a bending line and a gusset plate drilling opposite line by using laser scribing equipment, profiling the gusset plate, carrying out numerical control precise blanking corresponding to a stiffening rib, setting a curve jig, placing the gusset plate and a web plate on the curve jig after the curve jig is detected to be qualified, trimming after welding, and detecting the bending degree of the gusset plate again; the high-precision jig frame is used for controlling the vertical curves of the chords, the top plate units, the partition plates, the gusset plate units and the bottom plate units are sequentially arranged in the jig frame, the flat curve line shapes of the chords are controlled through the lead screws on the two sides of the jig frame, then the reasonable welding sequence is determined, welding deformation is repaired after welding is finished, the requirements of the flat curves and the vertical curves are met, drilling is conducted by using a drilling sample plate after the lines are met, the problem of manufacturing the hyperbolic chord members of the bridge is solved through a series of measures, and the precision requirements are met.
The technical scheme is as follows: a method for manufacturing a hyperbolic chord member of a bridge bolted steel truss girder,
step 1, utilizing computer three-dimensional software to carry out three-dimensional modeling;
step 2, unfolding the bent gusset plate by using computer three-dimensional software;
cutting and blanking by using a precise numerical control cutting machine to ensure the requirements of the geometric dimension of the gusset plate and the shape of the stiffening rib line;
step 4, marking out a bending line and a drilling opposite line of the gusset plate by using laser scribing equipment;
step 5, bending the gusset plate by using a numerical control bending machine according to a drawing;
step 6, placing the node plates and the webs which are qualified in bending on a curve jig frame, trimming after welding and detecting the bending degree of the node plates again;
step 7, assembling the stiffening ribs on the gusset plate, trimming after welding and detecting the bending degree of the gusset plate again;
step 8, designing and manufacturing a high-precision chord member assembly welding jig frame, arranging supporting plates according to the elevation requirement of the control points, and measuring the relative coordinates and elevations of the control points;
step 9, placing the top plate unit on a jig frame, and controlling the close contact degree of the top plate and the supporting plate;
step 10, positioning the partition plates on the top plate according to lines, and controlling the distance between the partition plates and the angle relation between the top plate and the partition plates;
and 11, positioning the bent gusset plate units according to a line, adjusting the curve elements of the gusset plate and the size of a chord box opening, and fixing by using lead screws on two sides of the jig frame.
And 12, positioning the bent bottom plate units according to lines, and controlling the curve elements of the hyperbolic chord and the size of the chord box opening.
And step 13, trimming each curve element of the hyperbolic chord member after welding, and drilling the bolt hole at the position of the gusset plate by using a high-precision drilling sample plate after meeting the design requirement.
Compared with the background art, the invention effectively solves the difficulty of manufacturing the hyperbolic chord member; secondly, the precision requirement of the design is effectively guaranteed, and the precision reaches to the maximum; thirdly, the invention provides reference for the manufacture of similar steel members in the future.
Drawings
FIG. 1 is a schematic diagram of a laser scribing apparatus for scribing a bending line and a drilling opposite line of a gusset plate.
Figure 2 is a schematic view of a dedicated jig frame of the curve plate unit.
FIG. 3 is a schematic view of the assembly of stiffening ribs to the gusset plate.
FIG. 4 is a schematic view of bolt holes drilled in the gusset plate locations.
Fig. 5 is a schematic view of a support strut.
Fig. 6 is a schematic diagram showing the curve elements of the hyperbolic chord and the dimensions of the chord box opening.
Fig. 7 is a schematic diagram of a high-precision drilling template.
Fig. 8 is a background art schematic.
Fig. 9 is a schematic sectional view of a-a portion in fig. 8.
Detailed Description
Example 1: reference is made to fig. 1-7. The specific implementation steps of the method for manufacturing the hyperbolic chord member of the bridge bolted steel truss girder are as follows:
step 1, utilizing computer three-dimensional software to carry out three-dimensional modeling;
step 2, unfolding the bent gusset plate by using computer three-dimensional software;
cutting and blanking by using a precise numerical control cutting machine to ensure the requirements of the geometric dimension of the gusset plate and the shape of the stiffening rib line;
step 4, marking out a bending line and a drilling opposite line of the gusset plate by using laser scribing equipment, as shown in figure 1;
step 5, bending the gusset plate by using a numerical control bending machine according to a drawing;
step 6, designing a special curve plate unit jig frame, as shown in fig. 2, placing the node plates and the webs which are qualified in bending on the curve jig frame, trimming after welding, and detecting the bending degree of the node plates again;
step 7, assembling the stiffening ribs on the gusset plate, as shown in FIG. 3, trimming after welding and re-detecting the bending degree of the gusset plate;
step 8, designing and manufacturing a high-precision chord assembly welding jig frame, arranging supporting plates according to the elevation requirements of the control points, as shown in FIG. 5, and measuring relative coordinates and elevations of the control points;
step 9, placing the top plate unit on a jig frame, and controlling the close contact degree of the top plate and the supporting plate;
step 10, positioning the partition plates on the top plate according to lines, and controlling the distance between the partition plates and the angle relation between the top plate and the partition plates;
and 11, positioning the bent gusset plate units according to a line, adjusting the curve elements of the gusset plate and the size of a chord box opening, and fixing by using lead screws on two sides of the jig frame.
