CN114515917B - Welding method for truss layer corner column - Google Patents
Welding method for truss layer corner column Download PDFInfo
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- CN114515917B CN114515917B CN202210113929.XA CN202210113929A CN114515917B CN 114515917 B CN114515917 B CN 114515917B CN 202210113929 A CN202210113929 A CN 202210113929A CN 114515917 B CN114515917 B CN 114515917B
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- forging
- preheating
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- 238000003466 welding Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000005242 forging Methods 0.000 claims abstract description 50
- 238000005485 electric heating Methods 0.000 claims abstract description 10
- 238000000137 annealing Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000004321 preservation Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
Classifications
-
- 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
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
- C21D9/505—Cooling thereof
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a method for assembling and welding a truss layer corner post, which comprises the following steps: welding the box-shaped forging piece with the end of the box body respectively, and preheating the welding position before welding by adopting an electric heating method; setting up a jig frame according to the assembly inclination of the box forging and the bracket and the requirement of a design drawing, keeping the inclination of a plate for supporting the bracket at the topmost end of the jig frame consistent with the inclination of the bracket, assembling the protruding positions of the bracket 1 at the upper part and the bracket 4 at the lower part with the forging, and assembling the bracket 2 and the bracket 3 with the other two surface positions of the box forging; and (3) carrying out annealing treatment on the welding seam between the box body end head and the bracket and the box-shaped forge piece. The welding seam planning method of the bracket has the advantages that the welding seam planning is carried out on the components, the phenomenon that the welding seam is too concentrated is avoided, meanwhile, in the welding method, the web plate connected with the bracket flange plate is changed into the permeable web plate, the thickness is thinner, the intermittent connection is realized, the welding quantity of the bracket is reduced, and the material and the manufacturing cost are saved.
Description
Technical Field
The invention relates to the technical field of installation of large-scale forging steel structural members, in particular to a method for assembling and welding a truss layer corner column.
Background
Currently, there are more and more super high-rise buildings, and these super high-rise buildings often have more large complex truss members; among these, typical of such members are truss deck corner posts, which are typically large in sheet thickness and are extremely difficult to correct after welding deformation for thicker sheet materials, and large amounts of welding can result in longitudinal lamellar tearing of the sheet. Moreover, the phenomenon of concentration and even overlapping exists in the welding seam, the welding deformation is extremely difficult to control due to the large welding quantity, the working quantity of a manufacturing team is increased, the manufacturing cost of a factory is increased, and the actual production is greatly affected.
Disclosure of Invention
The present invention aims to overcome the above-mentioned drawbacks and to provide a method for improving the quality and efficiency of welding truss layer corner posts or similar large forged steel members.
In order to achieve the above object, the present invention is achieved by:
the truss layer corner column comprises a box forging (1), a box end (2) is arranged at the end part of the forging (1), a bracket (3) is further arranged, the bracket (3) is connected with the box forging (1) through the box end (2), a bracket web (4) is further arranged on the bracket (3), the box forging (1) is irregularly shaped, two protrusions extend out from the welding position of two surfaces and the bracket (3), and the other two surfaces of the box forging (1) are plane and have no protrusions; the welding method of the truss layer corner post comprises the following steps:
step 1, welding a box forging piece (1) with a box end head (2) respectively, wherein an assembly gap at the joint of the box end head (2) and the box forging piece (1) is 10mm, a backing plate with a single-sided groove formed on the back surface of the box forging piece (1) and with a PL6 x 30 is additionally arranged for welding, the groove angle is 28 degrees, preheating is carried out on the welding position before welding, the preheating temperature is 120 ℃, and the preheating is carried out by adopting an electric heating method;
step 2, erecting a jig frame according to the assembly inclination of the box forging (1) and the bracket (3) and the requirement of a design drawing, wherein the inclination of the top end of the jig frame for supporting the plate of the bracket (3) is consistent with the inclination of the bracket (3),
step 2.1, numbering the bracket (3) into a bracket No. 1, a bracket No. 2, a bracket No. 3 and a bracket No. 4 according to the upper, middle and lower three sequences respectively;
step 2.2, assembling the upper bracket No. 1, the lower bracket No. 4 and the bulge position of the forging piece, wherein the assembly gap is 10mm, the groove form is a double V groove, the angle is 28 degrees,
2.3, before assembly, arranging baffle plates (5) on the bracket No. 1 and the bracket No. 4 respectively, wherein the baffle plates (5) are used for fixing the bracket No. 1 and the bracket No. 4 on the jig frame to prevent the bracket from sliding, preheating treatment is needed to be carried out on the welding position before welding, the preheating temperature is 120 ℃, and the preheating is carried out by adopting an electric heating method;
step 3, assembling the bracket No. 2 and the bracket No. 3 with the other two surfaces of the box forging (1), wherein the assembly gap is 10mm, the bevel is a single V bevel, the angle is 28 degrees, the welding position is required to be preheated before welding, the preheating temperature is 120 ℃, and the preheating and the welding are performed by adopting an electric heating method;
and 4, annealing the welding seam between the box body end (2) and the bracket (3) and the box forging (1).
