CN103028914B - Method for manufacturing steel box girder curve plate - Google Patents
Method for manufacturing steel box girder curve plate Download PDFInfo
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- CN103028914B CN103028914B CN201210579101.XA CN201210579101A CN103028914B CN 103028914 B CN103028914 B CN 103028914B CN 201210579101 A CN201210579101 A CN 201210579101A CN 103028914 B CN103028914 B CN 103028914B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 80
- 239000010959 steel Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 127
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 239000003351 stiffener Substances 0.000 claims description 74
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
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Abstract
The invention discloses a method for manufacturing a curve plate, in particular to a method for manufacturing a steel box girder curve plate. The invention provides a method for manufacturing a curve plate of a steel box girder, which can reduce the correction amount of a finished component or not, and the curve plate is subjected to supplementary control of welding shrinkage in advance because a method of internal release and external release is adopted in a rolled steel plate, namely the inner arc radius of an inner arc plate is amplified, the outer arc radius of an outer arc plate is reduced, and the curve plate is subjected to supplementary control of the welding shrinkage in advance. Thus, during the subsequent welding process, the shrinkage of the welding is just compensated by the reserved compensation amount of the part. The size of the finally formed steel box girder curved plate is closer to the designed size, so that the correction amount is reduced or even no correction is needed. The splicing of the curve plate and the welding of the stiffening ribs can be carried out on the anti-deformation jig frame, and the compensation amount is reserved on the clamping arc surface of the anti-deformation jig frame, so that the curve plate can be operated according to the radian during rolling, and the subsequent welding shrinkage is effectively compensated.
Description
Technical field
The present invention relates to a kind of manufacture method for curve plate, especially a kind of manufacture method for curve plate of steel case girder.
Background technology
Steel box-girder because structure is simple, the reason such as be easy to manufacture, wind resistance is good and be widely used in large bridge, bridge appearance design is mainly streamlined flat wing, and base plate mostly is gradient slope type or shaped form, and installs elongated ribbed stiffener additional.Common steel box-girder base plate adopts hyperbola design, requires high to welding the Deformation control brought in manufacturing process.
Welding deformation is inevitable in welding manufacture, and it not only affects presentation quality and the dimensional accuracy of structure, and has a strong impact on the mechanical property of structure, reduces structural-load-carrying capacity.Especially, in curvilinear structures welding, because spelling and rectification difficulty are comparatively large, once deflection is slightly large, steel box-girder reasonable integral structure will be affected, even scrap full wafer steel box-girder.
Steel box-girder curve ruler steel plate is welded with rectangular ribbed stiffener of putting more energy into, and weld seam continuity and intensive promote, and weld seam linear energy are increased, the horizontal and vertical generation of steel plate comparatively macrobending stress, thus cause steel plate bending to be out of shape.
Steel plate bending usually adopts and first rolls or compaction curve plate, after do to support and fixedly carry out assembled method, after having welded, because controllability is strong, every part deformation of member amount is different, all needs rectification, takes time and effort.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of manufacture method for curve plate of steel case girder reducing finished product member correct amount or do not correct.
The present invention solves the manufacture method for curve plate of steel case girder that its technical problem adopts, and comprises the following steps:
A, to needing the steel plate that rolls to cut by Len req and holding butting grooves successfully;
B, roll by design direction the steel plate of well cutting, the steel plate rolled is divided into inner arc plate and outer arc plate two class, and inner arc plate is the steel plate that ribbed stiffener is welded on intrados after whole completion of processing; Outer arc plate is the steel plate that ribbed stiffener is welded on extrados after whole completion of processing; When rolling, the radian of steel plate need control in the following manner:
If the steel plate rolled is inner arc plate, then radius of the radian in the design that the interior radius of the radian rolled need be greater than inner arc plate, its difference is the welding contracted quantity of inner arc plate;
If the steel plate rolled is outer arc plate, then the outer radius of the radian rolled need be less than the outer radius of the radian of design of outer arc plate, and its difference is the welding contracted quantity of outer arc plate;
C, rolled steel plate carried out to axis welding splicing and circumference welding splicing, thus form the arc plate of required size; Axially welding splicing namely to refer between inner arc plate with inner arc plate along its length longitudinal spliced become suitable length, or longitudinal spliced in suitable length along its length between outer arc plate and outer arc plate; Circumference welding splicing refers to that inner arc plate and outer arc plate carry out horizontally-spliced in its arc surface circumferential direction, thus the arc surface that formation one is larger;
D, to weld at camber line lining out spelling ribbed stiffener, finally form steel box-girder curve ruler.
