CN116213980A - Method for controlling full penetration welding deformation of U-shaped rib and bridge deck - Google Patents
Method for controlling full penetration welding deformation of U-shaped rib and bridge deck Download PDFInfo
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- 230000035515 penetration Effects 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 230000002441 reversible effect Effects 0.000 claims abstract description 9
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- 239000000463 material Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 description 6
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
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Abstract
The embodiment of the disclosure relates to a method for controlling full penetration welding deformation of a U-shaped rib and a bridge deck. The method comprises the following steps: setting an inner welding parameter and an outer welding parameter; positioning a plurality of U-shaped ribs on the bridge deck plate, and assembling the bridge deck plate into an orthotropic steel bridge deck plate; synchronous welding is carried out on the inner sides of the U-shaped ribs according to the internal welding parameters; the bridge deck is fixed by utilizing a hydraulic clamping system, and is subjected to pre-reverse deformation; step-by-step welding is carried out on the outer sides of the U-shaped ribs according to the external welding parameters; after the welded temperature of the U-shaped rib and the bridge deck is cooled, loosening the hydraulic clamping system; and respectively carrying out mechanical correction on the bridge deck plate and carrying out local correction on the U-shaped rib and the bridge deck plate until finishing welding deformation and finishing. According to the embodiment of the disclosure, the welding deformation of the U-shaped rib and the bridge deck can be controlled by setting the inner welding parameters and the outer welding parameters and setting the anti-deformation measures to perform mechanical correction.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of bridge manufacture, in particular to a method for controlling full penetration welding deformation of a U-shaped rib and a bridge deck.
Background
The orthotropic steel deck slab has the advantages of light dead weight, large bearing capacity, attractive appearance and the like, and is widely applied to the construction of large and medium-span steel box girder bridges. At present, relevant design specifications of highway bridges and railway bridges all require that U-shaped rib bridge panels adopt single-side groove welding seams with penetration requirements, the penetration requirements are 75% -80% of the thickness of the U-shaped rib panels, welding deformation control is mainly finished through pre-set reverse deformation and post-welding flame correction before welding, and a reverse deformation method is adopted, namely: before welding, clamping the beam by a tooling table and a row of clamps, and applying a reverse load to counteract deformation generated by longitudinal shrinkage of a welding line, wherein the welding deformation of the U-shaped rib steel bridge deck is controlled only by a reverse deformation measure, and sometimes the control effect is difficult to achieve; the flame straightening method is adopted, and aims at the welding deformation generated by the U-shaped rib bridge deck, the existing welding deformation is counteracted by the shrinkage deformation generated by heating and cooling, so that the welding deformation is corrected, but the flame straightening method is realized by a flame straightening worker with rich experience, has higher cost and damages to the steel plate, and is not suitable for popularization and use.
In the related art, with the successful development of U-shaped rib internal welding equipment, the double-sided welding process of the U-shaped rib and the bridge deck plate is adopted, the double-sided welding seam of the U-shaped rib greatly improves the fatigue resistance of the steel bridge deck plate, some steel bridges are provided with the requirement of full penetration welding of the U-shaped rib and the bridge deck plate on the basis of double-sided welding of the U-shaped rib, and the double-sided submerged arc welding full penetration welding process without beveling of the U-shaped rib represents the current advanced process level and has been successfully applied to a plurality of domestic steel bridges. The process realizes full penetration of the U-shaped rib and the panel through high penetration of submerged arc welding, and because the welding line has high energy, compared with the prior single-side groove single-side welding, the welding deformation is larger, the welding deformation of the U-shaped rib bridge panel mainly comprises transverse deformation and longitudinal deformation, and the welding deformation of the U-shaped rib steel bridge panel is particularly important to be controlled.
Accordingly, there is a need to improve one or more problems in the related art as described above.
It is noted that this section is intended to provide a background or context for the technical solutions of the present disclosure as set forth in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
It is an object of embodiments of the present disclosure to provide a method of controlling full penetration weld deformation of a U-shaped rib and a bridge deck, thereby overcoming, at least in part, one or more of the problems due to the limitations and disadvantages of the related art.
