CN105921862B - A kind of soldering method suitable for steel pipe and steel pipe oblique combination forming - Google Patents
A kind of soldering method suitable for steel pipe and steel pipe oblique combination forming Download PDFInfo
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- CN105921862B CN105921862B CN201610482877.8A CN201610482877A CN105921862B CN 105921862 B CN105921862 B CN 105921862B CN 201610482877 A CN201610482877 A CN 201610482877A CN 105921862 B CN105921862 B CN 105921862B
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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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/032—Seam welding; Backing means; Inserts for three-dimensional seams
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A kind of soldering method suitable for steel pipe and steel pipe oblique combination forming, the bevelled mode in part is used to the connector of oblique steel pipe, it avoids leading to the problem of welding difficulty is big, and welding quality cannot be guaranteed because of whole circle groove welding, improve work efficiency and welding quality.
Description
Technical field
The present invention relates to a kind of steel-pipe welding method, especially a kind of welderings suitable for steel pipe and steel pipe oblique combination forming
Connect processing method.
Background technology
Grid structure is the space structure connected according to certain grid configuration by node by plurality of rods part to be formed, is belonged to
In space pin-bar assembly, repeatedly overstable space structure, high, good, good appearance from heavy and light, stability with industrialization degree
Feature.The rod piece of grid structure can participate in work and have good stress performance, and rigidity and stability are flat better than general
Face structure can effectively bear various non-symmetrical loads, concentrfated load, dynamic loading.All rod piece entirety mechanical characteristics of grid structure
Make its space stiffness big, thus anti-seismic performance is good.
Grid structure shortcoming is that the rod piece quantity intersected on node is more, and fabrication and installation are compared with planar structure complexity.It forms
The basic unit of rack includes pyrometric cone, triangular prism, square, butt quadrangular pyramid etc., is combined into putting down by these basic units
Face, therefore large-size net rack steel construction generally requires to resolve into delivery unit, then carry out at project scene after the completion of factory manufactures
Integral space truss structure is welded into after spelling.It there is the weld seam that steel pipe is formed with steel pipe, steel pipe and ball Orthogonal Composite at the scene, this
The welding at a kind of composite welds scene is not difficult, and groove is relatively all very regular after factory's spelling, is easily ensured in welding.But
It is the composite welds for steel pipe and steel pipe oblique, this kind of weld seam belongs to aerial all position welding, and entire groove face every bit
The bevel angle size of position is all different, and not only retaining wall on slope gets up extremely difficult, but also because the variation of angle makes during welding
Its welding quality is also not easy to ensure.
Traditional handicraft is all using whole circle bevel, is penetrated to ensure, the welding rod or welding wire of manual welding operation will can be stretched
On earth, steel pipe and steel pipe intersection gap are very big when causing the groove to open processed, are often that lack of penetration concentrate of incomplete fusion occurs at this
Place.In addition, it is also not easy to carry out qualitative examination to weld seam internal soundness at this.In this way so that becoming at steel pipe inclined T joint
Weak spot in one quality control of entire grid structure, easily there are security risks by poor quality, cause safety accident.
Invention content
The technical problems to be solved by the invention are to provide a kind of welding suitable for steel pipe and steel pipe oblique combination forming
Processing method can reduce the welding difficulty of manual welding oblique steel pipe, ensure through welding, improve welding quality.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of soldering method suitable for steel pipe and steel pipe oblique combination forming includes the following steps：
Step 1：Whole lap welding is stitched into subregion, including top area θ 1, lateral region θ 2 and root area θ 3, top region
1 value ranges of domain θ be 115 degree -125 degree, symmetrical both sides 2 value ranges of lateral region θ be 75 degree -85 degree, root area θ 3
Value range is 75 degree of -85 degree；The groove of top area θ 1 and lateral region θ 2 are determined according to the angle α between oblique pipe simultaneously
Angle, 3 square grooves of root area θ.
Step 2：According to the bevel angle in each region, groove has been issued to steel pipe, and local repair is carried out to groove and is cut.
Step 3：The steel pipe cut to needs carries out holding out against assembling, and the symmetrical multiple spot welding that carries out realizes positioning, for formal welding
It prepares.
