CN104275560A - Steel girder welding method - Google Patents
Steel girder welding method Download PDFInfo
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- CN104275560A CN104275560A CN201410597588.3A CN201410597588A CN104275560A CN 104275560 A CN104275560 A CN 104275560A CN 201410597588 A CN201410597588 A CN 201410597588A CN 104275560 A CN104275560 A CN 104275560A
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- sections
- girder steel
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- welded
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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
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/28—Beams
Abstract
The invention discloses a steel girder welding method. The welding method comprises the steps of fixing a first section and a second section of a steel girder to be welded with a locating mold plate, and welding an annular welding seam to be welded between the first section and the second section of the steel girder, wherein a strain gauge is arranged on the locating mold plate and belongs to a stress monitoring device, the stress monitoring device is used for acquiring the current stress change value of the position of the locating mold plate by the strain gauge and outputting the current stress change value; the current stress change value is monitored in real time in a welding process of the annular welding seam to be welded between the first section and the second section of the steel girder, and when the current stress change value is more than the preset value, the current welding position is adjusted to enable the current stress change value to be less than the preset value, so that the line shape of the third section of the steel girder, formed by welding, is a preset line shape.
Description
Technical field
The present invention relates to steel bridge's manufacture technical field, particularly relate to a kind of welding method of girder steel.
Background technology
Steel bridge's manufacture is just toward maximization, batch production future development, and the beam section size manufactured in factory is more and more large, to reduce the workload at bridge site scene.Such as: port Zhuhai and Macao bridge CB02 bid section, except Channel Bridge steel box-girder, all adopts large sections on-site hoisting, is divided into the large sections of steel box-girder and the large sections of cable wire tower, the alignment control that large sections manufactures is most important, and what directly have influence on girder steel and head tower becomes bridge linear.Large sections is spliced into by the little sections of beam section, the master operation related to is the welding of the intersegmental circular seam joint of trifle, therefore after little sections is accurately located on locating template, the welding deformation of effective control circular seam joint is exactly ensure that large sections manufactures linear key, if weld industry is improper, to the side sway of large sections, torsional deflection and vertically linear deviation be caused, thus affect workmanship and serviceability.
The welding deformation controlling method of current routine is generally: rigidly fix each sections of girder steel, and welding scheme is selected in qualitative analysis.In welding process, by the effect of extraneous (locating template produces) constraint, appearance and size variable quantity is less, be difficult to carry out measurement to its welding deformation trend judge, also cannot adjust welding scheme in time, larger internal stress is there is in each sections of girder steel after welding, the each sections of girder steel is after the complete releasing external constraint of welding (that is: being separated with the steel girder segment welded by locating template), the each little sections release internal stress of girder steel, thus create welding deformation, cause the linear deviation of large sections.It is not high to there is control accuracy in conventional method, is too dependent on the deficiencies such as operator's experience.
In sum, at present when carrying out welding to the little sections of girder steel and obtaining the large sections of girder steel, exist and be difficult to control the linear of the large sections of girder steel, cause the technical problem that the linear deviation of the large sections of girder steel is larger.
Summary of the invention
The embodiment of the present application is by providing a kind of welding method of girder steel, to solve in prior art when carrying out welding to the little sections of girder steel and obtaining the large sections of girder steel, exist and be difficult to control the linear of the large sections of girder steel, cause the technical problem that the linear deviation of the large sections of girder steel is larger.
The application provides following technical scheme by an embodiment of the application:
A welding method for girder steel, comprising:
Girder steel first sections to be welded and girder steel second sections are fixed with locating template respectively, wherein, described locating template is provided with foil gauge, described foil gauge belongs to monitor for stress, described monitor for stress is used for the current stress value changing value being gathered described locating template place by described foil gauge, and exports described current stress value changing value;
Circular weld to be welded between described girder steel first sections and described girder steel second sections is welded, wherein, carrying out in welding process to the circular weld to be welded between described girder steel first sections and described girder steel second sections, current stress value changing value described in Real-Time Monitoring, and when described current stress value changing value is greater than preset value, adjust current welding position, to make described current stress value change be less than described preset value, thus the girder steel that welding is obtained the 3rd sections is linear linear for presetting.