Further, before carrying out C, D step, make reversely deformed jig frame, reversely deformed jig frame is provided with clamping arcwall face, the arc plate underside shape in the shape of this clamping arcwall face and step C matches; In step C, reversely deformed jig frame is utilized to be spliced by rolled steel plate clamping; In D step, reversely deformed jig frame is utilized to be clamped by arc plate, spelling ribbed stiffener of then ruling.
Further, described reversely deformed jig frame comprises base plate and controls backing plate, and described control backing plate arranges a row on base plate, and the end face of all control backing plates forms clamping arcwall face.
Further, described control backing plate is Collapsible structure.
Further, in step C, first carry out axis and weld splicing, and then carry out circumference welding splicing.
Further, after D step, also comprise F step: welded, take out steel box-girder curve ruler, measure, check that whether radian is suitable, if improper, then steel box-girder curve ruler is corrected, and by correction value, the welding contracted quantity in step B is revised.
Further, in D step, ribbed stiffener carries out welding by row and arranges, in welding process, welding direction during all weld seam welding is all consistent.Carry out welding layout by row and be arranged at least one row by all ribbed stiffeners at arc plate.
Further, in D step, ribbed stiffener is provided with twice weld seam along its length, be called left weld seam and backhand welding seam, and the side of left weld seam be called left side, in welding process, first weld the left weld seam of all ribbed stiffeners, and then weld the backhand welding seam of all ribbed stiffeners.
Further, when welding the left weld seam of all ribbed stiffeners, following order is adopted to weld: the left weld seam first welding leftmost side ribbed stiffener; And then weld the left weld seam of rightmost side ribbed stiffener; Then the left weld seam of ribbed stiffener on the right side of in the of second is welded; Weld the left weld seam of ribbed stiffener on the left of in the of second again; Weld the left weld seam of all ribbed stiffeners by that analogy.
Further, when welding the backhand welding seam of all ribbed stiffeners, following order is adopted to weld: the backhand welding seam first welding rightmost side ribbed stiffener; And then weld the backhand welding seam of leftmost side ribbed stiffener; Then the backhand welding seam of ribbed stiffener on the left of in the of second is welded; Weld the backhand welding seam of ribbed stiffener on the right side of in the of second again; All ribbed stiffener backhand welding seams are welded by that analogy.