Step 4：Realize welding, welding sequence is：1), back welding：It is symmetrical in top area θ 1 and root area θ 3 successively
One of back welding of bottoming, 2 symmetrical one of back welding of bottoming of lateral region θ in both sides, completes whole circle back welding；2), using point
Section welding method, multi-pass welding：First, the weld seam of monosymmetric lateral region θ 2 is completed in welding；Secondly, according to installation position
The fillet weld in the flat position of top area θ 1 or root area θ 3 are completed, throat thickness reaches half；Then, it completes opposite with fillet weld in the flat position
Face upward horizontal position welding seam in region；Finally, the welding of the other half fillet weld in the flat position of top area θ 1 or root area θ 3 is completed；3), capping
Weldering：It is whole to carry out one of weld cap.
Step 5：Flaw detection is carried out to weld seam.
The angle α takes 30 degree of -60 degree.
When α=60 degree, the bevel angle variation of θ 1 is 40 degree of-60-40 degree of degree；2 bevel angles of θ take 40 degree -30.
：When α=45 degree, the bevel angle variation of θ 1 is 45 degree of -55 degree -45；2 bevel angles of θ take 45 degree of -35 degree.
When α=30 degree, the bevel angle variation of θ 1 is 40 degree of-50-40 degree of degree；2 bevel angles of θ take 40 degree of -30 degree.
The bevel angle of the top area θ 1 and lateral region θ 2 can go up 3 degree of lower deviation.
A kind of soldering method suitable for steel pipe and steel pipe oblique combination forming of the present invention has following technology effect
Fruit：
1), since weld is the weld seam of stress, it is therefore necessary to penetrate and do the defect detecting test of internal soundness.Using routine
Whole lap welding connect, the gap that generates is very big when acute angle commissure is due to welding, is on the one hand not easy to penetrate, and on the other hand increases
Welding residual stress is divided into groove area and non-groove area by whole lap welding seam, the groove welding technology of existing maturation is pressed in groove area
Through welding can be realized, can ensure in weld seam internal soundness and intensity rather than groove area in the form of fillet weld come etc.
Strong design, can equally solve the problems, such as weld strength, so as to which whole circle welding strength of welding seam be made to be protected, and conveniently do internal matter
The defect detecting test of amount.
2), since the bevel angle of oblique pipeline is variation, the size of every groove is all variation, by by slope
Mouth region is divided into top area θ 1 and monosymmetric lateral region θ 2, and groove area is made to account about the 7/9 of whole weld seam, realizes slope
The symmetrical segmentation welding of mouth, under the premise of ensureing to penetrate, reduces the loading of weld seam, and then eliminates live excessive welding
Residual stress improves the service life of grid structure.In addition non-groove region in the form of fillet weld come equal strength design, nothing
Groove welding must be carried out to steel pipe intersection, and then reduces welding procedure difficulty.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the schematic diagram (the first) after oblique penstock installation.
Fig. 2 is the schematic diagram (second) after oblique penstock installation.
Fig. 3 is the schematic diagram (the third) after oblique penstock installation.
Fig. 4 is oblique steel pipe seam region division schematic diagram.
Fig. 5 is the schematic diagram (the first) after oblique steel-pipe welding.
Fig. 6 is the schematic diagram (second) after oblique steel-pipe welding.
Fig. 7 is the schematic diagram (the third) after oblique steel-pipe welding.
Specific embodiment
A kind of soldering method suitable for steel pipe and steel pipe oblique combination forming includes the following steps：
Step 1：Whole lap welding is stitched into subregion, including top area θ 1, lateral region θ 2 and root area θ 3, top region
1 value ranges of domain θ be 115 degree -125 degree, symmetrical both sides 2 value ranges of lateral region θ be 75 degree -85 degree, root area θ 3
Value range is 75 degree of -85 degree；The groove of top area θ 1 and lateral region θ 2 are determined according to the angle α between oblique pipe simultaneously
Angle, 3 square grooves of root area θ.After assembling at the scene, θ2+θ1+θ2Region is groove weld region, accounts about weld seam perimeter
7/9, θ3Region is corner welding line region, and Size of welds K takes the maximum value of intersecting thickness of steel pipe.It is taken over for oblique steel pipe welding
The problem of Cheng Zhong, intersecting acute angle weld welded gaps are big, incomplete fusion is lack of penetration, weld seam internal soundness detection difficult, pass through
Groove area and non-groove area (root, acute angle welding region) are set, groove welding is realized in groove area, can not only ensure weld seam matter
Amount, the internal soundness inspection that steel pipe does weld seam in the range of groove area are also entirely capable of realizing.Rather than groove area inside weld use etc. is strong
High weld seam replaces penetration weld intensity, from theoretical calculation carries out the guarantee of intensity, welds and operates from welding process angle
Property is strong, advantageously ensures that welding quality.
