CN112959008A - Manufacturing process of angle steel lattice component - Google Patents
Manufacturing process of angle steel lattice component Download PDFInfo
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- CN112959008A CN112959008A CN202110168565.0A CN202110168565A CN112959008A CN 112959008 A CN112959008 A CN 112959008A CN 202110168565 A CN202110168565 A CN 202110168565A CN 112959008 A CN112959008 A CN 112959008A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 53
- 239000010959 steel Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 claims abstract description 84
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000005422 blasting Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002932 luster Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 229910000746 Structural steel Inorganic materials 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 239000010953 base metal Substances 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 2
- 239000004594 Masterbatch (MB) Substances 0.000 abstract 1
- 238000009435 building construction Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention belongs to the field of processing of angle steel lattice components of circular two-dimensional steel towers, and particularly relates to a manufacturing process of an angle steel lattice component. The process comprises the following steps: the process comprises the steps of master batch cutting, groove processing, pre-coating, plate surface welding, positioning marking, lattice component assembling and the like, wherein the shape and the specification of a rigid lattice component are processed according to the design specification of the steel tower to be built by the process, so that the engineering quantity of on-site building construction is reduced, and the overall quality of the steel tower is greatly improved; the base metal is pretreated and beveled before welding, and the welding strength is enhanced by the measure of arranging the reinforcing holes on the batten strip during welding; and marking the assembled positions when the chords are spliced into the panels, wherein the use periods of the marks are from the machining start of the steel lattice members to the end of the construction.
Description
Technical Field
The invention belongs to the field of processing of angle steel lattice components of circular two-dimensional steel towers, and particularly relates to a manufacturing process of an angle steel lattice component.
Background
In recent years, compared with a brick-concrete structure building, the steel structure building has obvious advantages in the aspects of environmental protection, energy conservation, high efficiency, industrial production and the like.
In the production of thermal power plant, the hyperbola cooling tower, cylindricality cooling tower use steel lattice component to replace the concrete building gradually, and chinese utility model CN201620075618.9 discloses a hyperbola four-pipe lattice diagonal net steel construction cooling tower, in the construction, regards a lattice component as the crossbeam, and two other steel lattice components splice as the batter post for triangle-shaped concatenation unit, and the cylinder is pieced together to these concatenation units of reuse. Therefore, when the angle steel lattice member is processed, the shape of the angle steel lattice member needs to be determined according to the radius size of the steel tower, for example, the length difference between the angle steel positioned on the inner side and the angle steel positioned on the outer side, and the angle of the connecting point of the two angle steels serving as the batter post needs to be formed to finally form a circle, and the fine shape optimization of the angle steel lattice members can improve the building quality of the steel tower.
Disclosure of Invention
The invention provides a special processing technology of an angle steel lattice member applied to a round steel tower, aiming at the construction of the round angle steel lattice tower. The invention is realized by the following technical scheme: a manufacturing process of an angle steel lattice component comprises the following steps:
a1: cutting the chord, the batten and the plate, reserving 30mm of allowance when cutting the chord, and reserving 5-10 mm of allowance for the plate; the plate is pentagonal, two parallel edges are parallel to each other, one end of each of the two parallel edges is connected by one edge, and the other end of each of the two parallel edges is connected by two edges which form an angle with each other;
a2: processing a batten groove and a truncated edge, wherein the groove angle alpha + delta alpha is 30-45 degrees, delta alpha is not larger than +/-2.5 degrees, and the thickness p + delta p of the truncated edge is 1-2 mm; δ p = ± 1 mm;
a3: pre-coating, namely performing shot blasting rust removal on the chord members, the batten strips and the plates which are treated in the step A1 and the step A2, and pre-coating a weldable primer, wherein the thickness of the primer is 15-25 mu m;
b1: assembling and welding the plate surface, namely using the chords, the lacing bars and the plates processed in the step A3, placing the two chords in parallel, placing the two plates at two ends of the two chords, connecting the two chords, arranging a plurality of lacing bars between the two chords, fixedly connecting two chords at two ends of the lacing bars, arranging reinforcing holes at two ends of the lacing bars, and enabling inner diameter surfaces of the reinforcing holes to be sawtooth surfaces;
b2: marking, namely marking the assembly welding position of the plate surface welded in the step B1, and respectively marking the end points of the two chord members and the top point of the plate, wherein the top point is the top point formed by the two mutually angled edges in the step A1;
c1: assembling the grid members, namely using the plate surfaces welded in the step B2, relatively fixing the plate surfaces on an assembling table according to the assembling and welding position marks, and welding by using connecting angle steels;
d1: and C, end processing, namely integrally cutting the end points of the two chord members and the top point of the plate according to the calibration in the step B2, and processing an end face groove to finish the processing of the angle steel lattice component.
