CN110666314A - High-efficiency welding process of steel structure based on BH submerged arc welding - Google Patents
High-efficiency welding process of steel structure based on BH submerged arc welding Download PDFInfo
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- CN110666314A CN110666314A CN201911030528.2A CN201911030528A CN110666314A CN 110666314 A CN110666314 A CN 110666314A CN 201911030528 A CN201911030528 A CN 201911030528A CN 110666314 A CN110666314 A CN 110666314A
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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
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Abstract
The invention discloses a high-efficiency welding process of a steel structure based on BH submerged arc welding, which comprises the following steps: step a, arranging two lifting devices on a base plate, wherein the inner sides of the upper parts of the two lifting devices are connected with two supporting plates, meanwhile, two telescopic cylinders are arranged on the inner sides of the middle parts of the lifting devices, and the front ends of the telescopic cylinders are provided with pressing plates; b, forming grooves on the front and back of two ends of the web plate; c, placing one wing plate on the base plate, placing the other wing plate on the two support plates, and vertically placing the web plate between the two wing plates; d, removing rust and oil stains on the surface of the groove and within 25mm of each of the two sides of the groove by using a grinding wheel or a steel wire brush; step e, adopting submerged-arc welding to carry out automatic welding; and f, finally, filling and cover surface welding are carried out. The high-efficiency welding process of the steel structure based on the BH submerged arc welding, provided by the invention, has the advantages that the manpower is liberated, the welding efficiency is improved, meanwhile, the web plate can be effectively fixed, and the welding quality reduction caused by the offset of the web plate in the welding process is avoided.
Description
Technical Field
The invention relates to an efficient welding process of a steel structure based on BH submerged arc welding, and belongs to the technical field of steel structures.
Background
The H-shaped steel is an economic section efficient section with more optimized section area distribution and more reasonable strength-to-weight ratio, and is widely applied to various civil and industrial building structures, various large-span industrial plants and modern high-rise buildings. The H steel consists of two parallel wing plates and a web plate, the web plate is positioned between the two wing plates and is respectively vertical to the two wing plates, and four welding seams to be welded can be formed between the upper end and the lower end of the web plate and the wing plates. Submerged arc welding is a method of welding by burning an electric arc under a flux layer, has the inherent advantages of stable welding quality, high welding productivity, no arc light, little smoke and the like, and is applied to a welding process of steel. In the prior art, the wing plate and the web plate are generally fixed in a manual mode and then welded. Thus, the method has the problems of time and labor waste and low efficiency; in addition, manually, the strakes and webs may be subject to misalignment, which can seriously affect the quality of the weld. The other point is that the welding seam is long, the temperature of the place to be welded is high firstly, the temperature of the place to be welded is low later, and the temperatures of the two sides of the steel plate to be welded are different, so that the welding seam to be welded slightly shifts and even distorts. If the fixing effect is poor, the web can be twisted left and right or bent upwards or downwards along the vertical direction, and the welding quality can be greatly influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an efficient welding process of a steel structure based on BH submerged arc welding, which frees manpower, improves welding efficiency, can effectively fix a web plate and avoids welding quality reduction caused by the offset of the web plate in the welding process.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a high-efficiency welding process of a steel structure based on BH submerged arc welding comprises the following steps:
step a, arranging two lifting devices on a base plate, wherein the inner sides of the upper parts of the two lifting devices are connected with two supporting plates, meanwhile, two telescopic cylinders are arranged on the inner sides of the middle parts of the lifting devices, and the front ends of the telescopic cylinders are provided with pressing plates;
b, forming grooves on the front and back of the two ends of the web plate, wherein the angle of the groove is 40-45 degrees;
c, placing one wing plate on the base plate, placing the other wing plate on the two support plates, vertically placing the web plate between the two wing plates, after the position of the web plate is adjusted, controlling the telescopic cylinder to extend, pressing the pressure plates on two sides of the web plate tightly, and then controlling the lifting device to descend until the lower surface of the wing plate on the upper side is contacted with the upper end of the web plate;
d, removing rust and oil stains on the surface of the groove and within 25mm of each of the two sides of the groove by using a grinding wheel or a steel wire brush;
step e, adopting submerged-arc welding for automatic welding, firstly carrying out first welding on the left side of the web plate, and then carrying out first welding on the right side of the web plate; then, performing second welding on the left surface of the web plate and second welding on the right surface of the web plate;
and f, finally, filling and cover surface welding are carried out, after welding is finished, the telescopic air cylinder is controlled to be shortened, the pressing plate is driven to move towards two sides, the lifting device is controlled to move upwards, and the welded H steel is moved out.
In step e, the wire extension is controlled to be 22 to 26 mm.