Step 2：According to the bevel angle in each region, groove has been issued to steel pipe, and local repair is carried out to groove and is cut.
The mowing of part may be used angle grinder and repair cutting.
Step 3：The steel pipe cut to needs carries out holding out against assembling, and the position of oblique coupling assembled generally has
Three kinds, as shown in Figure of description 1-3, multiple spot welding realization positioning is carried out at coupling, is prepared for formal welding.
Step 4：Realize welding, the welding manner completion of generally use welding electrode arc welding or CO2 gas shielded arc weldings.Weldering
Connecing sequence is：1), back welding：The back welding together with top area θ 1 and the symmetrical bottoming in corner welding line region successively, in both sides
2 symmetrical one of back welding of bottoming of lateral region θ, completes whole circle back welding；2), using segmentation welding method, multi-pass welding：It is first
First, the weld seam of monosymmetric lateral region θ 2 is completed in welding；Secondly, top area θ 1 or root area are completed according to installation position
The fillet weld in the flat position of domain θ 3, throat thickness reach half；Then, the horizontal position welding of facing upward with fillet weld in the flat position opposed area is completed to stitch；It is last complete
Into the welding of top area θ 1 or the other half fillet weld in the flat position of root area θ 3；3), cosmetic welding：It is whole to carry out one of weld seam lid
Face.
Step 5：Flaw detection is carried out to weld seam.
The angle α takes 30 degree-60 when spending, and the bevel angle of corresponding top area θ 1 takes 40 degree of-60-40 degree of degree, side
θ 2 bevel angles in portion region take 40 degree of -30 degree.At this angle, it can ensure that the quality of steel pipe groove welding welding is best.
The bevel angle of the top area θ 1 and lateral region θ 2 can go up 3 degree of lower deviation.Due to the groove of oblique light pipe
Angle is variation, and to ensure welding quality, the angular deviation of groove cannot be too big, otherwise can influence weld seam internal soundness qualification
Rate.
Preferred embodiment 1
α angles are determined by the design of entire grid structure, but general α takes 30 degree~60 degree this ranges.
When α=60 degree, the bevel angle variation of θ 1 is 40 degree of-60-40 degree of degree；2 bevel angles of θ take 40 degree -30；
When α=45 degree, the bevel angle variation of θ 1 is 45 degree of -55 degree -45；2 bevel angles of θ take 45 degree of -35 degree；
When α=30 degree, the bevel angle variation of θ 1 is 40 degree of-50-40 degree of degree；2 bevel angles of θ take 40 degree of -30 degree.
For different α angles, the angle in different groove regions is changed, to make the weld seam between oblique steel pipe
Loading through welding is realized while reduce to the greatest extent, ensure the optimization of welding, reduce to greatest extent residual in welding process
Residue stress.
Preferred embodiment 2
In above-mentioned welding process, when the bevel angle of top area θ 1 takes 40 degree of-60-40 degree of degree, 2 grooves of lateral region θ
Angle takes 40 degree of -30 degree, during root area 3 square grooves of θ, can take following several schemes：
1), top area θ 1 takes 120 degree, and the lateral region θ 2 of symmetrical both sides takes 80 degree, and root area θ 3 takes 80 degree.
2), top area θ 1 takes 115 degree, and the lateral region θ 2 of symmetrical both sides takes 80 degree, and root area θ 3 takes 85 degree.
3), top area θ 1 takes 125 degree, and the lateral region θ 2 of symmetrical both sides takes 80 degree, and root area θ 3 takes 75 degree.
4), top area θ 1 takes 115 degree, and the lateral region θ 2 of symmetrical both sides takes 85 degree, and root area θ 3 takes 75 degree.