According to an embodiment of the present disclosure, there is provided a method of controlling full penetration welding deformation of a U-shaped rib and a bridge deck, the method including:
setting an inner welding parameter and an outer welding parameter;
positioning a plurality of U-shaped ribs on a bridge deck plate, and assembling the U-shaped ribs into an orthotropic steel bridge deck plate, wherein a gap between the U-shaped ribs and the bridge deck plate is not more than 1mm;
synchronous welding is carried out on the inner side of the U-shaped rib according to the internal welding parameters;
the bridge deck is fixed by utilizing a hydraulic clamping system, and preset reverse deformation is carried out on the bridge deck;
step-by-step welding is carried out on the outer sides of the U-shaped ribs according to the external welding parameters;
after the post-welding temperature of the U-shaped rib and the bridge deck plate is cooled to a first preset value, loosening the hydraulic clamping system;
and respectively carrying out mechanical correction on the bridge deck plate, and carrying out local flame correction on the U-shaped rib and the bridge deck plate until finishing welding deformation finishing.
In an embodiment of the disclosure, the internal welding parameters include:
the internal welding material is SU35 (phi 1.6) +SJ101q, the internal welding current is 390-410A, the internal welding voltage is 24-32V, and the internal welding speed is 460-500 mm/min.
In an embodiment of the disclosure, the external welding parameters include:
the external welding material is SU35 (phi 3.2) +SJ101q, the external welding current is 620-640A, the external welding voltage is 28-32V, and the external welding speed is 460-500 mm/min.
In one embodiment of the present disclosure, the step of positioning a plurality of U-shaped ribs on a deck slab, assembling an orthotropic steel deck slab, comprises:
and positioning and assembling the plurality of U-shaped ribs and the bridge deck plate through an assembling jig frame to assemble the orthotropic steel bridge deck plate.
In an embodiment of the disclosure, the step of synchronously welding the inner side of the U-shaped rib according to the inner welding parameter includes:
carrying out level synchronization, homodromous and symmetrical welding on welding seams on the inner sides of the U-shaped ribs by adopting filament submerged arc welding; wherein, the included angle between the welding gun of the internal welding and the bridge deck is 30-60 degrees.
In an embodiment of the disclosure, the step of step-welding the outer side of the U-shaped rib according to the external welding parameter includes:
placing the bridge deck on a ship position overturning jig frame;
after the ship position overturning jig frame is overturned for a second preset value, welding the outer side of one side of the U-shaped rib;
and after the ship position overturning jig frame is overturned by a third preset value, welding the outer side of the other side of the U-shaped rib.
In one embodiment of the disclosure, the step of mechanically correcting the bridge deck includes:
and applying external mechanical force to the bridge deck plates at two sides of the U-shaped rib by using correction equipment according to correction parameters so as to enable the U-shaped rib and the bridge deck plates to generate plastic deformation opposite to the welding deformation direction, thereby eliminating the welding deformation.
In one embodiment of the present disclosure, the correction parameter is obtained according to the distance and thickness of the U-shaped rib and the thickness of the bridge deck.
In one embodiment of the present disclosure, the step of locally correcting the U-shaped rib and the bridge deck includes:
baking the deformation parts of the bridge deck plate and the U-shaped rib by using a partial flame method;
and after baking, preserving heat for a preset period of time for the U-shaped rib and the bridge deck, and naturally cooling to room temperature.
