CN110170799A - Steel box-girder manufacture craft - Google Patents
Steel box-girder manufacture craft Download PDFInfo
- Publication number
- CN110170799A CN110170799A CN201910482950.5A CN201910482950A CN110170799A CN 110170799 A CN110170799 A CN 110170799A CN 201910482950 A CN201910482950 A CN 201910482950A CN 110170799 A CN110170799 A CN 110170799A
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- China
- Prior art keywords
- panel
- plate
- steel
- web
- blanking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses a kind of steel box-girder manufacture crafts, design the technical field of bridge construction, solve the problems, such as the correction of later period caused by moderate finite deformation amount heavy workload occur after existing panel welding, its key points of the technical solution are that the following steps are included: A. steel plate pre-processes；B. blanking: a. diaphragm plate blanking processing；B. web blanking；C. the blanking of panel, bottom plate；The processing of d.U type floor blanking；C. moulding bed is built；The welding of D.U type floor；E. the assembling of steel box-girder component；F. coating first carries out the welding of U-shaped floor on panel, then carries out subsequent welding assembly again, the deformation of panel is controlled by U-shaped floor, to reduce the shrinkage after panel welding, so that the deflection of panel is reduced, so that workload when welding is corrected after completing is smaller.
Description
Technical field
The present invention relates to the technical fields of bridge construction, more specifically, it is related to a kind of steel box-girder manufacture craft.
Background technique
Steel box-girder is called ntitorque steel plate box-girder, is the common structure type of Large Span Bridges, is commonly used in the biggish bridge of span
Liang Shang, because external form is as a chest, so being called steel box-girder.In large span cable support bridge, the span of steel case girder reaches
Several hundred rice or even upper km, being generally divided into several beam section manufactures and installation, cross section has wide cut and flat sShape features.
Existing steel box-girder is all complete in the process made, between each composition component by welding
Mode links together, and the structure of steel box-girder itself is more complicated, and the length of panel weld is longer, the rear panel of welding
Shrinkage be it is uncontrollable, this also have led to welding complete after, biggish deformation often can all occur in panel, thus
So that larger workload when welding is corrected after completing.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of steel box-girder manufacture craft, pass through
When assembling, the welding of U-shaped floor is first carried out on panel, subsequent welding assembly is then carried out again, passes through U-shaped floor
The deformation of panel is controlled, so that the shrinkage after panel welding is reduced, thus reduce the deflection of panel, so that
Workload when welding is corrected after completing is smaller.
To achieve the above object, the present invention provides the following technical scheme that a kind of steel box-girder manufacture craft, including following step
It is rapid:
A. steel plate pre-processes: derusting pretreatment is carried out to steel plate before carrying out blanking, then in steel within four hours
The surface of plate sprays one layer of pretreatment primer；
B. blanking: when carrying out blanking to plate the following steps are included:
A. diaphragm plate blanking is processed: according to blanking in-process inventory, typesetting figure and part sketch, being cut into diaphragm plate, and in cross
The clearance hole fillet of suitable dimension size is outputed according to the requirement of design drawing in the corner of partition；
B. according to the requirement of design, setting-out web blanking: is carried out to the web of girder steel；The pre- arch value of elder generation's calculating loft when setting-out；
The camber splicing for encircleing setting-out size and composing rule little progress row steel plate in advance according to web, for web length setting-out when, to longitudinal direction
Length puts 0.8mm/ meters of welding allowance for shrinkage, the steel plate being stitched together is welded together；Welding terminate after to steel
The commissure of plate carries out non-destructive testing, and carries out cutting stock, edge bevel and the hair by edge after detection is qualified
Thorn polishing is clean；
C. the blanking of panel, bottom plate: must be according to according to job instruction pair and steel plate bevel, when carrying out steel plate splicing