Further, step B1 is welding on a welding platform, on which a reference line and an equidistant line having a predetermined distance from the reference line are arranged; positioning blocks are arranged on the welding platform, the positions of the two chord members are fixed, and corresponding equidistant lines are drawn on the chord members;
elevation positioning devices are arranged at two ends of the welding platform and used for fixing the heights of two ends of the two chord members;
after the fixing is finished, welding two ends of the two chord members by using a plate, wherein the two parallel edges of the plate are respectively welded with the two chord members; the plate is marked with an assembly welding position mark;
and finally, assembling the batten strip, wherein a limiting block for limiting the position of the batten strip is arranged on the welding platform.
Further, a positioning upright post for fixing the panel is arranged on the assembling table in the step C1, and a lattice-shaped adjusting bolt is arranged on the positioning upright post;
aligning the equidistant lines on the panel, fixing the equidistant lines on the positioning upright posts according to the mark of the assembly welding position, and welding by using connecting angle steel; the connecting node is provided with a reinforcing hole;
four chords forming the two panels are welded into a steel lattice through plane connection and space diagonal connection combination.
Further, before welding, oxide skin, moisture, oil stain, iron rust and burrs at the welding part and in the range of 50 mm-80 mm nearby the welding part are removed, and metal luster is exposed.
Further, arc striking plates made of the same material as the base metal are arranged at the arc striking end and the arc extinguishing end of the butt welding, the groove shape and the thickness of the arc striking plates are the same as those of a component, and the length of each arc striking plate is as follows: the thickness of the manual arc welding and the gas shielded welding is 80mm x 100mm when the thickness is more than 20mm, and is 50mm x 80mm when the thickness is less than or equal to 20 mm; semi-automatic welding and automatic submerged arc welding are 100mm 150 mm.
Furthermore, after the positioning welding is finished, the welding seam has no cracks, air holes and slag inclusion, and the size of the positioning welding is 4-8 mm.
Further, the ambient wind speed is not higher than 2m/S in CO2 gas shielded welding, and the ambient wind speed is not higher than 9m/S in other welding methods.
Further, after the step A3 is finished, the steel is corrected by mechanical equipment at normal temperature, and the corrected surface has no dent and dent damage; the heating temperature during thermal correction is controlled below 900 ℃; the temperature of blue brittle zone is avoided during correction.
The invention has the beneficial effects that: by the process, the shape and the specification of the rigid lattice component are processed according to the design specification of the steel tower to be built, so that the engineering quantity of on-site construction is reduced, and the overall quality of the steel tower is greatly improved; the base metal is pretreated and beveled before welding, and the welding strength is enhanced by the measure of arranging the reinforcing holes on the batten strip during welding; and marking the assembled positions when the chords are spliced into the panels, wherein the use periods of the marks are from the machining start of the steel lattice members to the end of the construction.
Drawings
FIG. 1 is a schematic diagram of groove preparation in an embodiment of the present invention;
FIG. 2 is a schematic view of a panel weld in an embodiment of the present invention;
FIG. 3 is a schematic view of the connection between the chord and the lacing bar according to the embodiment of the present invention;
FIG. 4 is a schematic view of a lattice assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view of a lattice member in an embodiment of the invention.
Detailed Description
As shown in fig. 1-4: a manufacturing process of an angle steel lattice component comprises the following steps:
a1: cutting the chord, the batten and the plate, reserving 30mm of allowance when cutting the chord, and reserving 5-10 mm of allowance for the plate; the plate is pentagonal, two parallel edges are parallel to each other, one end of each of the two parallel edges is connected by one edge, and the other end of each of the two parallel edges is connected by two edges which form an angle with each other;
a2: processing a lacing groove and a truncated edge, wherein the groove angle alpha + delta alpha is 45 degrees, delta alpha is not larger than +/-2.5 degrees, and the thickness p + delta p of the truncated edge is 2 mm; δ p = ± 1 mm;
a3: pre-coating, namely performing shot blasting rust removal on the chord members, the batten strips and the plates which are treated in the step A1 and the step A2, and pre-coating a weldable primer, wherein the thickness of the primer is 15-25 mu m;
b1: assembling and welding the plate surface, namely using the chords, the lacing bars and the plates processed in the step A3, placing the two chords in parallel, placing the two plates at two ends of the two chords, connecting the two chords, arranging a plurality of lacing bars between the two chords, fixedly connecting two chords at two ends of the lacing bars, arranging reinforcing holes at two ends of the lacing bars, and enabling inner diameter surfaces of the reinforcing holes to be sawtooth surfaces;
the welding process is completed on a welding platform, and a reference line and a one-meter line which is away from the reference line by a preset distance are arranged on the welding platform; a positioning block is arranged on the welding platform, the positions of the two chord members are fixed, and a corresponding one-meter line is drawn on the chord members;
elevation positioning devices are arranged at two ends of the welding platform and used for fixing the heights of two ends of the two chord members;
after the fixing is finished, welding two ends of the two chord members by using a plate, wherein the two parallel edges of the plate are respectively welded with the two chord members; the plate is marked with an assembly welding position mark;
and finally, assembling the batten strip, wherein a limiting block for limiting the position of the batten strip is arranged on the welding platform.
