CN105880940A - Method for manufacturing box-type bent-torsional component - Google Patents
Method for manufacturing box-type bent-torsional component Download PDFInfo
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- CN105880940A CN105880940A CN201610247075.9A CN201610247075A CN105880940A CN 105880940 A CN105880940 A CN 105880940A CN 201610247075 A CN201610247075 A CN 201610247075A CN 105880940 A CN105880940 A CN 105880940A
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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
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
Abstract
The invention is suitable for the technical field of construction steel structure machining and provides a method for manufacturing a box-type bent-torsional component. The method comprises the following steps that (1) a final assembly jig frame is arranged; (2) part lofting, blanking and splicing are conducted; (3) a lower wing plate is fixed on the final assembly jig frame through counterweight pressed film forming; (4) webs are positioned and assembled through fitting displacement; (5) transverse partition plates, longitudinal partition plates and longitudinal reinforcement partition plates in the component are assembled and positioned; (6) the transverse partition plates and the longitudinal reinforcement partition plates are welded to the lower wing plate and the webs correspondingly; (7) an upper wing plate is positioned and assembled through counterweight pressed film forming; (8) longitudinal reinforcements on the inner sides of the upper wing plate are subjected to assembly welding by overturning a lower tyre in a segmented mode; (9) four longitudinal main welds are subjected to downward welding in a segmented vertical mode; and (10) dimensions are detected in a divided reset mode, and main points are controlled. The manufacturing efficiency and precision of the box-type bent-torsional component can be greatly improved, firer correction amount is greatly reduced, the surface of a product is smooth and attractive in shape, consumption of manpower and auxiliary materials is reduced, the manufacturing period is shortened, and the manufacturing cost is reduced.
Description
Technical field
The invention belongs to construction steel structure processing technique field, particularly relate to a kind of box bending component manufacturer
Method.
Background technology
Along with the raising of people's aesthetic level, various structures are complicated, and steel building handsome in appearance constantly goes out
Downtown urban land now.Traditional linear type and single type space structure cannot meet design requirement, case
Type bending component act as key player, and it has not only played the material behavior of steel, and strength is with soft and graceful especially
Combination, obtained the favor of high-end construction investment person.The required precision that general box bending component manufactures is high,
Difficulty of processing is big, and the manufacturing cycle is long, and used device and cost of labor are high.
Box bending component manufacture method of the prior art has a following two:
1) wing web set up three-dimensional orthopedic moulding bed according to bending coordinate dimension and on moulding bed, use fairing by flame
Scheme control wing web bending shape, set up box bending component general assembly solid moulding bed the most again, and
Moulding bed realizes the overall spelling welding of box component.
Box bending component wing web uses this fairing by flame technique to be only capable of making wing web in terms of bending shaping
Tend to approximation shape, it is impossible to meet the required precision of bending, also need to when component general assembly adjust by external force
Bending precision, this schemes waste substantial amounts of moulding bed material, adds the time of component manufacturing process, adds
Cost of labor and production cycle and be unfavorable for batch production.
2) bending wing web is used the Samsung thick o ing of roller trigger, then use hydraulic press local directed complete set, afterwards
Set up box bending component general assembly solid moulding bed again, and on moulding bed, realize the overall spelling welding of box component.
Box bending component wing web uses this Samsung roller trigger roller to make shape and hydraulic press roll forming process,
Wing web precision controlling in terms of bending shaping is inadequate, also need to rectify by external force or firer when component general assembly
The method of shape adjusts bending precision, and this scheme increases the manufacturing process of component, extends manufacture cycle, wastes
Equipment investment and take the resources of production, greatly reduces the make efficiency of component, adds cost of labor.
Therefore, both the above process can not meet box bending component low cost, high efficiency, in high precision
Manufacture requirements, based on existing technical scheme, the manufacturer of a kind of brand-new box bending component need to be provided
Method.
Summary of the invention
The technical problem to be solved is to provide a kind of low cost, high efficiency and high-precision box
Bending component manufacture method.