The rolling direction of steel plate is spliced, and is first spliced partition to overall length according to marker map when splicing, is then paid attention to laterally weldering
It is sewn on and needs the 200mm or more that is staggered when splicing between each other, then by the plate of splicing by the way of submerged-arc welding
Weld together, when plate and bottom plate carry out turning over welding over there, needs to turn over using autocratic shoulder pole hanging beam；Panel and
It after bottom plate submerged-arc welding terminates, is spaced 24 hours, cross weld, longitudinal seam and T font weld seam is gone out to carry out ultrasonic wave spy
Wound, flaw detection is qualified and then hangs onto panel and bottom plate respectively and carries out cutting stock on numerical control cutting machine；
D.U type floor blanking processing: the cutting stock of U-shaped floor is carried out according to the size of design, after blanking terminates, need by
Steel plate bending processing is U-shaped, carries out flame heating to U-shaped board when processing, then bents into U-shaped；
C. moulding bed is built: according to the real sample of box beam reversely being built moulding bed, is carried out moulding bed and need that moulding bed is kept to have when building
There is higher rigidity, prevent moulding bed from deforming after bearing load, needs to carry out moulding bed after moulding bed builds completion
Detection repeatedly；
The welding of D.U type floor: the panel that blanking is finished has corrected flatness, then horizontal to hang in assembled moulding bed,
U-shaped floor is placed on panel surface, the U-shaped opening of U-shaped floor is towards panel surface, by U-shaped floor by the way of spot welding
It is tentatively fixed on the surface of panel, is then weldingly fixed on panel completely by U-shaped floor；
E. the assembling of steel box-girder component: the position that U-shaped floor side draws web, diaphragm plate and the assembly of vertical muscle is welded in panel
Line is set, diaphragm plate is fixed on panel by position to the layout line；Diaphragm plate spot welding is fixed on panel, is then pacified vertical muscle
On panel；Web is lifted on moulding bed, so that the central point of web and the central point of panel overlap, is then adopted
With the mode of outside level pressure web is pressed on diaphragm plate, is consolidated by the way of piecewise spot welding from the middle to both ends
It is fixed；Bottom plate is lifted on moulding bed, is fixed by the way of spot welding from the middle to both ends；First by reversed moulding bed top panel with
The weld seam of web and bottom plate and web is reinforced, and is reinforced the welding for carrying out turning over lifting lug after completing, is then adjusted to girder steel
Turn and hang on positive moulding bed again to reinforce the weld seam of the panel of the other side and web and bottom plate and web；
F. coating: spraying one layer of antirust coat on the surface of soldered steel box-girder, and check antirust coat, qualification
Entrucking is transported afterwards.
By using above-mentioned technical proposal, when being assembled, U-shaped board is first welded on panel, so that panel
In the process of subsequent welding, will receive the limitation of U-shaped board when generating contraction so that panel have passed through it is subsequent
Welding after shrinkage reduce, thus reduce panel welding after deflection, thus reduce the later period to steel box-girder into
Workload when row correction.
The present invention is further arranged to: in the step A, when being derusted in advance to steel plate, by the way of impeller blasting
It derusts, the roughness for controlling steel surface is 25 μm~100 μm, after impeller blasting terminates, needs practical compressed air
The impurity such as the dust by surface of steel plate are cleaned out.
By using above-mentioned technical proposal, by controlling the roughness of steel surface, enable subsequent pretreatment primer
Enough surfaces for preferably adhering to steel.
The present invention is further arranged to: in the step A, pretreatment primer selects inorganic zinc silicate primer, coating thickness
It is 25 μm.
The present invention is further arranged to: in the step a, when carrying out hole machined in diaphragm plate, using numerical control fire
Flame cutting machine carries out cutting processing, and carries out polishing amendment to cutting place, until size and shape meet drawing requirement.
By using above-mentioned technical proposal, make the aperture of inner hole more convenient by flame cutting machine.
The present invention is further arranged to: in the step b, needing to web successively to calculate with 500mm for a unit
The pre- arch value of web everywhere, and form charting.