In an embodiment of the disclosure, the abutment surface arches at an angle of 2 ° to 5 °.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
in the embodiment of the disclosure, through the method for controlling the full penetration welding deformation of the U-shaped rib and the bridge deck, on one hand, through setting the inner welding parameter and the outer welding parameter and setting the anti-deformation measure, mechanical correction is performed, so as to achieve the purpose of controlling the welding deformation of the U-shaped rib and the bridge deck. On the other hand, starting from each link of welding the U-shaped rib and the bridge deck plate, the welding deformation of the U-shaped rib and the bridge deck plate can be effectively controlled.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
FIG. 1 illustrates a method step diagram for controlling full penetration weld deformation of a U-shaped rib and a bridge deck in an exemplary embodiment of the present disclosure;
FIG. 2 illustrates a partial schematic view of a U-shaped rib and bridge deck in an exemplary embodiment of the present disclosure;
FIG. 3 illustrates a synchronous, co-directional, symmetrical weld pattern of the weld inside the U-shaped rib in an exemplary embodiment of the present disclosure;
FIG. 4 illustrates a weld pattern of a weld inboard of a U-shaped rib in an exemplary embodiment of the present disclosure;
FIG. 5 illustrates a schematic view of the outboard welding after the ship position flip jig frame is flipped to one side in an exemplary embodiment of the present disclosure;
FIG. 6 illustrates a schematic view of the outboard welding after the ship position flip jig frame is flipped to the other side in an exemplary embodiment of the present disclosure;
FIG. 7 illustrates a layout of a weld bead in an exemplary embodiment of the present disclosure;
fig. 8 illustrates a schematic diagram of mechanical correction of U-shaped rib plate units in an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
In the exemplary embodiment, a method for controlling full penetration welding deformation of a U-shaped rib and a bridge deck is provided first. Referring to fig. 1, the method of controlling the full penetration weld deformation of the U-shaped rib and the bridge deck may include:
step S101: setting an inner welding parameter and an outer welding parameter;
step S102: positioning a plurality of U-shaped ribs on a bridge deck plate, and assembling the U-shaped ribs into an orthotropic steel bridge deck plate, wherein a gap between the U-shaped ribs and the bridge deck plate is not more than 1mm;
step S103: synchronous welding is carried out on the inner side of the U-shaped rib according to the internal welding parameters;
step S104: the bridge deck is fixed by utilizing a hydraulic clamping system, and preset reverse deformation is carried out on the bridge deck;
step S105: step-by-step welding is carried out on the outer sides of the U-shaped ribs according to the external welding parameters;
step S106: after the post-welding temperature of the U-shaped rib and the bridge deck plate is cooled to a first preset value, loosening the hydraulic clamping system;
step S107: and respectively carrying out mechanical correction on the bridge deck plate, and carrying out local flame correction on the U-shaped rib and the bridge deck plate until finishing welding deformation finishing.
According to the method for controlling the full penetration welding deformation of the U-shaped rib and the bridge deck, on one hand, the purpose of controlling the welding deformation of the U-shaped rib and the bridge deck is achieved by setting the inner welding parameter and the outer welding parameter and setting the anti-deformation measure and performing mechanical correction. On the other hand, starting from each link of welding the U-shaped rib and the bridge deck plate, the welding deformation of the U-shaped rib and the bridge deck plate can be effectively controlled.
Next, each portion of the above-described method of controlling the full penetration welding deformation of the U-shaped rib and the bridge deck in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 8.
In one embodiment, the fillet weld parameters include: the internal welding material is SU35 (phi 1.6) +SJ101q, the internal welding current is 390-410A, the internal welding voltage is 24-32V, and the internal welding speed is 460-500 mm/min.
Specifically, in the welding process of the U-shaped rib bridge deck, the internal welding parameters include: the welding material of the inner welding is SU35 (phi 1.6) +SJ101q; the internal welding current is 400+/-10A, the internal welding voltage is 28+/-4V, and the internal welding speed is 80+/-20 mm/min; welding sequence and direction: synchronous, co-directional and symmetrical welding. On the premise of meeting design requirements, welding parameters with the welding line energy as small as possible are selected, so that the area of a welded molding compression zone can be effectively reduced, and the probability of welding deformation is further reduced.
In one embodiment, the external welding parameters include: the external welding material is SU35 (phi 3.2) +SJ101q, the external welding current is 620-640A, the external welding voltage is 28-32V, and the external welding speed is 460-500 mm/min.
Specifically, in the welding process of the U-shaped rib bridge deck, the external welding parameters include: the welding material of the external welding is SU35 (phi 3.2) +SJ101q; the external welding current is 630+/-10A, the external welding voltage is 30+/-2V, and the external welding speed is 480+/-20 mm/min; welding sequence and direction: and the ship positions are symmetrically welded in the same direction. On the premise of meeting design requirements, welding parameters with the welding line energy as small as possible are selected, so that the area of a welded molding compression zone can be effectively reduced, and the probability of welding deformation is further reduced.
In one embodiment, the step of positioning a plurality of U-shaped ribs on a deck slab, assembling an orthotropic steel deck slab, comprises: and positioning and assembling the plurality of U-shaped ribs and the bridge deck plate through an assembling jig frame to assemble the orthotropic steel bridge deck plate.