The present invention is achieved in that a kind of box bending component manufacture method, comprises the following steps:
(1) general assembly moulding bed is arranged；
(2) part setting-out, blanking and splicing；
(3) lower wing plate uses counterweight press mold moulding process to fix on general assembly moulding bed；
(4) assembling of web matching displacement location is with fixing；
(5) assembling localization of internal diaphragm plate and longitudinal reinforcement dividing plate；
(6) diaphragm plate, longitudinal reinforcement dividing plate and lower wing plate, the welding of web；
(7) counterweight press mold molding location fit on wing plate is used；
(8) at the inner side welding equipment longitudinal direction reinforcement dividing plate of upper flange after under segmentation, tire stands up.
Further, in described step (1): use steel plate to lay steel platform, support two longitudinal edges and use
Vertical supporting made by shaped steel, it is ensured that steel platform and the stability of moulding bed；Plate platform marks bending component four
The ground line-transect at each control point of bar longitudinal edge and two ends cutting surplus line, and loading blunderbuss point labelling is struck in relevant position
D coordinates value and coordinate numbering, moulding bed set up after in spatial warping state.
Further, in described step (3): lower wing plate is winched on general assembly moulding bed temporary support in freedom
State is placed, and by the Analysis of toughness to lower wing plate, uses counterweight to be compression molded into lower wing plate on general assembly moulding bed
Type technique positions；Lower wing plate is on general assembly moulding bed during the molding of counterweight pressing mold, and two longitudinal edge control point are adopted
Test edge point weldering location with the mode limit pressing mold frontier inspection of ceiling hammer, control plumb bob suspension centre and the ground sample subpoint of longitudinal edge
Overlap, make lower wing plate lower surface fix with general assembly moulding bed entirety spot welding.
Further, described step (4) comprises the following steps:
(4.1) mode that web uses chain and jack to assist makes web be fitted along bottom wing edges of boards curve
Displacement is assembled, and web assembles with the positioning set square inspection of bottom wing edges of boards below；
(4.2) mode that web top uses positioning set square and plumb bob to hang ground sample check each control point, top with
Ground sample subpoint overlaps, and with location steel bar, web upper edge carries out with 3 D stereo moulding bed spot welding and be connected and consolidate
Fixed.
Further, described step (5) comprises the following steps:
(5.1) first diaphragm plate assembly welding is completed；
(5.2) four the angle point D coordinates value of diaphragm plate provided according to drawing draw the assembly line of diaphragm plate；
(5.3) assembly line of longitudinal reinforcement dividing plate is marked according to the decile curved arc line on lower wing plate；
(5.4) first assemble location diaphragm plate according to each assembly line, reassemble longitudinal reinforcement dividing plate, before assembly
Flame gun is used to be warmed oneself by a fire by longitudinal direction reinforcement dividing plate bending.
Further, in step (6): the welding of horizontal position welding longitudinal direction reinforcement dividing plate after the first vertical position welding diaphragm plate of formulation
Sequentially, diaphragm plate and the twin fillet wolt of longitudinal reinforcement dividing plate use the method for segmentation skip welding and use CO2 real
Core welding wire small area analysis multilamellar multiple tracks divides middle welding to control the welding deformation of lower wing plate and web.
Further, in step (7): upper flange need to control upper limb limit and two well when the assembling of counterweight location
Pleurosternal curve degree of fitting, the limit, limit, two opposite sides of upper flange with positioning set square pattern limit matched edge with thousand
Jin top adjusts the relative position of upper flange and web；Then on general assembly moulding bed, weld diaphragm plate and upper flange
Angle welding.
Further, in step (8): under segmentation, tire stands up and draws longitudinal reinforcement dividing plate inside upper flange
Assembly line, longitudinal reinforcement dividing plate after flame has been baked again in strict accordance with the welding procedure of horizontal position welding after first vertical position welding
Require welding, in order to control the welding deformation of upper flange, it is ensured that the light compliance of upper flange outward appearance.
Further, further comprising the steps of after described step (8):
(9) member segments completed is erect placement, four longitudinal joints of component are carried out downhand welding.
Further, further comprising the steps of after described step (9):
(10) simple jig frame is set, is simulated resetting to member segments.
The present invention compared with prior art, has the beneficial effects that: the upper and lower wing plate of the present invention is by configuring pressure
Film forming process is fixing and web is by the assembling of matching location, and is not separately provided mockup mold and carries out it
Plate fairing by hot working shaping or mechanical compaction shape, and decrease substantial amounts of moulding bed material, shorten fabrication cycle, joint
About manufacturing cost, and make efficiency and precision be greatly improved.