The invention has the beneficial effects as follows: owing to putting the method for outer receipts in rolling steel plate and have employed, namely radius of the radian in inner arc plate is amplified, the outer radius of the radian of outer arc plate is reduced, welding contracted quantity replenishment control is in advance carried out to curve ruler.Like this in welding process afterwards, the amount of contraction of welding is just in time compensated by this part reserved compensation rate.The steel box-girder curve ruler size of final formation, more close to the size of design, does not even need to correct because this reducing correct amount.The splicing of curve ruler and the welding of ribbed stiffener all can be carried out on reversely deformed jig frame, and the clamping arcwall face of reversely deformed jig frame has reserved compensation rate, and curve ruler can be operated according to radian when rolling, thus the welding contraction that effective compensation is follow-up.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that inner arc plate of the present invention adds man-hour;
Fig. 2 is the schematic diagram that outer arc plate of the present invention adds man-hour;
Fig. 3 be inner arc plate roll schematic diagram;
Fig. 4 be outer arc plate roll schematic diagram;
Fig. 5 is the schematic diagram of reversely deformed jig frame;
Fig. 6 is the welding sequence schematic diagram of D step;
Parts, position and numbering in figure: inner arc plate 1, outer arc plate 2, ribbed stiffener 3, reversely deformed jig frame 4, base plate 5, control backing plate 6, fixing chuck plate 7, horizontal fixed structure 8, the actual crimped thread of inner arc plate 9, inner arc plate design crimped thread 10, the actual crimped thread 11 of outer arc plate, outer arc plate design crimped thread 12.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the present invention includes following steps:
A, to needing the steel plate that rolls to cut by Len req and holding butting grooves successfully; Because this body length of steel box-girder curve ruler is longer, rolled effect length, be difficult to once roll form, therefore generally at length direction, steel plate to be cut off, the axial direction of length direction and curling rear arc, in follow-up technique, each several part is welded into an entirety again, namely by a large cambered surface segmentation cans.
B, roll by design direction the steel plate of well cutting, steel box-girder curve ruler is generally in hyperbolia, and the steel plate therefore rolled is divided into inner arc plate 1 and outer arc plate 2 liang of classes, and inner arc plate 1 is the steel plate that ribbed stiffener 3 is welded on intrados after whole completion of processing; Outer arc plate 2 is the steel plate that ribbed stiffener 3 is welded on extrados after whole completion of processing; When rolling, the radian of steel plate need control in the following manner:
If the steel plate rolled is inner arc plate 1, then radius of the radian in the design that the interior radius of the radian rolled need be greater than inner arc plate 1, its difference is the welding contracted quantity of inner arc plate 1; In the design of inner arc plate 1, radius of the radian to be after whole steel box-girder curve ruler completion of processing radius of the radian in inner arc plate 1 part, this technique is shown in Figure 3, the inner arc radius of the actual crimped thread 9 of inner arc plate is greater than inner arc plate design crimped thread 10 inner arc radius, follow-up welding effect of contraction can make radius of the radian in the reality of inner arc plate 1 level off to design in radius of the radian, the actual crimped thread 9 of the inner arc plate namely in Fig. 3 level off to inner arc plate design crimped thread 10;
If the steel plate rolled is outer arc plate 2, then the outer radius of the radian rolled need be less than the outer radius of the radian of design of outer arc plate 2, and its difference is the welding contracted quantity of outer arc plate 2; The outer radius of the radian of design of outer arc plate 2 is the outer radius of the radian of outer arc plate 2 part after whole steel box-girder curve ruler completion of processing, this technique is shown in Figure 4, the outer arc radius of the actual crimped thread 11 of outer arc plate is greater than inner arc plate design crimped thread 12 inner arc radius, the outer radius of the radian of the reality of outer arc plate 2 can be made to level off to the outer radius of the radian of design at follow-up welding effect of contraction, the actual crimped thread 11 of the interior outer arc plate namely in Fig. 3 levels off to outer arc plate and designs crimped thread 12;
The welding contracted quantity of inner arc plate 1 and outer arc plate 2 confirms by following method, and can rule of thumb revise:
1, butt welded seam cross-direction shrinkage approximation and formula:
y=1.01×e^（0.0464x）
In above formula: y=shrinks approximation; E=2.718282; X=thickness of slab.
2, following table is the approximation (mm/m) of weld seam longitudinal contraction deflection
| Butt weld | Continuous fillet weld | Interval angle weld seam |
| 0.15～0.3 | 0.2～0.4 | 0～0.1 |
Note: data represented in table are the longitudinal contraction deflections be approximately at width in the welded seam area of 15 times of thicknesss of slab, are applicable to the low carbon steel plate of intermediate gauge
3, by the welding contracted quantity of the above-mentioned weld seam cross-direction shrinkage determined and weld seam longitudinal contraction determination radius of the radian.