Specifically, the U-shaped rib and the panel are subjected to dust-free polishing before being assembled. The U-shaped rib polishing system can polish the shop primer in the area of two welding edges of the U-shaped rib at one time, for example, in the area of 30mm of the two welding edges of the U-shaped rib; the automatic dust removal polisher of bull panel accomplishes the work of polishing of a plurality of equipment position line simultaneously, and the dust of polishing is absorbed automatically, for example, the work of polishing of 12 equipment position lines simultaneously.
After polishing, positioning and assembling the U-shaped rib and the bridge deck on the special assembly jig, wherein the assembly gap between the U-shaped rib and the bridge deck is smaller than 1mm, and as shown in fig. 2, the rib feet of the U-shaped rib and the bridge deck form a certain angle, wherein t is the thickness of the U-shaped rib, and alpha is the angle between the rib feet of the U-shaped rib and the bridge deck.
In addition, the U-shaped rib and the bridge deck plate are connected without beveling through the full penetration weld joint.
In one embodiment, the step of synchronously welding the inner side of the U-shaped rib according to the inner welding parameters includes: carrying out level synchronization, homodromous and symmetrical welding on welding seams on the inner sides of the U-shaped ribs by adopting filament submerged arc welding; wherein, the included angle between the welding gun of the internal welding and the bridge deck is 30-60 degrees.
Specifically, as shown in fig. 3, the welding of the fillet weld of the inner side K6 of the U-shaped rib is synchronously and symmetrically performed by adopting filament submerged arc welding, and the welding deformation of the U-shaped rib steel bridge deck plate can be effectively controlled due to the welding of the U-shaped rib welding seams in the same direction, synchronously and symmetrically. In fig. 3, the same reference number is used on the inner side of each U-shaped rib to designate the same welding point on the two inner sides of the U-shaped rib.
In addition, the included angle between the inner welding gun and the bridge deck is a preset value, for example, the included angle between the inner welding gun and the bridge deck is 45 degrees.
In one embodiment, the bridge deck arches at an angle of 2 ° to 5 °.
Specifically, as shown in fig. 4, after the internal welding is completed, the plate unit is pre-deformed on the external welding hydraulic reverse deformation jig frame, namely, the bridge deck is clamped and reversely deformed and arched through the hydraulic clamping system, the arch-forming angle is 2-5 degrees, the pre-deformation amount applied is realized by the adjustable clamp of the plate unit beam section, the pre-deformation amount can be adjusted within a certain range, and the pre-deformation effect is ensured.
In one embodiment, the step of step welding the outer side of the U-shaped rib according to the external welding parameters includes: placing the bridge deck on a ship position overturning jig frame; after the ship position overturning jig frame is overturned for a second preset value, welding the outer side of one side of the U-shaped rib; and after the ship position overturning jig frame is overturned by a third preset value, welding the outer side of the other side of the U-shaped rib.
Specifically, as shown in fig. 5 and 6, when external welding is performed, the ship position overturning jig frame is overturned by a certain angle, then the outer side of one side of the U-shaped rib is welded, the ship position overturning jig frame is overturned to the other side, and the outer side of the other side of the U-shaped rib is welded. FIG. 5 is a schematic view of the ship position flip jig frame after being flipped to one side; fig. 6 is a schematic view of the ship position overturning jig frame after being overturned to the other side, wherein 1 and 1' respectively correspond to two outer sides of the same U-shaped rib, and similarly, 2 and 2', 3 and 3', 4 and 4', and 5' respectively correspond to two outer sides of the same U-shaped rib.
In addition, the U-shaped rib external welding adopts thick wire submerged arc welding ship position welding. Under the condition that the U-shaped rib is not beveled, the full penetration of the U-shaped rib bridge deck is realized through the large penetration of the ship position submerged arc welding; the U-shaped rib plate units are welded in the same direction, so that the distortion of the U-shaped rib plate units is avoided. As shown in fig. 6, a bead arrangement of the U-shaped rib after the inner welding and the outer welding is shown.
Secondly, the welding current and the welding gun angle are controlled in an important way, after the hydraulic clamping and fixing system is used for clamping and fixing the bridge deck, the outer sides of the U-shaped ribs are welded synchronously and symmetrically according to the designed outer welding parameters in the same direction, and the included angle between the outer welding gun and the bridge deck is a preset value, for example, the included angle between the outer welding gun and the bridge deck is 45 degrees.