Accompanying drawing explanation
Fig. 1 is that in the box bending component process steps 1 that the embodiment of the present invention provides, general assembly moulding bed is arranged
Schematic diagram；
Fig. 2 is lower wing plate location and installation schematic diagram in step 3 of the present invention；
Fig. 3 is step 4 median ventral plate location and installation schematic diagram of the present invention；
Fig. 4 is diaphragm plate and longitudinal reinforcement dividing plate location and installation schematic diagram in step 5 of the present invention and step 6；
Fig. 5 is upper flange location and installation schematic diagram in step 7 of the present invention；
Fig. 6 be in step 8 of the present invention inside upper flange welding equipment longitudinal direction reinforcement dividing plate schematic diagram；
Fig. 7 is four longitudinal seam schematic diagrams of the vertical downhand welding of segmentation in step 9 of the present invention；
Fig. 8 is to arrange moulding bed in step 10 of the present invention component carries out segmentation coordinate points detection schematic diagram.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
As shown in Figures 1 to 6, it is preferably the implementing of box bending component manufacture method process of the present invention
Example, this manufacture method comprises the steps:
(1) general assembly moulding bed is arranged；
(2) part setting-out, blanking and splicing；
(3) lower wing plate 3 uses counterweight press mold moulding process to fix on general assembly moulding bed；
(4) assembling of web matching displacement location is with fixing；
(5) assembling localization of internal diaphragm plate 13 and longitudinal reinforcement dividing plate 12；
(6) diaphragm plate 13, longitudinal reinforcement dividing plate 12 and lower wing plate 3, the welding of web；
(7) counterweight press mold molding location fit on wing plate 14 is used；
(8) at the inner side welding equipment longitudinal direction reinforcement dividing plate 12 of upper flange 14 after under segmentation, tire stands up.
Referring to shown in Fig. 1, general assembly moulding bed in above-described embodiment is arranged, and specifically includes following process:
Use 50～60mm thick steel plates to lay steel platform 1, support two longitudinal edges and use H (200～500)
The 3 D stereo moulding bed 2 of vertical supporting made by the shaped steel of x200, to guarantee steel platform 1 and 3 D stereo moulding bed 2
Stability；Plate platform 1 marks ground line-transect and two end-grain cutting at four each control point of longitudinal edge of bending component
Cut surplus line, and strike loading blunderbuss point labelling D coordinates value and coordinate numbering, 3 D stereo in relevant position
Moulding bed 2 set up after in spatial warping state；Then each control point D coordinates value is used tape measure and longitude and latitude
Instrument detects, and three-dimensional dimension controls within ± 2mm.
The step of part setting-out, blanking and splicing in above-described embodiment is as follows:
1. part setting-out: add certain welding in part direction in length and breadth in advance and shrink and cutting surplus.
2. part cutting mode and mark: bending special-shaped part all uses etc. under Numerical control cutting blanking guarantees
Material precision, part groove all uses semi-automatic cutting to offer.At four angle point marks after wing web part blanking
Respective coordinates numbering in note, in order to distinguish direction during assembling.
3. part splicing: part uses straight line low-angle groove butt welding, needs to control well wing abdomen during welding
Edges of boards length and Diagonal Dimension.Above-mentioned wing web includes upper and lower wing plate and left and right wing plate.
Referring to shown in Fig. 2, the lower wing plate 3 in above-described embodiment is at the 3 D stereo moulding bed 2 of general assembly moulding bed
On location and installation use counterweight stamper forming process fix, specifically, lower wing plate 3 is winched to general assembly moulding bed
On temporary support in free state place, by the Analysis of toughness to lower wing plate 3, on general assembly moulding bed under
Wing plate 3 uses counterweight stamper forming process to position on general assembly moulding bed, at the present embodiment by bottom wing
The upper surface of plate 3 carries out swaging location by adding ballast box 4.Lower wing plate 3 is counterweight on general assembly moulding bed
During pressing mold molding, two longitudinal edge control point need to use the mode limit pressing mold frontier inspection of ceiling hammer to test edge point weldering location,
The plumb bob suspension centre controlling longitudinal edge overlaps with ground sample subpoint.Make on lower wing plate 3 lower surface and general assembly moulding bed
The overall spot welding of 3 D stereo moulding bed 2 is fixed.