Preferably, described foil gauge, is specially:
Vertical foil gauge, is arranged on vertical locating template, for when welding the side seam in described circular weld to be welded, gathers described girder steel first sections and/or the current STRESS VARIATION value of described girder steel second sections on vertically.
Preferably, described circular weld to be welded between described girder steel first sections and described girder steel second sections to be welded, comprising:
The first side seam in described circular weld is welded;
Monitor described vertical on current STRESS VARIATION value, and described vertical on current STRESS VARIATION value be greater than the first preset value time, stop welding described first side seam;
Weld the second side seam in described circular weld, wherein, described first side seam and described second side seam lay respectively at the both sides up and down of described circular weld.
Preferably, described foil gauge, is specially:
Transverse strain sheet, is arranged in located lateral template, for when welding the vertical weld seam in described circular weld to be welded, gathers described girder steel first sections and/or described second little sections girder steel current STRESS VARIATION value in the horizontal.
Preferably, described circular weld to be welded between described girder steel first sections and described girder steel second sections to be welded, comprising:
The vertical weld seam of in described circular weld first is welded;
Current STRESS VARIATION value transversely described in monitoring, and when current STRESS VARIATION value is in the cross direction greater than the second preset value, stop welding the described first vertical weld seam;
Weld the vertical weld seam of second in described circular weld, wherein, the described first vertical weld seam and the described second vertical weld seam lay respectively at the left and right sides of described circular weld.
Preferably, described circular weld to be welded between described girder steel first sections and described girder steel second sections is welded after, also comprise:
Described girder steel the 3rd sections that welding obtains is separated with described locating template.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
In the embodiment of the present application, disclose a kind of welding method of girder steel, comprise: girder steel first sections to be welded and girder steel second sections are fixed with locating template respectively, wherein, described locating template is provided with foil gauge, described foil gauge belongs to monitor for stress, and described monitor for stress is used for the current stress value being gathered described locating template place by described foil gauge, and exports described current stress value; Circular weld to be welded between described girder steel first sections and described girder steel second sections is welded, wherein, carrying out in welding process to the circular weld to be welded between described girder steel first sections and described girder steel second sections, current STRESS VARIATION value described in Real-Time Monitoring, and when described current stress value is greater than preset value, adjust current welding position, to make described current STRESS VARIATION value be less than described preset value, thus the girder steel that welding is obtained the 3rd sections is linear linear for presetting.Wherein, described girder steel first sections and girder steel second sections are the little sections of girder steel, and described girder steel the 3rd sections is the large sections of girder steel.
Due to, in assembled welding process, adopt stress monitoring to replace the appearance and size monitoring of each sections of girder steel, Real-Time Monitoring welding deformation trend, thus welding scheme is adjusted targetedly in time in welding process, reduce each sections internal stress of girder steel, farthest reduce welding deformation, thus to efficiently solve in prior art when carrying out welding to the little sections of girder steel and obtaining the large sections of girder steel, exist and be difficult to control the linear of the large sections of girder steel, cause the technical problem that the linear deviation of the large sections of girder steel is larger, achieve and linear accurate control is manufactured to the large sections of girder steel, thus significantly improve the technique effect of the large section assembling welding quality of girder steel.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of the welding method of girder steel in the embodiment of the present application;
Fig. 2, Fig. 3 are the schematic diagram of girder steel first sections in the embodiment of the present application (that is: the little sections of girder steel) and girder steel second sections (that is: the little sections of girder steel);
Loading schematic diagram when Fig. 4 is girder steel the 3rd sections (that is: the large sections of girder steel) assembled welding in the embodiment of the present application.
Detailed description of the invention
The embodiment of the present application is by providing a kind of welding method of girder steel, to solve in prior art when carrying out welding to the little sections of girder steel and obtaining the large sections of girder steel, exist and be difficult to control the linear of the large sections of girder steel, cause the technical problem that the linear deviation of the large sections of girder steel is larger.
