CN104923894B - Large H-shaped steel full penetration angle welding exempts from back chipping welding procedure - Google Patents
Large H-shaped steel full penetration angle welding exempts from back chipping welding procedure Download PDFInfo
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- CN104923894B CN104923894B CN201510385715.8A CN201510385715A CN104923894B CN 104923894 B CN104923894 B CN 104923894B CN 201510385715 A CN201510385715 A CN 201510385715A CN 104923894 B CN104923894 B CN 104923894B
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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
- B23K9/18—Submerged-arc 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Abstract
The present invention relates to a kind of large H-shaped steel welding fabrication technique.A kind of large H-shaped steel full penetration angle welding exempts from back chipping welding procedure, it is 40~45mm for web thickness, wing plate thickness carries out full penetration angle welding for 50~55mm H profile steel and exempts from back chipping welding, its web uses double groove, without root face, double groove uses top for double V-groove and combination groove that bottom is the U-shaped slope of circular arc, retaining wall on slope is carried out again and is verified by groove verifying plate, and then to the group pair and welding of web and wing plate, the welding condition of the present invention is according to groove size, Fundamentals of Welding, the designs such as penetration requirement, web groove employs machining, process velocity is fast, it ensure that groove size precision and welding quality, welding once examines qualification rate to reach 98.3%.
Description
Technical field
The present invention relates to a kind of large H-shaped steel welding fabrication technique, and in particular to a kind of large H-shaped steel full penetration angle welding
Exempt from back chipping welding procedure.
Background technology
The positive high-rise heavy and large-span space steel construction development of construction steel structure, large space and extra space building
Demand is very vigorous.Large H-shaped steel is widely used in the post of Heavy Type Steel Structure in heavy construction, beam, the field such as crane girder.
At present, large H-shaped steel component is mainly assembled using welding manner, and heavy H-steel component generally uses thickness
For 35-55 steel plate as web and wing plate, and open in web both sides V-type or U-shaped technique groove and then enter web with wing plate
The assembled welding of row.
Existing process web groove uses double V-groove or U-shaped groove, and V-shaped retaining wall on slope is processed using gas flame cuttiug, processing
Efficiency high, but weld deposit amount is larger, wants back chipping to handle after welding, and welding deformation is larger.U-shaped groove machining, weld seam melts
Apply that amount is relative to be reduced, but need back chipping to handle after equally existing welding, the problem of welding deformation is larger, and retaining wall on slope efficiency compared with
It is low.
Leave and the welding bead between wing plate, web is carried out during web retaining wall on slope after 2-4mm root faces, wing plate, web assembling
Front welding, then carries out back chipping processing to the reverse side of welding bead with carbon arc air gouging, and removing face bonding is practiced midwifery raw weld defect.With
Carbon arc air gouging carries out back chipping processing, and welding job program is more, the cycle is long, not only increases wlding cost and energy consumption, and welding becomes
Shape is big, low production efficiency, and noise is big, and operative's environment is poor.
The content of the invention
The purpose of the present invention is to be directed to above-mentioned problem and shortage there is provided a kind of groove without root face, without back chipping,
The large H-shaped steel full penetration angle welding that operating efficiency can effectively be improved exempts from back chipping welding procedure.
To reach above-mentioned purpose, adopted the technical scheme that：
A kind of large H-shaped steel full penetration angle welding exempts from back chipping welding procedure, is 40~45mm for web thickness, and wing plate is thick
The H profile steel spent for 50~55mm carries out full penetration angle welding and exempts from back chipping welding, and it comprises the following steps：
1. groove is designed：Simulation lofting is carried out by graphics software by the actual (real) thickness to web and wing plate, it is ensured that weldering
The distance of silk end to the root of weld is as short as possible, and the angle adjustment of welding wire is directed at the friendship of wing plate, web to the center line of welding wire
Point, and ensure that welding wire on the premise of appearance electric discharge of not collided with remaining position of workpiece grooves, makes weld deposit amount as far as possible
It is few；So that it is determined that its web uses double groove, no root face, double groove uses that top is double V-groove and bottom is circular arc U
The combination groove on type slope, double V-groove angle is 35 °, and U-shaped groove is the circular arc that radius is 5mm；
2. retaining wall on slope and verification：After the web blanking of H profile steel, first it is angled with gas flame cuttiug web both sides shape
35 ° of two-sided double V-grooves, then use edge planer to dig U-shaped groove of the arc radius for 5mm in double V-groove root；According to setting-out mould
The groove size drawn up, makes the groove verifying plate that complementation is matched with groove, and overall verification is carried out to groove；
3. the group pair and weld preparation of web and wing plate：The zero clearance group of web and wing plate is carried out in H profile steel grouping machine
It is right, and run-on tab is set at weld seam two ends；Polishing cleaning is carried out with sanding machine to weld seam both sides 20mm~30mm regions, makes its table
Metallic luster is showed out, drying and processing is carried out to weld seam and neighboring area, the moisture on steel plate is removed, welding machine running track is adjusted
It is parallel with weld seam, prepare welding；
4. weld：Weld seam is welded using Lincoln weld, front first pass welding, the welding wire of selection are carried out first
A diameter of 4mm, welding current 600-650A, voltage 33-36V, speed of welding 38-40cm/min；Then reverse side first pass is carried out
Welding, the gage of wire of selection is 4mm, welding current 700-750A, voltage 30-32V, speed of welding 36-38cm/min；Finally
It is filled and cover welding.