According to the welding method of the truss layer corner post, the annealing treatment in the step 4 is used for eliminating welding stress, and the specific steps include:
step 4.1, freely heating the temperature of the weld joint stress relief area before reaching 400 ℃;
step 4.2, when the temperature is increased between 400 ℃ and 560 ℃, the heating rate Vs=55 ℃/h per hour;
step 4.3, when the temperature reaches 560 ℃, preserving heat for 2.5 hours, wherein the temperature difference between any two points in a heating area in the heat preservation period is not more than 85 ℃;
step 4.4, controlling the atmosphere of the heating zone during the heating and heat preservation period to prevent the surface of the weldment from being excessively oxidized;
step 4.5, when the temperature of the weld joint stress relief area is reduced between 400 and 560 ℃, the cooling rate vj=65 ℃/h per hour;
step 4.6, stopping heating when the temperature is reduced to 400 ℃, and performing air cooling;
and 4.7, carrying out heat preservation on the heat treatment area by using heat preservation cotton, and reducing the temperature gradient.
The assembling and welding method provided by the invention is suitable for a steel structure node form formed by large-scale forgings, and compared with a conventional corner column, the assembling and welding amount of a conventional column body box body is avoided; meanwhile, the welding seam of the component is planned, so that the phenomenon that the welding seam is too concentrated is avoided, and the safety of the structure is improved; meanwhile, in the assembly welding method, the web plate connected with the bracket flange plate is changed into the permeable web plate, so that the thickness is thinner, and the bracket flange plate is intermittently connected, so that the welding amount of the bracket is reduced, the material and manufacturing cost are saved, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the welding of a two-ended case to a forging in the method of the present invention.
FIG. 2 is a schematic diagram showing the details of welding the two-end box and the forging in the method of the present invention.
FIG. 3 is a schematic diagram of the bracket and forging assembly in the method of the present invention.
FIG. 4 is a schematic view of a weld groove of a bracket and forging boss butt joint shown in the method of the present invention.
FIG. 5 is a schematic view of the butt welding of brackets and forging projections in the method of the present invention.
FIG. 6 is a schematic diagram of the assembly of the bracket with the other two sides of the forging shown in the method of the present invention.
FIG. 7 is a schematic view of butt welding of the bracket to the other two sides of the forging shown in the method of the present invention.
FIG. 8 is a graph of the annealing profile shown in the method of the present invention.