The technical scheme of the embodiment of the present application is for solving the problems of the technologies described above, and general thought is as follows:
A kind of welding method of girder steel, comprise: girder steel first sections to be welded and girder steel second sections are fixed with locating template respectively, wherein, described locating template is provided with foil gauge, described foil gauge belongs to monitor for stress, described monitor for stress is used for the current STRESS VARIATION value being gathered described locating template place by described foil gauge, and exports described current STRESS VARIATION value; Circular weld to be welded between described girder steel first sections and described girder steel second sections is welded, wherein, carrying out in welding process to the circular weld to be welded between described girder steel first sections and described girder steel second sections, current STRESS VARIATION value described in Real-Time Monitoring, and when described current stress value is greater than preset value, adjust current welding position, to make described current STRESS VARIATION value be less than described preset value, thus the girder steel that welding is obtained the 3rd sections is linear linear for presetting.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail.
First illustrate, the term "and/or" occurred herein, being only a kind of incidence relation describing affiliated partner, can there are three kinds of relations in expression, and such as, A and/or B, can represent: individualism A, exists A and B simultaneously, these three kinds of situations of individualism B.In addition, character "/" herein, general expression forward-backward correlation is to the relation liking a kind of "or".
Embodiment one
As shown in Figure 1, present embodiments provide a kind of welding method of girder steel, comprising:
Step S101: girder steel first sections to be welded and girder steel second sections are fixed with locating template respectively, wherein, described locating template is provided with foil gauge, described foil gauge belongs to monitor for stress, described monitor for stress is used for the current STRESS VARIATION value being gathered described locating template place by described foil gauge, and exports described current STRESS VARIATION value.
In specific implementation process, described girder steel first sections and girder steel second sections are the little sections of girder steel, described girder steel the 3rd sections is the large sections of girder steel, and described first sections and girder steel second sections are the little sections of two joint girder steels of the arbitrary neighborhood in the little sections of whole girder steels required when the large sections of the described girder steel of assembled welding.
In specific implementation process, described monitor for stress, comprising:
Multiple foil gauge, be separately positioned on polylith locating template, for carrying out in welding process to described girder steel first sections and girder steel second sections, gather the current stress value at multiple position on girder steel first sections and/or girder steel second sections, wherein, these stress values can reflect the concrete STRESS VARIATION between described girder steel first sections and girder steel second sections, thus determine the linear variation tendency of welding girder steel the 3rd sections obtained;
Display unit, can show the current STRESS VARIATION value at described multiple position in real time;
Alarm unit, when the current STRESS VARIATION value of certain of described multiple position is greater than preset value, can send alarm signal.
In specific implementation process, as shown in Figure 2 and Figure 3, fix some pieces of locating templates in the bottom often saving the little sections of girder steel, locating template plays the effect rigidly fixed, foil gauge is arranged on to be treated on the side locating template of girth welding, and every block location locating template is provided with a foil gauge.
In specific implementation process, described foil gauge, comprising:
Vertical foil gauge, be arranged on the locating template that is placed in bottom described first sections and/or girder steel second sections, be arranged on vertical locating template, for when welding the side seam in described circular weld to be welded, gather described girder steel first sections and/or the current STRESS VARIATION value of described girder steel second sections on vertically; And/or
Transverse strain sheet, be arranged on be placed in described first sections and/or girder steel second sections both sides locating template on, be arranged in located lateral template, for when welding the vertical weld seam in described circular weld to be welded, gather described girder steel first sections and/or described second little sections girder steel current STRESS VARIATION value in the horizontal.
In specific implementation process, after girder steel first sections to be welded and girder steel second sections and locating template consolidation, before formal welding, need foil gauge initial value to reset, and alarm unit is set, when current STRESS VARIATION value is greater than described preset value, and alarm.