In above-described embodiment, the location and installation of lower wing plate 3 is not separately provided mockup mold and it is carried out firer
Orthopedic or mechanical compaction shapes, and decreases substantial amounts of part fire for this and rectifys moulding bed material, cost of labor, system
Make place and reduce the manufacturing cycle, and being directly lower wing plate 3 to be assembled during counterweight press mold molding
Location, swaging is while whether inspection lower wing plate 3 sideline overlaps with sample control point, ground, to determine lower wing plate
The positioning precision of 3 meets manufacture requirements.
Refer to shown in Fig. 3, the web matching displacement location assembling in above-described embodiment, specifically include as follows
Step:
1. left web 8 and the right web 9 of the left and right sides uses chain 5 to make a left side with the mode of jack 6 auxiliary
Web 8 and right web 9 are fitted displacement assembling, left web 8 abdomen following, right along lower wing plate 3 limit curve
Plate 9 assembles with positioning set square 7 inspection of lower wing plate 3 limit below.
The mode that the most left web 8 and right web 9 top use positioning set square 7 and plumb bob to hang ground sample is checked
Each control point, limit overlaps with ground sample subpoint, and is stood with three-dimensional left and right web upper edge with location steel bar 10
Body moulding bed 2 carries out spot welding and connects fixing.
The location assembling process of above-mentioned left web 8 and right web 9, is not separately provided mockup mold to it
Carry out fire rectify shape and mechanical compaction shape, decrease for this substantial amounts of part fire rectify moulding bed material,
Cost of labor, manufacturing field and reduction manufacturing cycle, and left web 8 and right web 9 use chain with
The mode of jack auxiliary makes left web 8 and right web 9 be fitted displacement assembling along lower wing plate 3 limit curve,
Assemble while checking whether left web 8 and right web 9 upper sideline overlap with sample control point, ground, it has been determined that
The positioning precision of left web 8 and right web 9 meets manufacture requirements.
Please referring collectively to shown in Fig. 4, above-described embodiment assembles on lower wing plate 3 and web localization of internal horizontal
Dividing plate 13 and longitudinal reinforcement dividing plate 12, it specifically includes following steps:
First diaphragm plate 13 assembly welding is completed.
2. 13 4 the angle point D coordinates value of diaphragm plate provided according to drawing draw the assembly line of diaphragm plate 13.
3. the assembling of longitudinal reinforcement dividing plate 12 is marked according to longitudinal reinforcement decile curved arc line on lower wing plate 3
Line.
4. first assemble location diaphragm plate 13 according to each assembly line, reassemble longitudinal reinforcement dividing plate 12, in assembling
Longitudinal direction reinforcement dividing plate 12 is warmed oneself by a fire bending by front employing flame gun, makes longitudinal reinforcement dividing plate 12 in bending.
After diaphragm plate 13 and longitudinal reinforcement dividing plate 12 location and installation complete, then diaphragm plate 12, longitudinal direction are added
Muscle dividing plate 13 welds with lower wing plate 3, wing plate, particularly as follows: formulate horizontal position welding after first vertical position welding diaphragm plate 13
The welding sequence of longitudinal reinforcement dividing plate 12, diaphragm plate 13 uses with the twin fillet wolt of longitudinal reinforcement dividing plate 12
The method of segmentation skip welding and employing CO2 solid core welding wire small area analysis multilamellar multiple tracks divide middle welding to control lower wing plate 3
With left abdomen 8, the welding deformation of right web 9.
Above-mentioned diaphragm plate 13, longitudinal reinforcement dividing plate 12 with the purpose of lower wing plate 3, the welding procedure of web are
In order to make welding stress mutually support with the bounce-back internal stress that lower wing plate 3, web use external force imposed deformation to produce
Disappear, required precision can be met with the bending size of control member.
Please referring collectively to shown in Fig. 5, above-described embodiment uses counterweight pressing mold molding location fit on wing plate 14,
Specifically, in the present embodiment, upper flange 14 needs to control when using ballast box 4 to carry out the assembling of counterweight location
Good upper limb limit and the left web in both sides 8 and the curve degree of fitting of right wing plate 9, the limit, limit, two opposite sides of upper flange 14
The relative position of upper flange 14 and web is adjusted, then with positioning set square 7 pattern limit matched edge jack
General assembly moulding bed welds the angle welding of diaphragm plate 13 and upper flange 14, the liner groove of four longitudinal edges of component
Weld seam medicated core CO2 welding wire bottoming is welded, and weld bead height is slightly below mother metal surface.Component termination uses location
Set square 7 is welded and fixed, to ensure the Diagonal Dimension of component port；Add 3 in the middle of component port to 4 roads
Vertical supporting is to ensure upper flange and the opening size of lower wing plate.