FIG. 9 is a schematic diagram of weld stress relief annealing heating in accordance with the method of the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in fig. 1-9, the truss layer corner column comprises a box forging (1), a box end (2) is arranged at the end part of the forging (1), a bracket (3) is further arranged, the bracket (3) is connected with the box forging (1) through the box end (2), a bracket web (4) is further arranged on the bracket (3), the box forging (1) is irregularly shaped, two protrusions extend out from the welding position of two surfaces and the bracket (3), and the other two surfaces of the box forging (1) are plane and have no protrusions; the welding method of the truss layer corner post comprises the following steps:
step 1, welding a box forging piece (1) with a box end head (2) respectively, wherein an assembly gap at the joint of the box end head (2) and the box forging piece (1) is 10mm, a backing plate with a single-sided groove formed on the back surface of the box forging piece (1) and with a PL6 x 30 is additionally arranged for welding, the groove angle is 28 degrees, preheating is carried out on the welding position before welding, the preheating temperature is 120 ℃, and the preheating is carried out by adopting an electric heating method;
step 2, erecting a jig frame according to the assembly inclination of the box forging (1) and the bracket (3) and the requirement of a design drawing, wherein the inclination of the top end of the jig frame for supporting the plate of the bracket (3) is consistent with the inclination of the bracket (3),
step 2.1, numbering the bracket (3) into a bracket No. 1, a bracket No. 2, a bracket No. 3 and a bracket No. 4 according to the upper, middle and lower three sequences respectively;
step 2.2, assembling the upper bracket No. 1, the lower bracket No. 4 and the bulge position of the forging piece, wherein the assembly gap is 10mm, the groove form is a double V groove, the angle is 28 degrees,
2.3, before assembly, arranging baffle plates (5) on the bracket No. 1 and the bracket No. 4 respectively, wherein the baffle plates (5) are used for fixing the bracket No. 1 and the bracket No. 4 on the jig frame to prevent the bracket from sliding, preheating treatment is needed to be carried out on the welding position before welding, the preheating temperature is 120 ℃, and the preheating is carried out by adopting an electric heating method;
step 3, assembling the bracket No. 2 and the bracket No. 3 with the other two surfaces of the box forging (1), wherein the assembly gap is 10mm, the bevel is a single V bevel, the angle is 28 degrees, the welding position is required to be preheated before welding, the preheating temperature is 120 ℃, and the preheating and the welding are performed by adopting an electric heating method;
and 4, annealing the welding seam between the box body end (2) and the bracket (3) and the box forging (1).
According to the welding method of the truss layer corner post, the annealing treatment in the step 4 is used for eliminating welding stress, and the specific steps include:
step 4.1, freely heating the temperature of the weld joint stress relief area before reaching 400 ℃;
step 4.2, when the temperature is increased between 400 ℃ and 560 ℃, the heating rate Vs=55 ℃/h per hour;
step 4.3, when the temperature reaches 560 ℃, preserving heat for 2.5 hours, wherein the temperature difference between any two points in a heating area in the heat preservation period is not more than 85 ℃;
step 4.4, controlling the atmosphere of the heating zone during the heating and heat preservation period to prevent the surface of the weldment from being excessively oxidized;
step 4.5, when the temperature of the weld joint stress relief area is reduced between 400 and 560 ℃, the cooling rate vj=65 ℃/h per hour;
step 4.6, stopping heating when the temperature is reduced to 400 ℃, and performing air cooling;
and 4.7, carrying out heat preservation on the heat treatment area by using heat preservation cotton, and reducing the temperature gradient.
The assembling and welding method provided by the invention is suitable for a steel structure node form formed by large-scale forgings, and compared with a conventional corner column, the assembling and welding amount of a conventional column body box body is avoided; meanwhile, the welding seam of the component is planned, so that the phenomenon that the welding seam is too concentrated is avoided, and the safety of the structure is improved; meanwhile, in the assembly welding method, the web plate connected with the bracket flange plate is changed into the permeable web plate, so that the thickness is thinner, and the bracket flange plate is intermittently connected, so that the welding amount of the bracket is reduced, the material and manufacturing cost are saved, and the working efficiency is improved.
Claims (2)
1. The truss layer corner column comprises a box forging (1), a box end (2) is arranged at the end part of the forging (1), a bracket (3) is further arranged, the bracket (3) is connected with the box forging (1) through the box end (2), a bracket web (4) is further arranged on the bracket (3), the box forging (1) is irregularly shaped, two protrusions extend out from the welding position of two surfaces and the bracket (3), and the other two surfaces of the box forging (1) are plane and have no protrusions; the method is characterized in that: the welding method of the truss layer corner post comprises the following steps:
step 1, welding a box forging piece (1) with a box end head (2) respectively, wherein an assembly gap at the joint of the box end head (2) and the box forging piece (1) is 10mm, a backing plate with a single-sided groove formed on the back surface of the box forging piece (1) and with a PL6 x 30 is additionally arranged for welding, the groove angle is 28 degrees, preheating is carried out on the welding position before welding, the preheating temperature is 120 ℃, and the preheating is carried out by adopting an electric heating method;
step 2, erecting a jig frame according to the assembly inclination of the box forging (1) and the bracket (3) and the requirement of a design drawing, wherein the inclination of the top end of the jig frame for supporting the plate of the bracket (3) is consistent with the inclination of the bracket (3),
step 2.1, numbering the bracket (3) into a bracket No. 1, a bracket No. 2, a bracket No. 3 and a bracket No. 4 according to the upper, middle and lower three sequences respectively;
step 2.2, assembling the upper bracket No. 1, the lower bracket No. 4 and the bulge position of the forging piece, wherein the assembly gap is 10mm, the groove form is a double V groove, the angle is 28 degrees,
2.3, before assembly, arranging baffle plates (5) on the bracket No. 1 and the bracket No. 4 respectively, wherein the baffle plates (5) are used for fixing the bracket No. 1 and the bracket No. 4 on the jig frame to prevent the bracket from sliding, preheating treatment is needed to be carried out on the welding position before welding, the preheating temperature is 120 ℃, and the preheating is carried out by adopting an electric heating method;
step 3, assembling the bracket No. 2 and the bracket No. 3 with the other two surfaces of the box forging (1), wherein the assembly gap is 10mm, the bevel is a single V bevel, the angle is 28 degrees, the welding position is required to be preheated before welding, the preheating temperature is 120 ℃, and the preheating and the welding are performed by adopting an electric heating method;
and 4, annealing the welding seam between the box body end (2) and the bracket (3) and the box forging (1).