It can be improved and put by the way that web is calculated pre- arch value with 500mm for a unit by using above-mentioned technical proposal
The precision of sample.
The present invention is further arranged to: in the step d, being bent into U-shaped U-shaped floor and is placed on U-shaped frame, pass through U
Type frame keeps the shape of U-shaped board, until U-shaped floor is cooling to cause room temperature.
By using above-mentioned technical proposal, the shape of U-shaped floor is limited by U-shaped frame, prevents U-shaped floor from existing
The variation of shape occurs in cooling process.
The present invention is further arranged to: in the step D, after U-shaped floor is tentatively fixed on panel, by panel
Four sides use fixture to be clamped on moulding bed everywhere.
By using above-mentioned technical proposal, moulding bed will be all clamped to everywhere in four sides of panel by fixture
On, it can be further reduced the shrinkage of panel, reduce the deformation quantity of panel by the limit of four sides to panel.
The present invention is further arranged to: in the step E, after diaphragm plate is fixed on panel, in each tabula
The fixed link being fixed on moulding bed is all arranged in the two sides of plate, and fixed link contacts with each other with diaphragm plate.
By using above-mentioned technical proposal, diaphragm plate can be limited by fixed plate, enable diaphragm plate more
Good holding vertical state.
In conclusion the present invention has the advantages that compared with the prior art
1, the mode that the present invention is welded by using U-shaped floor, so that panel generates contraction in the process of subsequent welding
When will receive the limitation of U-shaped board so that panel shrinkage after it have passed through subsequent welding is reduced, to reduce
Deflection after panel welding, to reduce workload of later period when correcting to steel box-girder；
2, the present invention will be clamped on moulding bed by fixture everywhere in four sides of panel, can be by panel
The limit of four sides is further reduced the shrinkage of panel, reduces the deformation quantity of panel.
Specific embodiment
A kind of embodiment: steel box-girder manufacture craft, comprising the following steps:
A. steel plate pre-processes: carrying out derusting pretreatment to steel plate before carrying out blanking, processing method is using impeller blasting
Mode derust, control steel surface roughness be 25 μm~100 μm, after impeller blasting terminates, need practical pressure
Contracting air cleans out the impurity such as the dust of surface of steel plate, then sprays one layer in advance on the surface of steel plate within four hours
Priming paint is handled, priming paint selects inorganic zinc silicate primer, and coating thickness is 25 μm；
B. blanking: when carrying out blanking to plate the following steps are included:
A. diaphragm plate blanking is processed: according to blanking in-process inventory, typesetting figure and part sketch, being gone out with NC flame cutting
Diaphragm plate, and the clearance hole fillet of suitable dimension size is outputed in the corner of diaphragm plate according to the requirement of design drawing；Into
In row diaphragm plate when hole machined, cutting processing is carried out using NC flame cutting machine, and beat with cutting place
Mill amendment, until size and shape meet drawing requirement；
B. according to the requirement of design, setting-out web blanking: is carried out to the web of girder steel；The pre- arch value of elder generation's calculating loft when setting-out,
The error that setting-out is reduced when calculating pre- arch value needs to web successively to calculate web everywhere for a unit with 500mm
Pre- arch value, and form charting；Encircle the camber splicing of setting-out size and composing rule little progress row steel plate in advance according to web, it is right
When the length setting-out of web, to longitudinal length, 0.8mm/ meters of welding allowance for shrinkage is put, the steel plate being stitched together is welded
Together；Welding carries out non-destructive testing the commissure with steel plate after terminating, in NC flame cutting machine after detection is qualified
Upper carry out cutting stock, the edge bevel and sanding burr of edge is clean；
C. the blanking of panel, bottom plate: must be according to according to job instruction pair and steel plate bevel, when carrying out steel plate splicing