Described step 4. in, according to prosposition Lincoln weld weld, the angle between its welding wire center line and wing plate
For 21 °.
Described step 4. in, welded according to accommodation Lincoln weld, the welding positioner tilt angle gamma of making is 28 °, really
Shield welding wire is vertical.
Described step 4. in, filling and cover welding, its select gage of wire be 4mm, welding current 500-550A,
Voltage 34-38V, speed of welding 36-38cm/min.
Using above-mentioned technical proposal, acquired beneficial effect is：
1) compared with the prior art, its web groove designs corresponding welding condition and its to the present invention without root face
Supporting, reverse side selects larger welding current, and the weld defect that front is welded on into root generation is removed, it is not necessary to carry out reverse side
Back chipping processing, reduces welding job program, eliminates back chipping workload, improve efficiency, reduces cost of manufacture, and nothing is made an uproar
Sound, improves the operating environment of workman.
2) present invention can reduce weld deposit amount 15.7%.Groove size is to be penetrated according to component actual size for guarantee
Customized best angle, decreases welding deformation, the welding deformation of H profile steel is by passing while weld deposit amount is reduced
The 15-20mm for technique of uniting, is reduced to 8-12mm；
3) welding condition of the invention is designed according to groove size, Fundamentals of Welding, penetration requirement etc., and web groove is adopted
With machining, process velocity is fast, it is ensured that groove size precision and welding quality, and welding once examines qualification rate to reach
98.3%.
Brief description of the drawings
Fig. 1 is prosposition welding structure schematic diagram.
Fig. 2 is accommodation welding structure schematic diagram.
Sequence number in figure：1 it is web, 2 be wing plate, 3 be welding wire, 4 be welding positioner, 5 is welding machine.
Embodiment
The embodiment of the present invention is elaborated below in conjunction with accompanying drawing.
Referring to Fig. 1, Fig. 2, a kind of large H-shaped steel full penetration angle welding exempts from back chipping welding procedure, is 40 for web thickness
~45mm, wing plate thickness carries out full penetration angle welding for 50~55mm H profile steel and exempts from back chipping welding, and it includes following step
Suddenly：
1. groove is designed：Simulation lofting is carried out by graphics software by the actual (real) thickness to web and wing plate, it is ensured that weldering
The distance of silk end to the root of weld is as short as possible, to be welded using short arc, the center line of the angle adjustment of welding wire 3 to welding wire
Be aligned wing plate 2, the intersection point of web 1, make to occur without non-penetration, incomplete fusion defect during welding, and ensure welding wire not with workpiece slope
Remaining position of mouth is collided on the premise of appearance electric discharge, makes weld deposit amount as few as possible；So that it is determined that its web 1 is using two-sided
Groove, no root face, double groove uses top for double V-groove and combination groove that bottom is the U-shaped slope of circular arc, double V-groove angle
Spend for 35 °, U-shaped groove is the circular arc that radius is 5mm；
2. retaining wall on slope and verification：After the blanking of web 1 of H profile steel, first it is angled with the both sides shape of gas flame cuttiug web 1
35 ° of two-sided double V-groove, then the U-shaped groove that arc radius R is 5mm is dug with edge planer in double V-groove root；According to setting-out
The groove size simulated, makes the groove verifying plate that complementation is matched with groove, and overall verification is carried out to groove；
3. the group pair and weld preparation of web and wing plate：The zero clearance of web 1 and wing plate 2 is carried out in H profile steel grouping machine
Group pair, and run-on tab is set at weld seam two ends, to prevent starting during the welding starting the arc because electric current, voltage instability are difficult to weldquality
Ensure；Polishing cleaning is carried out with sanding machine to weld seam both sides 20mm~30mm regions, its surface is exposed metallic luster, to weld seam
And neighboring area carries out drying and processing, the moisture on steel plate is removed, the adjustment running track of welding machine 5 is parallel with weld seam, prepares welding；
4. weld：Welded using prosposition Lincoln weld welding or accommodation Lincoln weld, when automatic using prosposition submerged arc
During weldering welding, the angle β between its welding wire center line and wing plate 2 is 21 °；When using accommodation Lincoln weld welding, make
Welding positioner tilt angle gamma be 28 °；
Weld seam is welded using Lincoln weld, front first pass welding is carried out first, the gage of wire of selection is
4mm, welding current 600-650A, voltage 33-36V, speed of welding 38-40cm/min；Reverse side first pass welding is being carried out, is being selected
Gage of wire be 4mm, welding current 700-750A, voltage 30-32V, speed of welding 36-38cm/min；Finally it is filled
And cover welding, the gage of wire of selection is 4mm, welding current 500-550A, voltage 34-38V, speed of welding 36-38cm/
Min, welding condition is as shown in table 1 below.