B2: marking, namely marking the assembly welding position of the plate surface welded in the step B1, and respectively marking the end points of the two chord members and the top point of the plate, wherein the top point is the top point formed by the two mutually angled edges in the step A1; determining the distance sizes between the Y1 point and the Y2 point, and between the Y5 point and the Y6 point and the reference point according to the drawing size; and (3) determining the elevation sizes of Y1, Y2, Y3, Y4, Y5, Y6, Y7 and Y8, determining the point positions of the first, second, third and fourth, and marking. Printing assembled one-meter-line mark points on the one-meter-line position by using a sample punch, and respectively printing upper-end TE marks and lower-end BE marks on connecting plates at the upper end and the lower end; the sheet material IS marked with an inner side IS and an outer side OS.
C1: assembling the grid members, namely using the plate surfaces welded in the step B2, relatively fixing the plate surfaces on an assembling table according to the assembling and welding position marks, and welding by using connecting angle steels;
a positioning upright post for fixing the panel is arranged on the assembling table, and a lattice-shaped adjusting bolt for manufacturing the lattice-shaped adjusting bolt is arranged on the positioning upright post;
aligning a one-meter line on the panel, fixing the panel on the positioning upright post according to the assembly welding position mark, and welding by using connecting angle steel; the connecting node is provided with a reinforcing hole;
four chords forming the two panels are welded into a steel lattice through plane connection and space diagonal connection combination.
D1: and C, end processing, namely integrally cutting the end points of the two chord members and the top point of the plate according to the calibration in the step B2, and processing an end face groove to finish the processing of the angle steel lattice component.
Before welding, oxide skin, moisture, oil stain, rust and burrs at the welding part and in the range of 50 mm-80 mm nearby are removed, and the metallic luster is exposed.
Installing arc striking plates made of the same material as the base metal at the arc striking end and the arc extinguishing end of the butt welding, wherein the groove shape and the thickness of the arc striking plates are the same as the components, and the length of the arc striking plates is as follows: the thickness of the manual arc welding and the gas shielded welding is 80mm x 100mm when the thickness is more than 20mm, and is 50mm x 80mm when the thickness is less than or equal to 20 mm; semi-automatic welding and automatic submerged arc welding are 100mm 150 mm.
After the positioning welding is finished, the welding seam has no cracks, air holes and slag inclusion, and the size of the positioning welding is 4-8 mm.
And in CO2 gas shielded welding, the ambient wind speed is not higher than 2m/S, and in other welding methods, the ambient wind speed is not higher than 9 m/S.
After the step A3 is finished, correcting the steel by using mechanical equipment at normal temperature, wherein the corrected surface has no dent and dent damage; the heating temperature during thermal correction is controlled below 900 ℃; the temperature of blue brittle zone is avoided during correction.
Claims (8)
1. The manufacturing process of the angle steel lattice component is characterized by comprising the following steps of:
a1: cutting the chord, the batten and the plate, wherein a margin of 30mm is reserved during cutting of the chord, and a margin of 5-10 mm is reserved for the plate; the plate is pentagonal, two parallel edges are parallel to each other, one end of each of the two parallel edges is connected by one edge, and the other end of each of the two parallel edges is connected by two edges which form an angle with each other;
a2: strip beveling and truncated edge processing are carried out, wherein the bevel angle alpha + delta alpha is 30-45 degrees, delta alpha is = +/-2.5 degrees, and the truncated edge thickness p + delta p is 1-2 mm; δ p = ± 1 mm;
a3: pre-coating, namely performing shot blasting rust removal on the chord members, the batten strips and the plates which are treated in the step A1 and the step A2, and pre-coating a weldable primer, wherein the thickness of the primer is 15-25 mu m;
b1: assembling and welding the plate surface, namely, using the chords, the lacing bars and the plates processed in the step A3, placing two chords in parallel, placing the plates on two sides of the two chords, connecting the two chords, arranging a plurality of lacing bars between the two chords, fixedly connecting the two chords at two ends of the lacing bars, arranging reinforcing holes at two ends of the lacing bars, and forming sawtooth surfaces on inner diameter surfaces of the reinforcing holes;
b2: marking, namely marking the assembly welding position of the plate surface welded in the step B1, and respectively marking the end points of the two chords and the top point of the plate, wherein the top point is the top point of the angle formed by the two mutually angled edges in the step A1;
c1: assembling grid members, namely using the plate surfaces welded in the step B2, relatively fixing the plate surfaces on an assembling table according to the assembling and welding position marks, and welding by using connecting angle steels;
d1: and C, end processing, namely integrally cutting the end points of the two chord members and the top point of the plate, which are calibrated in the step B2, and processing an end face groove to finish the processing of the angle steel lattice component.