The rolling direction of steel plate is spliced, and is first spliced partition to overall length according to marker map when splicing, is then paid attention to laterally weldering
It is sewn on and needs the 200mm or more that is staggered when splicing between each other, then by the plate of splicing by the way of submerged-arc welding
Weld together, when plate and bottom plate carry out turning over welding over there, since the length and width of panel and bottom plate is all larger,
It needs to turn over using autocratic shoulder pole hanging beam；It after panel and bottom plate submerged-arc welding terminate, is spaced 24 hours, to cross weld, indulges
Go out to carry out ultrasonic examination to weld seam and T font weld seam, flaw detection is qualified and then panel and bottom plate are hung onto numerical control respectively
Cutting stock is carried out on cutting machine；
D.U type floor blanking processing: the cutting stock of U-shaped floor is carried out according to the size of design, after blanking terminates, need by
Steel plate bending processing is U-shaped, carries out flame heating to U-shaped board when processing, then bents into U-shaped, is bent into U-shaped U-shaped floor
It is placed on U-shaped frame, the shape of U-shaped board is kept by U-shaped frame, until U-shaped floor is cooling to cause room temperature；
C. moulding bed is built: according to the real sample of box beam reversely being built moulding bed, is carried out moulding bed and need that moulding bed is kept to have when building
There is higher rigidity, prevent moulding bed from deforming after bearing load, needs to carry out moulding bed after moulding bed builds completion
Detection repeatedly；
The welding of D.U type floor: the panel that blanking is finished has corrected flatness, then horizontal to hang in assembled moulding bed,
U-shaped floor is placed on panel surface, the U-shaped opening of U-shaped floor is towards panel surface, by U-shaped floor by the way of spot welding
It is tentatively fixed on the surface of panel, all U-shaped floors are all tentatively fixed after terminating, everywhere by four sides of panel
It is clamped on moulding bed using fixture, so that four sides of panel are not in that position is mobile, then U-shaped floor is complete
It is weldingly fixed on panel entirely；
E. the assembling of steel box-girder component: the position that U-shaped floor side draws web, diaphragm plate and the assembly of vertical muscle is welded in panel
Line is set, diaphragm plate is fixed on panel by position to the layout line, is arranged one in the two sides of each diaphragm plate and is fixed on
Fixed link on moulding bed, fixed link contact with each other with diaphragm plate, to keep diaphragm plate in a vertical state；By diaphragm plate spot welding
It is fixed on panel, then vertical muscle is mounted on panel；Web is lifted on moulding bed, so that the central point of web and face
The central point of plate overlaps, then using outside level pressure by the way of web is pressed on diaphragm plate, using from centre to
The mode of the piecewise spot welding in both ends is fixed；Bottom plate is lifted on moulding bed, is carried out by the way of spot welding from the middle to both ends
It is fixed；First the weld seam of reversed moulding bed top panel and web and bottom plate and web is reinforced, reinforces after completing turn over and hang
The welding of ear, welding carry out magnetic powder inspection to lifting lug after completing, are then turned to girder steel and hang in positive moulding bed
On the weld seam of the panel of the other side and web and bottom plate and web is reinforced again；
F. coating: spraying one layer of antirust coat on the surface of soldered steel box-girder, and check antirust coat, qualification
Entrucking is transported afterwards.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of steel box-girder manufacture craft, it is characterised in that: the following steps are included:
A. steel plate pre-processes: derusting pretreatment is carried out to steel plate before carrying out blanking, then in steel within four hours
The surface of plate sprays one layer of pretreatment primer；
B. blanking: when carrying out blanking to plate the following steps are included:
A. diaphragm plate blanking is processed: according to blanking in-process inventory, typesetting figure and part sketch, being cut into diaphragm plate, and in cross
The clearance hole fillet of suitable dimension size is outputed according to the requirement of design drawing in the corner of partition；