Referring to shown in Fig. 6, after in above-described embodiment, under segmentation, tire stands up, inside upper flange 14, welding equipment is longitudinal
The detailed process of reinforcement dividing plate 12 is: under segmentation, tire stands up and draws longitudinal reinforcement dividing plate inside upper flange 14
The assembly line of 12, reassembles after the first flame curved of longitudinal reinforcement dividing plate 12；Due to now upper flange 14 down,
Contacting without fixing with ground, the longitudinal reinforcement dividing plate 12 inside upper flange 14 is when welding, in strict accordance with elder generation
The welding process requirement welding of horizontal position welding after vertical position welding, in order to control the welding deformation of upper flange 14, it is ensured that upper flange
The light compliance of 14 outward appearances.
Refer to shown in Fig. 7, after under segmentation in the above-described embodiments, tire stands up inside upper flange 14 welding equipment
After longitudinal reinforcement dividing plate 12 completes, the vertical placement of member segments that will complete, four of component are indulged
While formulate rational welding sequence according to direction of twist, CO2 flux-cored wire is used to carry out downhand welding longitudinal seam
To guarantee weldquality and appearance requirement.
Refer to shown in Fig. 8, after four longitudinal seams of vertical for member segments downhand welding are completed, carry out point
Duan Fuwei size detection and key control point, detailed process is: arrange simple jig frame, and member segments is carried out mould
Intend resetting；To the flaw detection of four longitudinal edges of component qualified after polish weld seam；Use four to component two ends of total powerstation
Angle point measures；In the middle of four longitudinal edges of component, 3 control point of each extraction measure, priority control two ends
The coordinate figure of four angle points；By component ends length and width, Diagonal Dimension error control in ± 3mm scope
In, Eligibility requirements can be reached.
In sum, the box bending component manufacture method of the present invention be segmentation directly on general assembly moulding bed assemble,
Wing plate overall counterweight pressing mold molding on general assembly tire, web employing jack and chain auxiliary Fast Fitting location,
The welding procedure optimizing internal structure makes wing web external force force stress to be cancelled out each other with welding stress, thus greatly
Shorten greatly installation time and the cost of labor of welding deformation rectification of component.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (10)
1. a box bending component manufacture method, it is characterised in that comprise the following steps:
(1) general assembly moulding bed is arranged；
(2) part setting-out, blanking and splicing；
(3) lower wing plate uses counterweight press mold moulding process to fix on general assembly moulding bed；
(4) assembling of web matching displacement location is with fixing；
(5) assembling localization of internal diaphragm plate and longitudinal reinforcement dividing plate；
(6) diaphragm plate, longitudinal reinforcement dividing plate and lower wing plate, the welding of web；
(7) counterweight press mold molding location fit on wing plate is used；
(8) at the inner side welding equipment longitudinal direction reinforcement dividing plate of upper flange after under segmentation, tire stands up.
2. box bending component manufacture method as claimed in claim 1, it is characterised in that in step (1)
In: use steel plate to lay steel platform, support two longitudinal edges and use shaped steel to make vertical supporting, it is ensured that steel platform with
The stability of moulding bed；Plate platform marks ground line-transect and the two ends at four each control point of longitudinal edge of bending component
Cutting surplus line, and loading blunderbuss point labelling D coordinates value and coordinate numbering is struck in relevant position, moulding bed is taken
If in spatial warping state after complete.
3. box bending component manufacture method as claimed in claim 1, it is characterised in that in described step
(3) in: winch to lower wing plate place in free state, by lower wing plate on general assembly moulding bed temporary support
Analysis of toughness, uses counterweight stamper forming process to position lower wing plate on general assembly moulding bed；Lower wing plate exists
On general assembly moulding bed during the molding of counterweight pressing mold, two longitudinal edge control point use the mode limit pressing mold frontier inspection of ceiling hammer
Testing edge point weldering location, the plumb bob suspension centre controlling longitudinal edge overlaps with ground sample subpoint, makes lower wing plate lower surface with total
Dress moulding bed entirety spot welding is fixed.