C, rolled steel plate carried out to axis welding splicing and circumference welding splicing, thus form the arc plate of required size; Axially welding splicing is spliced at axial direction by inner arc plate 1 and inner arc plate 1, and outer arc plate 2 and outer arc plate 2 splice at axial direction; Circumference welding splicing is spliced in circumferential direction by inner arc plate 1 and outer arc plate 2; The arc plate that final formation one is overall;
D, to weld at camber line lining out spelling ribbed stiffener 3, finally form steel box-girder curve ruler.Welding is by reducing the welding of heat input method order.In this step, welding deformation amount is comparatively large, but due in step B inner arc plate 1 position and outer arc plate 2 position all reserved deflection, the contraction of therefore welding can make steel box-girder curve ruler level off to the requirement of design.Now can suitably correct according to specific circumstances; When deviation also can not be corrected in the reasonable scope.
As can be seen from above-mentioned technique, owing to putting the method for outer receipts in rolling steel plate and have employed, namely radius of the radian in inner arc plate 1 is amplified, the outer radius of the radian of outer arc plate 2 is reduced, welding contracted quantity replenishment control is in advance carried out to curve ruler.Like this in welding process afterwards, the amount of contraction of welding is just in time compensated by this part reserved compensation rate.The steel box-girder curve ruler size of final formation, more close to the size of design, does not even need to correct because this reducing correct amount.
In order to better be fixed location when welding, as depicted in figs. 1 and 2, before carrying out C, D step, make reversely deformed jig frame 4, reversely deformed jig frame 4 is provided with clamping arcwall face, the arc plate underside shape in the shape of this clamping arcwall face and step C matches; In step C, reversely deformed jig frame 4 is utilized to be spliced by rolled steel plate clamping; In D step, reversely deformed jig frame 4 is utilized to be clamped by arc plate, spelling ribbed stiffener 3 of then ruling.Clamping arcwall face on reversely deformed jig frame 4 and the arc plate underside shape in step C match, and the lower surface of arc plate is the arcwall face not welding ribbed stiffener 3, relative with the face of welding ribbed stiffener 3.Clamping arcwall face has outer arc plate 2 arc radius identical with inner arc plate 1, and the part namely clamping arcwall face corresponding with outer arc plate 2 has the arc radius identical with outer arc plate 2, and the part corresponding with inner arc plate 1 has the identical arc radius of inner arc plate 1.Like this, when fixing inner arc plate 1, outer arc plate 2 or arc plate, just can ensure the radian of fixation, make the arc radius of inner arc plate 1, outer arc plate 2 or arc plate keep reserved offset, receive contracting with butt welding in welding and compensate.
Concrete, as shown in Figure 5, described reversely deformed jig frame 4 comprises base plate 5, controls backing plate 6, fixing chuck plate 7 and horizontal fixed structure 8, described control backing plate 6 arranges a row on base plate 5, and the end face of all control backing plates 6 forms clamping arcwall face, fixing chuck plate 7 is arranged on and controls on backing plate 6, and all control backing plates 6 link together by horizontal fixed structure 8.When welding, inner arc plate 1, outer arc plate 2 or arc plate being fitted in and controlling, on the clamping arcwall face that formed of backing plate 6, then to utilize fixing chuck plate 7 to clamp inner arc plate 1, outer arc plate 2 or arc plate.Then weld.Each like this parts just can be located accurately, make welding operation convenient.Control backing plate 6 and can be set to Collapsible structure, so just can control the radian clamping arcwall face according to the height controlling backing plate 6, handled easily.
Concrete, in step C, first carry out axis and weld splicing, and then carry out longitudinal measure splicing.First carry out axially welding splicing and horizontally-spliced longitudinal anti-deformation that effectively can control adjustment unit plate.Omnibearing inspection can be carried out to splicing welding joint and comprise carrying out flaw detection, ensure weldquality.Be conducive to utilizing reversely deformed jig frame to carry out the spelling of D step.