B. according to the requirement of design, setting-out web blanking: is carried out to the web of girder steel；The pre- arch value of elder generation's calculating loft when setting-out；
The camber splicing for encircleing setting-out size and composing rule little progress row steel plate in advance according to web, for web length setting-out when, to longitudinal direction
Length puts 0.8mm/ meters of welding allowance for shrinkage, the steel plate being stitched together is welded together；Welding terminate after to steel
The commissure of plate carries out non-destructive testing, and carries out cutting stock, edge bevel and the hair by edge after detection is qualified
Thorn polishing is clean；
C. the blanking of panel, bottom plate: must be according to according to job instruction pair and steel plate bevel, when carrying out steel plate splicing
The rolling direction of steel plate is spliced, and is first spliced partition to overall length according to marker map when splicing, is then paid attention to laterally weldering
It is sewn on and needs the 200mm or more that is staggered when splicing between each other, then by the plate of splicing by the way of submerged-arc welding
Weld together, when plate and bottom plate carry out turning over welding over there, needs to turn over using autocratic shoulder pole hanging beam；Panel and
It after bottom plate submerged-arc welding terminates, is spaced 24 hours, cross weld, longitudinal seam and T font weld seam is gone out to carry out ultrasonic wave spy
Wound, flaw detection is qualified and then hangs onto panel and bottom plate respectively and carries out cutting stock on numerical control cutting machine；
D.U type floor blanking processing: the cutting stock of U-shaped floor is carried out according to the size of design, after blanking terminates, need by
Steel plate bending processing is U-shaped, carries out flame heating to U-shaped board when processing, then bents into U-shaped；
C. moulding bed is built: according to the real sample of box beam reversely being built moulding bed, is carried out moulding bed and need that moulding bed is kept to have when building
There is higher rigidity, prevent moulding bed from deforming after bearing load, needs to carry out moulding bed after moulding bed builds completion
Detection repeatedly；
The welding of D.U type floor: the panel that blanking is finished has corrected flatness, then horizontal to hang in assembled moulding bed,
U-shaped floor is placed on panel surface, the U-shaped opening of U-shaped floor is towards panel surface, by U-shaped floor by the way of spot welding
It is tentatively fixed on the surface of panel, is then weldingly fixed on panel completely by U-shaped floor；
E. the assembling of steel box-girder component: the position that U-shaped floor side draws web, diaphragm plate and the assembly of vertical muscle is welded in panel
Line is set, diaphragm plate is fixed on panel by position to the layout line；Diaphragm plate spot welding is fixed on panel, is then pacified vertical muscle
On panel；Web is lifted on moulding bed, so that the central point of web and the central point of panel overlap, is then adopted
With the mode of outside level pressure web is pressed on diaphragm plate, is consolidated by the way of piecewise spot welding from the middle to both ends
It is fixed；Bottom plate is lifted on moulding bed, is fixed by the way of spot welding from the middle to both ends；First by reversed moulding bed top panel with
The weld seam of web and bottom plate and web is reinforced, and is reinforced the welding for carrying out turning over lifting lug after completing, is then adjusted to girder steel
Turn and hang on positive moulding bed again to reinforce the weld seam of the panel of the other side and web and bottom plate and web；
F. coating: spraying one layer of antirust coat on the surface of soldered steel box-girder, and check antirust coat, qualification
Entrucking is transported afterwards.
2. steel box-girder manufacture craft according to claim 1, it is characterised in that: in the step A, removed in advance to steel plate
It when rust, is derusted by the way of impeller blasting, the roughness for controlling steel surface is 25 μm~100 μm, impeller blasting knot
After beam, practical compressed air is needed to clean out the impurity such as the dust of surface of steel plate.
3. steel box-girder manufacture craft according to claim 1, it is characterised in that: in the step A, pretreatment primer is selected
Inorganic zinc silicate primer, coating thickness are 25 μm.