In one embodiment, the step of mechanically correcting the deck slab includes: and applying external mechanical force to the bridge deck plates at two sides of the U-shaped rib by using correction equipment according to correction parameters so as to enable the U-shaped rib and the bridge deck plates to generate plastic deformation opposite to the welding deformation direction, thereby eliminating the welding deformation.
Specifically, after the welding of the outer side of the U-shaped rib is finished, the U-shaped rib is naturally cooled on a hydraulic clamping system platform, and when the temperature is reduced to below 60 ℃, the clamp of the clamping system can be loosened, and the pre-deformation amount can counteract the welding residual deformation at the moment, and the welding beads on the inner side and the outer side of the U-shaped rib are shown in figure 7.
And then external mechanical force is applied to the steel bridge deck plate of the special U-shaped rib cold straightening device, so that the U-shaped rib steel bridge deck plate generates plastic deformation in the opposite direction to the welding deformation, and the welding deformation is eliminated.
As shown in fig. 8, when 5U-shaped ribs are arranged, rolling two U-shaped ribs No. 2 and No. 4 at intervals for 1 time respectively; and then the upper pinch roller moving body and the lower driving roller moving body are laterally shifted to align the No. 1 and the No. 3 pinch roller moving bodies, and the reciprocating motion is repeated for 1 time and … …, so that the transverse deformation of the U rib plate units can be basically eliminated.
In one embodiment, the correction parameter is derived from the spacing and thickness of the U-shaped ribs, the thickness of the bridge deck.
Specifically, on the mechanical rolling straightening machine for the U-shaped rib plate units, the relative positions of the pressurizing straightening rollers are automatically adjusted according to the distance and the thickness of the U-shaped rib plates of the plate units, and corresponding straightening process parameters are called according to the thickness of the plate units to carry out cold pressing straightening. The correction time interval is symmetrical to correct, the correction is carried out by the principle of rolling to release stress, the accuracy is high, the speed is high, and no damage is caused to the U-shaped rib plate units.
In one embodiment, the step of locally correcting the U-shaped rib and the bridge deck comprises: baking the deformation parts of the bridge deck plate and the U-shaped rib by using a partial flame method; and after baking, preserving heat for a preset period of time for the U-shaped rib and the bridge deck, and naturally cooling to room temperature.
Specifically, after mechanical correction is completed, the transverse deformation of the U-shaped rib plate units is basically eliminated, and the requirement of manufacturing standard flatness can be met. If the bridge deck is deformed locally, local flame correction can be adopted, and the bridge deck is deformed longitudinally, so that the flame is used for carrying out linear heating on the U-shaped rib, and the heating temperature and the heating width are controlled to achieve trimming of the U-shaped rib bridge deck unit.
In addition, the baking is observed in real time according to experience, and the temperature is kept for a certain period of time, for example, 5min after the baking is finished, and then the temperature is naturally cooled to room temperature.
According to the method for controlling the full penetration welding deformation of the U-shaped rib and the bridge deck, on one hand, the purpose of controlling the welding deformation of the U-shaped rib and the bridge deck is achieved by setting the inner welding parameter and the outer welding parameter and setting the anti-deformation measure and performing mechanical correction. On the other hand, starting from each link of welding the U-shaped rib and the bridge deck plate, the welding deformation of the U-shaped rib and the bridge deck plate can be effectively controlled. The method has strong practicability and provides a better solution for controlling welding deformation of the U-shaped rib bridge deck unit weld joint.
It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the above description are directional or positional relationships as indicated based on the drawings, merely to facilitate description of the embodiments of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the embodiments of the present disclosure.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the presently disclosed embodiments, the terms "mounted," "connected," "secured," and the like are to be construed broadly, as well as being either fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
In the presently disclosed embodiments, unless expressly stated and limited otherwise, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A method of controlling full penetration weld distortion of a U-shaped rib and a bridge deck, the method comprising:
setting an inner welding parameter and an outer welding parameter;
positioning a plurality of U-shaped ribs on a bridge deck plate, and assembling the U-shaped ribs into an orthotropic steel bridge deck plate, wherein a gap between the U-shaped ribs and the bridge deck plate is not more than 1mm;
synchronous welding is carried out on the inner side of the U-shaped rib according to the internal welding parameters;
the bridge deck is fixed by utilizing a hydraulic clamping system, and preset reverse deformation is carried out on the bridge deck;
step-by-step welding is carried out on the outer sides of the U-shaped ribs according to the external welding parameters;
after the post-welding temperature of the U-shaped rib and the bridge deck plate is cooled to a first preset value, loosening the hydraulic clamping system;
and respectively carrying out mechanical correction on the bridge deck plate, and carrying out local flame correction on the U-shaped rib and the bridge deck plate until finishing welding deformation finishing.