Concrete, as shown in Figure 6, in D step, welding is by reducing the welding of heat input method order, and its method is as follows:
1, in D step, ribbed stiffener 3 carries out welding by row and arranges, ribbed stiffener 3 is generally arranged in a row on arc plate, and in welding process, welding direction during all weld seam welding is all consistent.
2, in D step, ribbed stiffener 3 is provided with twice weld seam along its length, is called left weld seam and backhand welding seam, and the side of left weld seam is called left side, in welding process, first weld the left weld seam of all ribbed stiffeners 3, and then weld the backhand welding seam of all ribbed stiffeners 3.
3, when welding the left weld seam of all ribbed stiffeners 3, following order is adopted to weld: the left weld seam first welding leftmost side ribbed stiffener 3; And then weld the left weld seam of rightmost side ribbed stiffener 3; Then the left weld seam of ribbed stiffener 3 on the right side of in the of second is welded; Weld the left weld seam of ribbed stiffener 3 on the left of in the of second again; Weld the left weld seam of ribbed stiffener 3 on the left of in the of the 3rd again; Weld the left weld seam of ribbed stiffener 3 on the right side of in the of the 3rd again; All left weld seams of ribbed stiffener 3 are welded by that analogy.
4, when welding the backhand welding seam of all ribbed stiffeners 3, following order is adopted to weld: the backhand welding seam first welding rightmost side ribbed stiffener 3; And then weld the backhand welding seam of leftmost side ribbed stiffener 3; Then the backhand welding seam of ribbed stiffener 3 on the left of in the of second is welded; Weld the backhand welding seam of ribbed stiffener 3 on the right side of in the of second again; Weld the backhand welding seam of ribbed stiffener 3 on the right side of in the of the 3rd again; Weld the backhand welding seam of ribbed stiffener 3 on the left of in the of the 3rd again; All ribbed stiffener 3 backhand welding seams are welded by that analogy.
Figure 6 shows that the welding example of 4 ribbed stiffeners 3,1., 2., 3., 4., 5., 6., 7. and 8. the welding direction when direction of arrow is weld seam welding in figure is wherein the welding sequence of weld seam, namely from being 1. welded to 8..Ribbed stiffener 3 is at U-shaped rib weldment, have during weld seam welding and produce perverted tendency, arrange rational welding sequence, the tendency producing torsional deformation and lateral thrust distortion can be reduced, must carry out on the positioner of anti-welding deformation during U-shaped rib weldment welding, as shown in Figure 6, all keep welding direction consistent during all weld seam welding, arranging rational welding sequence according to producing perverted tendency when U-shaped rib quantity and weld seam welding, reducing the tendency producing torsional deformation and lateral thrust distortion.
In order to improve accuracy in batch production, after D step, also comprise F step: welded, take out steel box-girder curve ruler, measure, check that whether radian is suitable, if improper, then steel box-girder curve ruler is corrected, and by correction value, the welding contracted quantity in step B is revised.So not only can correct steel box-girder curve ruler, manufacturing parameter can also be revised, make the steel box-girder curve ruler of subsequent production same size can by more accurate welding contracted quantity, thus better butt welding reception contracting compensates, make follow-up steel box-girder curve ruler without the need to correcting, improve make efficiency, and reduce costs.