2. The welding method of truss layer corner post according to claim 1, wherein: the annealing treatment in the step 4 is used for eliminating welding stress, and the specific steps comprise:
step 4.1, freely heating the temperature of the weld joint stress relief area before reaching 400 ℃;
step 4.2, when the temperature is increased between 400 ℃ and 560 ℃, the heating rate Vs=55 ℃/h per hour;
step 4.3, when the temperature reaches 560 ℃, preserving heat for 2.5 hours, wherein the temperature difference between any two points in a heating area in the heat preservation period is not more than 85 ℃;
step 4.4, controlling the atmosphere of the heating zone during the heating and heat preservation period to prevent the surface of the weldment from being excessively oxidized;
step 4.5, when the temperature of the weld joint stress relief area is reduced between 400 and 560 ℃, the cooling rate vj=65 ℃/h per hour;
step 4.6, stopping heating when the temperature is reduced to 400 ℃, and performing air cooling;
and 4.7, carrying out heat preservation on the heat treatment area by using heat preservation cotton, and reducing the temperature gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210113929.XA CN114515917B (en) | 2022-01-30 | 2022-01-30 | Welding method for truss layer corner column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210113929.XA CN114515917B (en) | 2022-01-30 | 2022-01-30 | Welding method for truss layer corner column |
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| CN114515917A CN114515917A (en) | 2022-05-20 |
| CN114515917B true CN114515917B (en) | 2023-10-27 |
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| CN115434420A (en) * | 2022-09-30 | 2022-12-06 | 中冶(上海)钢结构科技有限公司 | Large-scale complicated solid core forging node of heavy truss of superelevation layer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951853A (en) * | 2018-05-31 | 2018-12-07 | 中建钢构江苏有限公司 | A kind of superthick variable cross-section multi-angle complex truss node production method |
| CN110439107A (en) * | 2019-07-31 | 2019-11-12 | 中冶(上海)钢结构科技有限公司 | A kind of space tube truss ground stereoscopic assembling method |
| CN111663429A (en) * | 2020-05-16 | 2020-09-15 | 中建钢构江苏有限公司 | Manufacturing method of butterfly-shaped connecting node component |
| WO2021004187A1 (en) * | 2019-07-10 | 2021-01-14 | 中建科工集团有限公司 | Double-curved arc-shaped large-span steel truss and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195860B (en) * | 2015-09-17 | 2018-09-07 | 中建钢构有限公司 | Welding method is tiltedly found in back docking |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951853A (en) * | 2018-05-31 | 2018-12-07 | 中建钢构江苏有限公司 | A kind of superthick variable cross-section multi-angle complex truss node production method |
| WO2021004187A1 (en) * | 2019-07-10 | 2021-01-14 | 中建科工集团有限公司 | Double-curved arc-shaped large-span steel truss and manufacturing method thereof |
| CN110439107A (en) * | 2019-07-31 | 2019-11-12 | 中冶(上海)钢结构科技有限公司 | A kind of space tube truss ground stereoscopic assembling method |
| CN111663429A (en) * | 2020-05-16 | 2020-09-15 | 中建钢构江苏有限公司 | Manufacturing method of butterfly-shaped connecting node component |
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