2. The method of controlling full penetration weld distortion of a U-shaped rib to deck slab of claim 1, wherein the fillet weld welding parameters include:
the internal welding material is SU35 (phi 1.6) +SJ101q, the internal welding current is 390-410A, the internal welding voltage is 24-32V, and the internal welding speed is 460-500 mm/min.
3. The method of controlling full penetration weld distortion of a U-shaped rib to a bridge deck of claim 1, wherein the external weld welding parameters include:
the external welding material is SU35 (phi 3.2) +SJ101q, the external welding current is 620-640A, the external welding voltage is 28-32V, and the external welding speed is 460-500 mm/min.
4. The method of controlling full penetration weld distortion of a U-shaped rib to a deck slab of claim 1, wherein the step of positioning a plurality of U-shaped ribs on the deck slab to assemble an orthotropic steel deck slab comprises:
and positioning and assembling the plurality of U-shaped ribs and the bridge deck plate through an assembling jig frame to assemble the orthotropic steel bridge deck plate.
5. The method of controlling full penetration weld distortion of a U-shaped rib and bridge deck according to claim 1, wherein said step of synchronously welding the inside of said U-shaped rib according to said inner weld parameters comprises:
carrying out level synchronization, homodromous and symmetrical welding on welding seams on the inner sides of the U-shaped ribs by adopting filament submerged arc welding; wherein, the included angle between the welding gun of the internal welding and the bridge deck is 30-60 degrees.
6. The method of controlling full penetration weld distortion of a U-shaped rib to a bridge deck according to claim 1, wherein the step of step welding the outside of the U-shaped rib according to the external weld parameters comprises:
placing the bridge deck on a ship position overturning jig frame;
after the ship position overturning jig frame is overturned for a second preset value, welding the outer side of one side of the U-shaped rib;
and after the ship position overturning jig frame is overturned by a third preset value, welding the outer side of the other side of the U-shaped rib.
7. The method of controlling full penetration weld distortion of a U-shaped rib to a deck slab of claim 1, wherein the step of mechanically correcting the deck slab comprises:
and applying external mechanical force to the bridge deck plates at two sides of the U-shaped rib by using correction equipment according to correction parameters so as to enable the U-shaped rib and the bridge deck plates to generate plastic deformation opposite to the welding deformation direction, thereby eliminating the welding deformation.
8. The method of controlling full penetration weld distortion of a U-shaped rib to a deck slab of claim 7, wherein the corrective parameter is derived from the spacing and thickness of the U-shaped rib, the thickness of the deck slab.
9. The method of controlling full penetration weld distortion of a U-shaped rib and deck slab of claim 1, wherein the step of locally correcting the U-shaped rib and deck slab comprises:
baking the deformation parts of the bridge deck plate and the U-shaped rib by using a partial flame method;
and after baking, preserving heat for a preset period of time for the U-shaped rib and the bridge deck, and naturally cooling to room temperature.
10. The method of controlling full penetration weld distortion of a U-shaped rib to a deck slab of claim 1, wherein the deck slab arches at an angle of 2 ° to 5 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310024902.8A CN116213980A (en) | 2023-01-09 | 2023-01-09 | Method for controlling full penetration welding deformation of U-shaped rib and bridge deck |
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| CN202310024902.8A CN116213980A (en) | 2023-01-09 | 2023-01-09 | Method for controlling full penetration welding deformation of U-shaped rib and bridge deck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117464134A (en) * | 2023-12-26 | 2024-01-30 | 中铁四局集团有限公司 | Streamline flat steel box girder welding equipment and processing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117464134A (en) * | 2023-12-26 | 2024-01-30 | 中铁四局集团有限公司 | Streamline flat steel box girder welding equipment and processing method thereof |
| CN117464134B (en) * | 2023-12-26 | 2024-05-24 | 中铁四局集团有限公司 | Streamline flat steel box girder welding equipment and processing method thereof |
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Application publication date: 20230606 |