5), top area θ 1 takes 125 degree, and the lateral region θ 2 of symmetrical both sides takes 75 degree, and root area θ 3 takes 85 degree.
6), top area θ 1 takes 118 degree, and the lateral region θ 2 of symmetrical both sides takes 75 degree, and root area θ 3 takes 92 degree.
7), top area θ 1 takes 122 degree, and the lateral region θ 2 of symmetrical both sides takes 75 degree, and root area θ 3 takes 78 degree.
By to groove welding region with etc. strong fillet weld region reasonable distribution, to top area and side in groove region
The reasonable distribution in portion region is ensureing being symmetrically welded for groove region, is reducing residual stress, making the weld strength of entire plumb joint
Under the premise of reaching welding requirements, multiple choices are provided, can be processed according to actual needs.
When being installed for common several steelframes, oblique steel pipe welding joint location is illustrated.
Embodiment 1
As shown in Figure 5：When soldered bar is horizontal, weld seam position is essentially flat horizontal position welding position, this position is manual
Welding technology is easily mastered.First, groove has been issued by design in manufactory, to part is needed to repair the rod piece cut, scene is interim to be used
Angle grinder carrys out reconditioning groove；Then, it holds out against assembling and multiple spot welding is carried out to weld seam, prepare for welding.Secondly, it is welded
It connects：First of realization back welding, symmetrical welding complete the welding of whole circle；Below according to the weld metal zone of division, using segmentation welding
Method, multi-pass welding complete welding.
Embodiment 2
As shown in Figure 6：When soldered bar is in vertical position, and top area is located at lower part, top area θ1Ranging from
Face upward horizontal position welding position, lateral region θ2For upward climbing welding position, root area θ3For straight angle welding position, welding point top area θ1Place
Welding difficulty is maximum.Front preparation is in the same manner as in Example 1, the welding sequence used in the welding process for：1), back cover
Weldering：Symmetrical welding completes the welding of whole circle.2), using segmentation welding method, multi-pass welding：First, it is symmetrically welded and completes θ2Area
Weld seam；Then, θ is welded3The fillet weld in the flat position in area, throat thickness reach half；Secondly, θ is completed in welding1Horizontal position welding is faced upward in area；Most
Afterwards, θ is completed3The welding of area's fillet weld in the flat position.3), cosmetic welding：Whole one of weld cap.Welding sequence is completed by, weldering
Seam quality tends to be protected.
Embodiment 3
As shown in Figure 7：When soldered bar is in vertical position, and top area is located at top, root area θ3Ranging from
Face upward horizontal position welding position, lateral region θ2It is welded for upward climbing, top area θ1For straight angle welding position.Due to root area θ3Belong to acute angle
Horizontal position welding position is faced upward, arc manipulation and sight are all not very good, and weld seam operation difficulty is especially big.The welding sequence used in the welding process
For：1), back welding：First in flat fillet weld position θ1One of soldering and sealing of area's bottoming, in root area θ3It faces upward the bottoming of horizontal position welding position and seals together in area
Weldering.2), using segmentation welding method, multi-pass welding：First, it is symmetrically welded and completes θ2The weld seam in area；Then, welding top θ1Area
Fillet weld in the flat position, throat thickness reaches half；Secondly, root θ is completed in welding3Horizontal position welding is faced upward in area；Finally, θ is completed1Area's flat fillet weld
The welding of seam.3), cosmetic welding：Whole one of weld cap.Welding sequence is completed by, and weldquality tends to obtain
It ensures.