4. steel box-girder manufacture craft according to claim 1, it is characterised in that: in the step a, carrying out in diaphragm plate
When hole machined, cutting processing is carried out using NC flame cutting machine, and carry out polishing amendment to cutting place, until
Size and shape meet drawing requirement.
5. steel box-girder manufacture craft according to claim 1, it is characterised in that: in the step b, need to web with
500mm is a unit, successively calculates the pre- arch value of web everywhere, and form charting.
6. steel box-girder manufacture craft according to claim 1, it is characterised in that: in the step d, be bent into U-shaped U-shaped
Floor is placed on U-shaped frame, and the shape of U-shaped board is kept by U-shaped frame, until U-shaped floor is cooling to cause room temperature.
7. steel box-girder manufacture craft according to claim 1, it is characterised in that: in the step D, U-shaped floor is preliminary
After being fixed on panel, fixture is used to be clamped on moulding bed everywhere four sides of panel.
8. steel box-girder manufacture craft according to claim 1, it is characterised in that: in the step E, diaphragm plate is fixed on
After on panel, one fixed link being fixed on moulding bed, fixed link and diaphragm plate are set in the two sides of each diaphragm plate
It contacts with each other.
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| CN201910482950.5A CN110170799B (en) | 2019-06-04 | 2019-06-04 | Steel box girder manufacturing process |
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| CN111546001A (en) * | 2020-05-08 | 2020-08-18 | 安徽伟宏钢结构集团股份有限公司 | Manufacturing process of high-strength beam body |
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| CN111546001A (en) * | 2020-05-08 | 2020-08-18 | 安徽伟宏钢结构集团股份有限公司 | Manufacturing process of high-strength beam body |
| CN111790995A (en) * | 2020-05-17 | 2020-10-20 | 北京市政建设集团有限责任公司 | Construction process for welding steel beam |
| CN111644818A (en) * | 2020-06-15 | 2020-09-11 | 宝鸡中铁宝桥天元实业发展有限公司 | Manufacturing method of high-precision hollow steel tower steel anchor box |
| CN112077532A (en) * | 2020-08-10 | 2020-12-15 | 南通贝思特机械工程有限公司 | Groove body assembling and welding method |
| CN112719795A (en) * | 2020-12-17 | 2021-04-30 | 江苏恒睿杰钢结构工程有限公司 | Manufacturing method of large steel box girder |
| CN113020813B (en) * | 2021-03-17 | 2023-10-24 | 嘉兴职业技术学院 | Design cutting and welding integrated production system and production method thereof |
| CN113020813A (en) * | 2021-03-17 | 2021-06-25 | 嘉兴职业技术学院 | Design cutting and welding integrated production system and production method thereof |
| CN113458718A (en) * | 2021-06-07 | 2021-10-01 | 中铁十八局集团隧道工程有限公司 | Steel box girder manufacturing process |
| CN113560829A (en) * | 2021-08-20 | 2021-10-29 | 江苏京沪重工有限公司 | Machining process for semi-circular arc small tie beam |
| CN114535846A (en) * | 2022-01-27 | 2022-05-27 | 中交三公局第三工程有限公司 | Steel box girder welding tool and welding process thereof |
| CN114535846B (en) * | 2022-01-27 | 2023-11-03 | 中交三公局第三工程有限公司 | Steel box girder welding tool and welding process thereof |
| CN115255823A (en) * | 2022-07-27 | 2022-11-01 | 中铁二十五局集团第二工程有限公司 | Steel beam top plate unit manufacturing process |
| CN115476064A (en) * | 2022-09-14 | 2022-12-16 | 南通中远海运重工装备有限公司 | Manufacturing process of main beam of tyre gantry crane |
| CN115476064B (en) * | 2022-09-14 | 2023-06-30 | 南通中远海运重工装备有限公司 | Manufacturing process of main beam of tyre gantry crane |
| CN115401424A (en) * | 2022-09-26 | 2022-11-29 | 广东省水利水电第三工程局有限公司 | Plate unit manufacturing process |
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