Step S102: the circular weld to be welded between described girder steel first sections and described girder steel second sections is welded, wherein, carrying out in welding process to the circular weld to be welded between described girder steel first sections and described girder steel second sections, current STRESS VARIATION value described in Real-Time Monitoring, and when described current stress value is greater than preset value, adjust current welding position, to make described current stress value be less than described default stress value, thus the girder steel that welding is obtained the 3rd sections is linear linear for presetting.
For example, described circular weld comprises successively: the second side seam being positioned at the first side seam of upside, being positioned at the first vertical weld seam in left side, being positioned at downside, be positioned at the second vertical weld seam on right side, and these four weld seams is end to end.
For example, in the first possible embodiment of step S102, for the stress monitoring on vertical, comprising: the first side seam being positioned at upside in described circular weld is welded; Monitor described vertical on current STRESS VARIATION value, and described vertical on current STRESS VARIATION value be greater than the first preset value time (or when receiving warning message that alarm unit exports), circular weld upper and lower sides welding unbalanced contraction is described, create downward flexural deformation trend, utilize the principle of " first weldering place is first out of shape " in each sections welding process of girder steel, should stop welding described first side seam, and to be positioned in described circular weld downside the second side seam weld.Further, welding process is being carried out to the second side seam being arranged in downside, if monitor described vertical on current STRESS VARIATION value when being greater than the first preset value (or when receiving warning message that alarm unit exports), circular weld upper and lower sides welding unbalanced contraction is described, create flexural deformation trend upwards, utilize the principle of " first weldering place is first out of shape " in each sections welding process of girder steel, then should stop welding described second side seam, turn to and welding is proceeded to the first side seam being positioned at upside; And so forth, until complete the welding to described first side seam and described second side seam.
For example, in the embodiment that the second of step S102 is possible, for lateral stress monitoring, comprising: the first vertical weld seam being positioned at left side in described circular weld is welded; Current STRESS VARIATION value transversely described in monitoring, and current STRESS VARIATION value in the cross direction when being greater than the second preset value (or when receiving warning message that alarm unit exports), circular weld left and right sides welding unbalanced contraction is described, create flexural deformation trend to the right, utilize the principle of " first weldering place is first out of shape " in each sections welding process of girder steel, should stop welding the described first vertical weld seam, and the second vertical weld seam being positioned at right side in described circular weld is welded.Further, carrying out in welding process to the second vertical weld seam, if when current STRESS VARIATION value described in monitoring transversely is greater than the second preset value (or when receiving warning message that alarm unit exports), circular weld left and right sides welding unbalanced contraction is described, create flexural deformation trend left, then stop welding the described second vertical weld seam, turn to and welding is proceeded to the first vertical weld seam being positioned at left side; And so forth, until complete the welding to the described first vertical weld seam and the described second vertical weld seam.
Further, as shown in Figure 4, P is total stress value on the locating template of welding process side, and l is the distance between a point template, and a is the distance in little sections between longitudinal direction locating template, as shown in Figure 2,3.If the maximum that the resilience displacement after two adjacent segment solution removing template constraints allows is f
max, described default stress value (comprise first and preset stress value or the second default stress value) can be determined based on following equation (1):
Wherein, E is elastic modelling quantity, and I is the equatorial moment of inertia in cross section, P=nS ε (n is the total template number by weld seam end, and S is the cross section of each template, and ε is described default stress value).
Step S103: described girder steel the 3rd sections that welding obtains is separated with described locating template.