And 12, positioning the bent bottom plate units according to lines, and controlling the curve elements of the hyperbolic chord and the size of the chord box opening as shown in figure 6.
And step 13, trimming each curve element of the hyperbolic chord member after welding, and drilling bolt holes at the position of the gusset plate by using a high-precision drilling template (shown in figure 7) after the design requirement is met, as shown in figure 4.
Practice proves that the manufacturing method of the hyperbola chord member of the bridge stud welding steel truss girder can completely meet the requirement of the precision of the hyperbola chord member. More importantly, the requirements on geometric dimension and welding quality are met, the production efficiency is improved, and the method has high practical and popularization values. Can play a good reference role in the subsequent similar hyperbolic chord manufacturing process.
It is to be understood that: although the above embodiments have described the design idea of the present invention in more detail, these descriptions are only simple descriptions of the design idea of the present invention, and are not limitations of the design idea of the present invention, and any combination, addition, or modification without departing from the design idea of the present invention falls within the scope of the present invention.
Claims (1)
1. A method for manufacturing a hyperbolic chord member of a bridge bolted steel truss girder is characterized by comprising the following steps of:
step 1, utilizing computer three-dimensional software TAKELA to carry out 1:1 three-dimensional modeling;
step 2, unfolding the bent inner and outer side gusset plates by utilizing computer three-dimensional software TAKELA;
cutting and blanking by using a precise numerical control cutting machine, ensuring the geometric dimension of the gusset plate and the linear requirement of the stiffening rib, wherein the blanking tolerance is +/-1 mm, and the linear deviation of the stiffening rib is not more than 2mm;
step 4, marking out a bending line and a drilling opposite line of the gusset plate by using laser scribing equipment within +/-1 mm of tolerance;
step 5, bending the gusset plate by using a numerical control bending machine according to a drawing, and ensuring that the rise and the theoretical value after bending do not exceed 2mm;
step 6, placing the node plates and the webs which are qualified in bending on a curve jig frame, performing flame finishing after welding, and detecting the bending degree (rise of each control point) of the node plates again through a level;
step 7, assembling the stiffening ribs on the gusset plate, welding, then carrying out flame finishing and detecting the bending degree of the gusset plate again by using a level gauge, namely the rise of each control point;
step 8, designing and manufacturing a high-precision chord member assembly welding jig frame, arranging supporting plates according to the elevation requirement of the control points, wherein the height deviation of the supporting plates is less than 1mm, and measuring the relative coordinates and elevations of the control points;
step 9, placing the top plate unit on a jig frame, and controlling the close contact degree of the top plate and the supporting plate;
step 10, positioning the partition plates on the top plate according to a line, and controlling the distance between the partition plates and the angle between the top plate and the partition plates to be less than 2mm and the angle between the top plate and the partition plates to ensure that the verticality of the partition plates is less than 1.5 mm;
step 11, positioning the bent gusset plate units according to lines, adjusting the sizes of all curve elements and chord box openings of the gusset plates, ensuring that the rise of a horizontal curve and a vertical curve has a theoretical deviation of less than 2mm and the size of the box opening is less than 2mm, and then fixing by using lead screws on two sides of a jig frame;
step 12, positioning the bent bottom plate unit according to lines, controlling the curve elements of the hyperbolic chord and the size of the chord box opening, and ensuring that the rise of a horizontal curve and a vertical curve and the theoretical deviation are less than 2mm and the size of the box opening is less than 2mm;
and step 13, trimming each curve element of the hyperbolic chord member after welding, ensuring that the rise of a horizontal curve and a vertical curve and the theoretical deviation are less than 2mm, and drilling the bolt hole at the position of the gusset plate by using a high-precision drilling sample plate after meeting the requirement.
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| CN202210103902.2A CN114434105B (en) | 2022-01-28 | 2022-01-28 | Manufacturing method of bridge bolt welded steel truss girder hyperbolic chord member |
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| CN202210103902.2A CN114434105B (en) | 2022-01-28 | 2022-01-28 | Manufacturing method of bridge bolt welded steel truss girder hyperbolic chord member |
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| CN115070242A (en) * | 2022-06-20 | 2022-09-20 | 中铁宝桥（扬州）有限公司 | Manufacturing method of steel box girder embedded with chord members |
| CN115255814A (en) * | 2022-06-21 | 2022-11-01 | 中铁宝桥（扬州）有限公司 | Method for manufacturing steel shell space non-developable curved surface decorative plate unit |
| CN116104012A (en) * | 2023-01-12 | 2023-05-12 | 中铁九桥工程有限公司 | Assembling method of space curve steel beam |
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| CN115255814B (en) * | 2022-06-21 | 2023-07-14 | 中铁宝桥（扬州）有限公司 | Manufacturing method of steel shell space inextensible curved surface decorative plate unit |
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| CN114434105B (en) | 2023-08-22 |
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