Claims (10)
1. manufacture method for curve plate of steel case girder, is characterized in that: comprise the following steps:
A, to needing the steel plate that rolls to cut by Len req and holding butting grooves successfully;
B, roll by design direction the steel plate of well cutting, the steel plate rolled is divided into inner arc plate (1) and outer arc plate (2) two class, inner arc plate (1) for after whole completion of processing ribbed stiffener (3) be welded on the steel plate of intrados; Outer arc plate (2) is that ribbed stiffener (3) is welded on the steel plate of extrados after whole completion of processing; When rolling, the radian of steel plate need control in the following manner:
If the steel plate rolled is inner arc plate (1), then radius of the radian in the design that the interior radius of the radian rolled need be greater than inner arc plate (1), its difference is the welding contracted quantity of inner arc plate (1);
If the steel plate rolled is outer arc plate (2), then the outer radius of the radian rolled need be less than the outer radius of the radian of design of outer arc plate (2), and its difference is the welding contracted quantity of outer arc plate (2);
C, rolled steel plate carried out to axis welding splicing and circumference welding splicing, thus form the arc plate of required size;
D, to weld at camber line lining out spelling ribbed stiffener (3), finally form steel box-girder curve ruler.
2. manufacture method for curve plate of steel case girder as claimed in claim 1, it is characterized in that: before carrying out C, D step, make reversely deformed jig frame (4), (4) are provided with clamping arcwall face to reversely deformed jig frame, and the arc plate underside shape in the shape of this clamping arcwall face and step C matches; In step C, reversely deformed jig frame (4) is utilized to be spliced by rolled steel plate clamping; In D step, reversely deformed jig frame (4) is utilized to be clamped by arc plate, spelling ribbed stiffener (3) of then ruling.
3. manufacture method for curve plate of steel case girder as claimed in claim 2, it is characterized in that: described reversely deformed jig frame (4) comprises base plate (5) and controls backing plate (6), described control backing plate (6) arranges a row on base plate (5), and the end face of all control backing plates (6) forms clamping arcwall face.
4. manufacture method for curve plate of steel case girder as claimed in claim 3, is characterized in that: described control backing plate (6) is Collapsible structure.
5. manufacture method for curve plate of steel case girder as claimed in claim 1, is characterized in that: in step C, first carries out axis and weld splicing, and then carries out circumference welding splicing.
6. manufacture method for curve plate of steel case girder as claimed in claim 1, it is characterized in that: after D step, also comprise F step: welded, take out steel box-girder curve ruler, measure, check that whether radian is suitable, if improper, then steel box-girder curve ruler is corrected, and by correction value, the welding contracted quantity in step B is revised.
7. manufacture method for curve plate of steel case girder as claimed in claim 1, is characterized in that: in D step, and ribbed stiffener (3) carries out welding by row and arranges, in welding process, welding direction during all weld seam welding is all consistent.
8. manufacture method for curve plate of steel case girder as claimed in claim 7, it is characterized in that: in D step, ribbed stiffener (3) is provided with twice weld seam along its length, be called left weld seam and backhand welding seam, and the side of left weld seam is called left side, in welding process, first weld the left weld seam of all ribbed stiffeners (3), and then weld the backhand welding seam of all ribbed stiffeners (3).
9. manufacture method for curve plate of steel case girder as claimed in claim 8, is characterized in that: when welding the left weld seam of all ribbed stiffeners (3), adopts following order to weld: the left weld seam first welding leftmost side ribbed stiffener (3); And then weld the left weld seam of rightmost side ribbed stiffener (3); Then the left weld seam of ribbed stiffener (3) on the right side of in the of second is welded; Weld the left weld seam of ribbed stiffener on the left of in the of second (3) again; All ribbed stiffener (3) left weld seams are welded by that analogy.
10. manufacture method for curve plate of steel case girder as claimed in claim 8 or 9, is characterized in that: when welding the backhand welding seam of all ribbed stiffeners (3), sequentially weld below adopting: the backhand welding seam first welding rightmost side ribbed stiffener (3); And then weld the backhand welding seam of leftmost side ribbed stiffener (3); Then the backhand welding seam of ribbed stiffener (3) on the left of in the of second is welded; Weld the backhand welding seam of ribbed stiffener on the right side of in the of second (3) again; All ribbed stiffener (3) backhand welding seams are welded by that analogy.
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