In specific implementation process, if the docking vertical stress sheet of circumferential weld both sides and the designation data of lateral stress sheet are enough hour, after so separating removing template constraint, each sections of girder steel can not produce obvious welding deformation, thus reach the alignment control object of large section assembling welding.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
Due to, in assembled welding process, adopt stress monitoring to replace the appearance and size monitoring of each sections of girder steel, Real-Time Monitoring welding deformation trend, thus welding scheme is adjusted targetedly in time in welding process, reduce each sections internal stress of girder steel, farthest reduce welding deformation, thus efficiently solve in prior art little sections girder steel is carried out welding obtain large sections girder steel time, exist and be difficult to control the linear of large sections girder steel, cause the technical problem that the linear deviation of large sections girder steel is larger, achieve and linear accurate control is made to large sections girder steel, thus significantly improve the technique effect of the large section assembling welding quality of girder steel.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. a welding method for girder steel, is characterized in that, comprising:
Girder steel first sections to be welded and girder steel second sections are fixed with locating template respectively, wherein, described locating template is provided with foil gauge, described foil gauge belongs to monitor for stress, described monitor for stress is used for the current STRESS VARIATION value being gathered described locating template place by described foil gauge, and exports described current STRESS VARIATION value;
Circular weld to be welded between described girder steel first sections and described girder steel second sections is welded, wherein, carrying out in welding process to the circular weld to be welded between described girder steel first sections and described girder steel second sections, current STRESS VARIATION value described in Real-Time Monitoring, and when described current STRESS VARIATION value is greater than preset value, adjust current welding position, to make described current STRESS VARIATION value be less than described preset value, thus the girder steel that welding is obtained the 3rd sections is linear linear for presetting.
2. the method for claim 1, is characterized in that, described foil gauge, is specially:
Vertical foil gauge, is arranged on vertical locating template, for when welding the side seam in described circular weld to be welded, gathers described girder steel first sections and/or the current STRESS VARIATION value of described girder steel second sections on vertically.
3. method as claimed in claim 2, is characterized in that, describedly welds the circular weld to be welded between described girder steel first sections and described girder steel second sections, comprising:
The first side seam in described circular weld is welded;
Monitor described vertical on current STRESS VARIATION value, and described vertical on current STRESS VARIATION value be greater than the first preset value time, stop welding described first side seam;
Weld the second side seam in described circular weld, wherein, described first side seam and described second side seam lay respectively at the both sides up and down of described circular weld.
4. the method for claim 1, is characterized in that, described foil gauge, is specially:
Transverse strain sheet, is arranged in located lateral template, for when welding the vertical weld seam in described circular weld to be welded, gathers described girder steel first sections and/or described second little sections girder steel current STRESS VARIATION value in the horizontal.
5. method as claimed in claim 4, is characterized in that, describedly welds the circular weld to be welded between described girder steel first sections and described girder steel second sections, comprising:
The vertical weld seam of in described circular weld first is welded;
Current STRESS VARIATION value transversely described in monitoring, and when current STRESS VARIATION value is in the cross direction greater than the second preset value, stop welding the described first vertical weld seam;
Weld the vertical weld seam of second in described circular weld, wherein, the described first vertical weld seam and the described second vertical weld seam lay respectively at the left and right sides of described circular weld.
6. the method for claim 1, is characterized in that, described circular weld to be welded between described girder steel first sections and described girder steel second sections is welded after, also comprise:
Described girder steel the 3rd sections that welding obtains is separated with described locating template.
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| CN201410597588.3A CN104275560B (en) | 2014-10-29 | 2014-10-29 | A kind of welding method of girder steel |
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| CN201410597588.3A CN104275560B (en) | 2014-10-29 | 2014-10-29 | A kind of welding method of girder steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115030173A (en) * | 2022-05-25 | 2022-09-09 | 歌山建设集团有限公司 | Deep foundation pit construction method based on Bailey truss steel trestle |
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| JP2010131629A (en) * | 2008-12-04 | 2010-06-17 | Toshiba Corp | Apparatus and method of monitoring deformation of weld structure |
| CN103551712A (en) * | 2013-10-29 | 2014-02-05 | 中国电子科技集团公司第三十八研究所 | Method for predicting welding deformation of large radar structural part |
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| JP3015877B2 (en) * | 1998-07-21 | 2000-03-06 | 科学技術庁金属材料技術研究所長 | Dynamic strain measurement method for welds |
| JP2001264026A (en) * | 2000-03-21 | 2001-09-26 | National Institute For Materials Science | Measuring method of dynamic strain under influence of welding arc light, and measuring instrument |
| JP2010131629A (en) * | 2008-12-04 | 2010-06-17 | Toshiba Corp | Apparatus and method of monitoring deformation of weld structure |
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