Table 1：
Table 2 is the general expenses table saved compared to conventional bonding technique：
Table 2-1
Table 2-2
Table 2-3
It is total：21.7656 ten thousand yuan.
Claims (4)
1. a kind of large H-shaped steel full penetration angle welding exempts from back chipping welding procedure, it is characterised in that for web thickness be 40~
45mm, wing plate thickness carries out full penetration angle welding for 50~55mm H profile steel and exempts from back chipping welding, and it comprises the following steps：
1. groove is designed：Simulation lofting is carried out by graphics software by the actual (real) thickness to web and wing plate, it is ensured that end of welding
The distance of portion to the root of weld is as short as possible, and the angle adjustment of welding wire is directed at the intersection point of wing plate, web to the center line of welding wire, and
Ensure that welding wire on the premise of appearance electric discharge of not collided with remaining position of workpiece grooves, makes weld deposit amount as few as possible；From
And determining that its web uses double groove, no root face, double groove uses that top is double V-groove and bottom is the U-shaped slope of circular arc
Combination groove, double V-groove angle be 35 °, U-shaped groove is the circular arc that radius is 5mm；
2. retaining wall on slope and verification：After the web blanking of H profile steel, 35 ° pairs are first angled with gas flame cuttiug web both sides shape
Face double V-groove, then use edge planer to dig U-shaped groove of the arc radius for 5mm in double V-groove root；Simulated according to setting-out
Groove size, make match with groove complementation groove verifying plate, to groove progress entirety verification；
3. the group pair and weld preparation of web and wing plate：The zero clearance group pair of web and wing plate is carried out in H profile steel grouping machine, and
At weld seam two ends, run-on tab is set；Polishing cleaning is carried out with sanding machine to weld seam both sides 20mm~30mm regions, reveals its surface
Go out metallic luster, drying and processing is carried out to weld seam and neighboring area, remove the moisture on steel plate, adjustment welding machine running track and weldering
Seam is parallel, prepares welding；
4. weld：Weld seam is welded using Lincoln weld, front first pass welding, the gage of wire of selection are carried out first
For 4mm, welding current 600-650A, voltage 33-36V, speed of welding 38-40cm/min；Then reverse side first pass welding is carried out,
The gage of wire of selection is 4mm, welding current 700-750A, voltage 30-32V, speed of welding 36-38cm/min；Finally carry out
Filling and cover welding.
2. large H-shaped steel full penetration angle welding according to claim 1 exempts from back chipping welding procedure, it is characterised in that described
The step of 4. in, according to prosposition Lincoln weld weld, the angle between its welding wire center line and wing plate is 21 °.
3. large H-shaped steel full penetration angle welding according to claim 1 exempts from back chipping welding procedure, it is characterised in that described
The step of 4. in, welded according to accommodation Lincoln weld, the welding positioner tilt angle gamma of making is 28 °, it is ensured that welding wire is vertical.
4. large H-shaped steel full penetration angle welding according to claim 1 exempts from back chipping welding procedure, it is characterised in that described
The step of 4. in, described filling and cover welding, its select gage of wire be 4mm, welding current 500-550A, voltage
34-38V, speed of welding 36-38cm/min.
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| CN105196005B (en) * | 2015-10-28 | 2018-05-18 | 上海振华港机重工有限公司 | Equalizer bar longitudinal joint exempts from the complete molten submerged-arc welding moulding process of back chipping |
| CN105945409B (en) * | 2016-05-24 | 2018-01-05 | 上海外高桥造船有限公司 | The welding method of hatch coaming |
| CN105834561A (en) * | 2016-06-06 | 2016-08-10 | 中建钢构有限公司 | Method for back-chipping-free full penetration weld of H-shaped steel |
| CN106475785A (en) * | 2016-09-30 | 2017-03-08 | 中建钢构阳光惠州有限公司 | A kind of H profile steel intelligence assembly-welding device and intelligent assembly welding method |
| CN106736262A (en) * | 2016-11-24 | 2017-05-31 | 唐山开元特种焊接设备有限公司 | H profile steel production technology |
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| CN110666312A (en) * | 2019-10-22 | 2020-01-10 | 中国一冶集团有限公司 | Full penetration back-gouging-free welding process for H-shaped steel |
| CN110666314A (en) * | 2019-10-28 | 2020-01-10 | 江苏金华普钢结构工程有限公司 | High-efficiency welding process of steel structure based on BH submerged arc welding |
| CN114250908B (en) * | 2020-12-31 | 2023-05-26 | 江苏沪宁钢机股份有限公司 | Longitudinal and transverse partition plate in oversized-section box body and manufacturing method thereof |
| CN113843592B (en) * | 2021-10-15 | 2024-01-12 | 中建钢构工程有限公司 | Double-gun bottoming welding method |
| CN113878310A (en) * | 2021-10-21 | 2022-01-04 | 中国电建集团江西省水电工程局有限公司 | Fusion penetration welding method for T-shaped joint of thick plate |
| CN114309903A (en) * | 2022-03-07 | 2022-04-12 | 中铁长安重工有限公司 | Welding positioning device and method for I-shaped beam without back chipping |
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