In the step e, the parameters of the first welding process on the left side are specifically as follows: the diameter of a welding wire is 4.0mm, the welding current is 400-450A, the arc voltage is 26-28V, and the welding speed is 430-480 mm.min-1。
In the step e, the parameters of the welding process for the first right pass are specifically as follows: the diameter of a welding wire is 4.0mm, the welding current is 630-680A, the arc voltage is 28-31V, and the welding speed is 430-480 mm.min-1。
In the step b, the bevel angle is 42 degrees.
And e, after each welding pass is finished, completely removing the slag shell, and then carrying out the next welding pass.
The invention has the beneficial effects that: according to the high-efficiency welding process of the steel structure based on the BH submerged arc welding, the wing plate is supported through the support plate, the web plate is fixed through the pressure plate, the defect of manual operation can be overcome, the high-efficiency welding process has the advantages of being simple in operation and high in efficiency, the fixing effect is good, and welding quality reduction caused by the fact that the web plate deviates in the welding process is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a device for using the high-efficiency welding process of the steel structure based on BH submerged arc welding.
The reference numbers in the figures are as follows: 1-base plate, 2-lifting device, 3-support plate, 4-telescopic cylinder, 5-pressure plate, 6-wing plate and 7-web plate.
Detailed Description
The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.
As shown in FIG. 1, the invention provides a high-efficiency welding process of a steel structure based on BH submerged arc welding, which comprises the following steps:
step one, two lifting devices 2 are arranged on a substrate 1, two supporting plates 3 are connected to the inner sides of the upper portions of the two lifting devices 2, two telescopic cylinders 4 are arranged on the inner sides of the middle portions of the two lifting devices 2, and a pressing plate 5 is arranged at the front ends of the telescopic cylinders 4.
And step two, forming grooves on the front surface and the back surface of the two ends of the web 7, wherein the angle of the groove is 40-45 degrees, and preferably 42 degrees.
And step three, placing one wing plate 6 on the base plate 1, placing the other wing plate 6 on the two support plates 3, vertically placing the web plate 7 between the two wing plates 6, after adjusting the position of the web plate 7, controlling the telescopic air cylinder 4 to extend, tightly pressing the pressure plates 5 on two sides of the web plate 7, and then controlling the lifting device 2 to descend until the lower surface of the wing plate 6 on the upper surface is contacted with the upper end of the web plate 7.
And step four, removing iron rust and oil dirt on the surface of the groove and within 25mm of each of the two sides of the groove by using a grinding wheel or a steel wire brush, and avoiding influencing the welding quality.
Fifthly, adopting submerged arc welding for automatic welding, firstly carrying out first welding on the left side of the web 7, and then carrying out first welding on the right side of the web 7; and then performing second welding on the left surface of the web 7 and second welding on the right surface of the web 7.
The wire stick out length is controlled to be 22 to 26 mm. The parameters of the first welding process on the left side are as follows: the diameter of a welding wire is 4.0mm, the welding current is 400-450A, the arc voltage is 26-28V, and the welding speed is 430-480 mm.min-1. The right first welding process parameters are as follows: the diameter of a welding wire is 4.0mm, the welding current is 630-680A, the arc voltage is 28-31V, and the welding speed is 430-480 mm.min-1. And after each welding pass, the slag shell is thoroughly removed, and then the next welding pass is carried out.
And step six, finally, filling and cover surface welding are carried out, after welding is finished, the telescopic air cylinder 4 is controlled to be shortened, the pressing plate 5 is driven to move towards two sides, the lifting device 2 is controlled to move upwards, and the welded H steel is moved out at the moment.
The above is only a preferred embodiment of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. A high-efficiency welding process of a steel structure based on BH submerged arc welding is characterized in that: the method comprises the following steps:
step a, arranging two lifting devices (2) on a substrate (1), connecting two supporting plates (3) on the inner sides of the upper parts of the two lifting devices (2), arranging two telescopic cylinders (4) on the inner sides of the middle parts of the lifting devices (2), and arranging a pressing plate (5) at the front ends of the telescopic cylinders (4);
b, forming grooves on the front and back of two ends of the web plate (7), wherein the angle of the groove is 40-45 degrees;
c, placing one wing plate (6) on the base plate (1), placing the other wing plate (6) on the two support plates (3), vertically placing a web plate (7) between the two wing plates (6), controlling the telescopic cylinder (4) to extend after adjusting the position of the web plate (7), tightly pressing the pressure plates (5) on two sides of the web plate (7), and then controlling the lifting device (2) to descend until the lower surface of the wing plate (6) on the upper surface is contacted with the upper end of the web plate (7);
d, removing rust and oil stains on the surface of the groove and within 25mm of each of the two sides of the groove by using a grinding wheel or a steel wire brush;
step e, adopting submerged arc welding to perform automatic welding, firstly performing first welding on the left side of the web plate (7), and then performing first welding on the right side of the web plate (7); then, performing second welding on the left surface of the web plate (7) and second welding on the right surface of the web plate (7);
and f, finally, filling and cover surface welding are carried out, after welding is finished, the telescopic air cylinder (4) is controlled to be shortened, the pressing plate (5) is driven to move towards two sides, the lifting device (2) is controlled to move upwards, and the welded H steel is moved out at the moment.