Claims (6)
- A kind of 1. soldering method suitable for steel pipe and steel pipe oblique combination forming, it is characterised in that：Include the following steps：Step 1：Whole lap welding is stitched into subregion, including top area θ 1, lateral region θ 2 and root area θ 3, top area θ 1 Value range be 115 degree -125 degree, symmetrical both sides 2 value ranges of lateral region θ be 75 degree -85 degree, 3 values of root area θ Ranging from 75 degree -85 degree；The groove angle of top area θ 1 and lateral region θ 2 are determined according to the angle α between oblique pipe simultaneously Degree, 3 square grooves of root area θ；Step 2：According to the bevel angle in each region, groove has been issued to steel pipe, and local repair is carried out to groove and is cut；Step 3：The steel pipe cut to needs carries out holding out against assembling, and the symmetrical multiple spot welding that carries out realizes positioning, and standard is done for formal welding It is standby；Step 4：Realize welding, welding sequence is：1), back welding：Successively in 3 symmetrical bottoming of top area θ 1 and root area θ One of back welding, 2 symmetrical one of back welding of bottoming of lateral region θ in both sides, completes whole circle back welding；2) it, is applied using segmentation Welding method, multi-pass welding：First, the weld seam of monosymmetric lateral region θ 2 is completed in welding；Secondly, it is completed according to installation position The fillet weld in the flat position of top area θ 1 or root area θ 3, throat thickness reach half；Then, it completes and fillet weld in the flat position opposed area Face upward horizontal position welding seam；Finally complete the welding of the other half fillet weld in the flat position of top area θ 1 or root area θ 3；4), cosmetic welding：It is whole Body carries out one of weld cap；Step 5：Flaw detection is carried out to weld seam.
- 2. a kind of soldering method suitable for steel pipe and steel pipe oblique combination forming according to claim 1, special Sign is：The angle α takes 30 degree of -60 degree.
- 3. a kind of soldering method suitable for steel pipe and steel pipe oblique combination forming according to claim 2, special Sign is：When α=60 degree, the bevel angle variation of θ 1 is 40 degree of-60-40 degree of degree；2 bevel angles of θ take 40 degree of -30 degree.
- 4. a kind of soldering method suitable for steel pipe and steel pipe oblique combination forming according to claim 2, special Sign is：When α=45 degree, the bevel angle variation of θ 1 is 45 degree of-55-45 degree of degree；2 bevel angles of θ take 45 degree of -35 degree.
- 5. a kind of soldering method suitable for steel pipe and steel pipe oblique combination forming according to claim 2, special Sign is：When α=30 degree, the bevel angle variation of θ 1 is 40 degree of-50-40 degree of degree；2 bevel angles of θ take 40 degree of -30 degree.
- 6. a kind of soldering method suitable for steel pipe and steel pipe oblique combination forming according to claim 1, special Sign is：The bevel angle of the top area θ 1 and lateral region θ 2 can go up 3 degree of lower deviation.
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| CN107962277A (en) * | 2017-10-20 | 2018-04-27 | 中国二十冶集团有限公司 | For connecting pipe and the welding method of solder sphere |
| CN108952808A (en) * | 2018-07-04 | 2018-12-07 | 中铁六局集团有限公司 | Large volume internal axial pressure compensator installation engineering method |
| CN108856990B (en) * | 2018-07-18 | 2020-11-10 | 攀钢集团工程技术有限公司 | Method for welding inclined pipe by MAG welding |
| CN113427108B (en) * | 2021-06-24 | 2022-08-05 | 武汉一冶钢结构有限责任公司 | Preparation and welding method for groove of barrel at inlet and outlet of corner section of large-scale low-temperature wind tunnel |
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| DE2254147B2 (en) * | 1972-11-04 | 1977-04-14 | J. & W. Müller, Maschinen- und Armaturen-Fabrik GmbH, 5090 Leverkusen | METHOD OF CUTTING A PIPE ALONG THE PENETRATION CURVE OF THIS PIPE WITH A SECOND PIPE |
| JPS59141382A (en) * | 1983-01-31 | 1984-08-14 | Hitachi Zosen Corp | Welding method of steel pipe |
| JPS61169173A (en) * | 1985-01-21 | 1986-07-30 | Ishikawajima Harima Heavy Ind Co Ltd | Weldng method of branch pipe |
| JPS63278671A (en) * | 1987-05-07 | 1988-11-16 | Mitsubishi Heavy Ind Ltd | Saddle type weld line welding method for pipe intersection part |
| CN100391676C (en) * | 2005-02-22 | 2008-06-04 | 大连新船重工有限责任公司 | Technological method of partly submerged type platform complex K type node welding |
| CN100493799C (en) * | 2006-03-20 | 2009-06-03 | 上海锅炉厂有限公司 | Method of welding the plug in type connection tube and the un-orthogonal crossed connection joint of the cylinder |
| CN102069267A (en) * | 2011-01-25 | 2011-05-25 | 杭州凯尔达电焊机有限公司 | Universal arc welding robot teaching method regarding cylinder intersection welding seam |
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