2. The process for manufacturing an angle steel lattice as claimed in claim 1, wherein the step B1 is welding on a welding platform, the welding platform being provided with a reference line and an equidistant line spaced a predetermined distance from the reference line; the welding platform is provided with a positioning block for fixing the positions of the two chord members and drawing corresponding equidistant lines on the chord members;
elevation positioning devices are arranged at two ends of the welding platform and used for fixing the heights of two ends of the two chords;
after the fixing is finished, welding two ends of the two chord members by using the plate, wherein the two parallel edges of the plate are respectively welded with the two chord members; the plate is marked with an assembly welding position mark;
and finally, assembling the batten strip, wherein a limiting block for limiting the position of the batten strip is arranged on the welding platform.
3. The process for manufacturing an angle steel lattice as claimed in claim 2, wherein the assembling table in the step C1 is provided with a positioning column for fixing the panel, and the positioning column is provided with an adjusting bolt for manufacturing the lattice shape;
aligning the equidistant lines on the panels, fixing the equidistant lines on the positioning upright posts according to the marks of the assembly welding positions, and welding by using connecting angle steels; the connecting node is provided with a reinforcing hole;
four chords forming the two panels are welded into a steel lattice through plane connection and space diagonal connection combination.
4. The process for manufacturing an angle iron lattice according to claim 1, wherein oxide skin, moisture, oil, rust and burrs at a welded part and in the vicinity thereof within a range of 50mm to 80mm are removed before welding, and metallic luster is exposed.
5. The process for manufacturing an angle steel lattice component according to claim 1, wherein an arc starting plate made of the same material as the base material is installed at the arc starting end and the arc quenching end of the butt welding, the groove shape and thickness of the arc starting plate are the same as those of the component, and the length of the arc starting plate is as follows: the thickness of the manual arc welding and the gas shielded welding is 80mm x 100mm when the thickness is more than 20mm, and is 50mm x 80mm when the thickness is less than or equal to 20 mm; semi-automatic welding and automatic submerged arc welding are 100mm 150 mm.
6. The manufacturing process of the angle steel lattice component as claimed in claim 1, wherein after the tack welding is completed, no cracks, pores or slag are formed in a welding line, and the tack welding size is 4 mm-8 mm.
7. The process for manufacturing the angle steel lattice component as claimed in claim 1, wherein the ambient wind speed is not higher than 2m/S by CO2 gas shielded welding, and the ambient wind speed is not higher than 9m/S by other welding methods.
8. The process for manufacturing an angle steel lattice according to claim 1, wherein after the step a3 is completed, the steel material is straightened by mechanical equipment at normal temperature, and the straightened surface has no dent or dent damage; the heating temperature during thermal correction is controlled below 900 ℃; the temperature of blue brittle zone is avoided during correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168565.0A CN112959008A (en) | 2021-02-07 | 2021-02-07 | Manufacturing process of angle steel lattice component |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110168565.0A CN112959008A (en) | 2021-02-07 | 2021-02-07 | Manufacturing process of angle steel lattice component |
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| CN112959008A true CN112959008A (en) | 2021-06-15 |
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| CN109779102A (en) * | 2019-03-04 | 2019-05-21 | 中国五冶集团有限公司 | Lattice keel expanded metal lath mould composite wall and its construction method |
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2021
- 2021-02-07 CN CN202110168565.0A patent/CN112959008A/en active Pending
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| JP2001241102A (en) * | 2000-02-28 | 2001-09-04 | Tomoe Corp | Connecting part structure for box type cross sectional column to connect to steel column and beam |
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| CN208803755U (en) * | 2018-08-01 | 2019-04-30 | 陕西能源麟北发电有限公司 | A kind of latticed steel structure indirect cool tower structure |
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| CN109454405A (en) * | 2018-09-12 | 2019-03-12 | 安徽建筑大学 | Processing and manufacturing process of ultra-long and ultra-wide lattice column |
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Application publication date: 20210615 |