4. the box bending component manufacture method as described in claim 1 or 3, it is characterised in that described step
Suddenly (4) comprise the following steps:
(4.1) mode that web uses chain and jack to assist makes web be fitted along bottom wing edges of boards curve
Displacement is assembled, and web assembles with the positioning set square inspection of bottom wing edges of boards below；
(4.2) mode that web top uses positioning set square and plumb bob to hang ground sample check each control point, top with
Ground sample subpoint overlaps, and with location steel bar, web top carries out with 3 D stereo moulding bed spot welding and be connected and fix.
5. box bending component manufacture method as claimed in claim 1, it is characterised in that described step (5)
In comprise the following steps:
(5.1) first diaphragm plate assembly welding is completed；
(5.2) four the angle point D coordinates value of diaphragm plate provided according to drawing draw the assembly line of diaphragm plate；
(5.3) assembly line of longitudinal reinforcement dividing plate is marked according to the decile curved arc line on lower wing plate；
(5.4) first assemble location diaphragm plate according to each assembly line, reassemble longitudinal reinforcement dividing plate, before assembly
Flame gun is used to be warmed oneself by a fire by longitudinal direction reinforcement dividing plate bending.
6. the box bending component manufacture method as described in claim 1 or 5, it is characterised in that in step
(6) in: the welding sequence of horizontal position welding longitudinal direction reinforcement dividing plate after the first vertical position welding diaphragm plate of formulation, diaphragm plate adds with longitudinal
The twin fillet wolt of muscle dividing plate uses the method for segmentation skip welding and uses CO2 solid core welding wire small area analysis multilamellar multiple tracks
In point, welding controls the welding deformation of lower wing plate and web.
7. box bending component manufacture method as claimed in claim 1, it is characterised in that in step (7)
In: upper flange need to control upper limb limit and two pleurosternal curve degrees of fitting well when the assembling of counterweight location, upper limb
The limit, limit, two opposite sides of plate positioning set square pattern limit matched edge jack adjusts the phase of upper flange and web
To position；Then on general assembly moulding bed, weld the angle welding of diaphragm plate and upper flange.
8. box bending component manufacture method as claimed in claim 1, it is characterised in that in step (8)
In: under segmentation, tire stands up the assembly line drawing longitudinal reinforcement dividing plate inside upper flange, longitudinal reinforcement dividing plate warp
Cross after flame has been baked again in strict accordance with the welding process requirement welding of horizontal position welding after first vertical position welding, in order to control upper flange
Welding deformation, it is ensured that the light compliance of upper flange outward appearance.
9. box bending component manufacture method as claimed in claim 1, it is characterised in that in described step
(8) the most further comprising the steps of:
(9) member segments completed is erect placement, four longitudinal joints of component are carried out downhand welding.
10. box bending component manufacture method as claimed in claim 9, it is characterised in that in described step
Suddenly further comprising the steps of after (9):
(10) simple jig frame is set, is simulated resetting to member segments.
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| CN109339466B (en) * | 2018-11-23 | 2024-01-26 | 中冶建工集团有限公司 | Large-section twisted steel box girder assembling jig frame, assembling ejection device and processing method |
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| CN110936104A (en) * | 2019-06-26 | 2020-03-31 | 浙江精工钢结构集团有限公司 | Manufacturing method of space torsion box type node |
| 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 |
| CN112548503A (en) * | 2020-12-06 | 2021-03-26 | 中国二冶集团有限公司 | Manufacturing and mounting method of variable-cross-section thin-wall twisted box-type structure |
| CN112548503B (en) * | 2020-12-06 | 2024-01-05 | 中国二冶集团有限公司 | Manufacturing and mounting method for variable-section thin-wall twisted box-type structure |
| CN115365690A (en) * | 2021-05-19 | 2022-11-22 | 南通振华重型装备制造有限公司 | Construction method of large-scale steel bridge S690 high-strength steel large-section box type arch rib |
| CN114855997A (en) * | 2022-04-13 | 2022-08-05 | 潮峰钢构集团有限公司 | Complex twisted thin plate decoration component based on annular space structure and assembling method thereof |
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