2. The high-efficiency welding process of the steel structure based on BH submerged arc welding according to claim 1, characterized in that: in step e, the wire extension is controlled to be 22 to 26 mm.
3. The high-efficiency welding process of the steel structure based on BH submerged arc welding according to claim 1, characterized in that: in the step e, the parameters of the first welding process on the left side are specifically as follows: the diameter of a welding wire is 4.0mm, the welding current is 400-450A, the arc voltage is 26-28V, and the welding speed is 430-480 mm.min-1。
4. The high-efficiency welding process of the steel structure based on BH submerged arc welding according to claim 1, characterized in that: in the step e, the parameters of the welding process for the first right pass are specifically as follows: the diameter of a welding wire is 4.0mm, the welding current is 630-680A, the arc voltage is 28-31V, and the welding speed is 430-480 mm.min-1。
5. The high-efficiency welding process of the steel structure based on BH submerged arc welding according to claim 1, characterized in that: in the step b, the bevel angle is 42 degrees.
6. The high-efficiency welding process of the steel structure based on BH submerged arc welding according to claim 1, characterized in that: and e, after each welding pass is finished, completely removing the slag shell, and then carrying out the next welding pass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911030528.2A CN110666314A (en) | 2019-10-28 | 2019-10-28 | High-efficiency welding process of steel structure based on BH submerged arc welding |
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| CN201911030528.2A CN110666314A (en) | 2019-10-28 | 2019-10-28 | High-efficiency welding process of steel structure based on BH submerged arc welding |
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| JP2000225463A (en) * | 1999-02-03 | 2000-08-15 | Topy Ind Ltd | Shape steel assembly device without tack welding |
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| CN103785934A (en) * | 2014-03-03 | 2014-05-14 | 山东电力建设第二工程公司 | Thin-plate H-type steel and main angular welding joint full penetration welding method in full penetration welding process |
| CN104625357A (en) * | 2013-11-15 | 2015-05-20 | 上海中远川崎重工钢结构有限公司 | H-steel or T-steel full-penetration back-gouging-free welding method |
| CN104923894A (en) * | 2015-07-03 | 2015-09-23 | 中国有色金属工业第六冶金建设有限公司 | Full penetration fillet weld back-chipping-free welding process for large-scale H-shaped steel |
| CN108788410A (en) * | 2018-07-02 | 2018-11-13 | 中国电建集团核电工程有限公司 | T-steel full penetration exempts from back chipping welding method |
| CN108788543A (en) * | 2018-05-29 | 2018-11-13 | 滁州南钢盛达实业有限公司 | A kind of H profile steel driving clamping device |
| CN108788583A (en) * | 2018-08-13 | 2018-11-13 | 芜湖鼎恒材料技术有限公司 | A kind of symmetrical welder of H profile steel processing and forming |
| CN109048162A (en) * | 2018-08-13 | 2018-12-21 | 芜湖鼎恒材料技术有限公司 | A kind of fixed device of H profile steel spicing forming type |
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2019
- 2019-10-28 CN CN201911030528.2A patent/CN110666314A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000225463A (en) * | 1999-02-03 | 2000-08-15 | Topy Ind Ltd | Shape steel assembly device without tack welding |
| JP2000280070A (en) * | 1999-03-30 | 2000-10-10 | Nkk Corp | Method and device for manufacturing built-up longe |
| CN203282125U (en) * | 2013-05-29 | 2013-11-13 | 天津市万尔特钢结构有限公司 | Assembly welding equipment for H-shaped steel |
| CN104625357A (en) * | 2013-11-15 | 2015-05-20 | 上海中远川崎重工钢结构有限公司 | H-steel or T-steel full-penetration back-gouging-free welding method |
| CN103785934A (en) * | 2014-03-03 | 2014-05-14 | 山东电力建设第二工程公司 | Thin-plate H-type steel and main angular welding joint full penetration welding method in full penetration welding process |
| CN104923894A (en) * | 2015-07-03 | 2015-09-23 | 中国有色金属工业第六冶金建设有限公司 | Full penetration fillet weld back-chipping-free welding process for large-scale H-shaped steel |
| CN108788543A (en) * | 2018-05-29 | 2018-11-13 | 滁州南钢盛达实业有限公司 | A kind of H profile steel driving clamping device |
| CN108788410A (en) * | 2018-07-02 | 2018-11-13 | 中国电建集团核电工程有限公司 | T-steel full penetration exempts from back chipping welding method |
| CN108788583A (en) * | 2018-08-13 | 2018-11-13 | 芜湖鼎恒材料技术有限公司 | A kind of symmetrical welder of H profile steel processing and forming |
| CN109048162A (en) * | 2018-08-13 | 2018-12-21 | 芜湖鼎恒材料技术有限公司 | A kind of fixed device of H profile steel spicing forming type |
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