CN109079397B - Large-scale stainless steel welding H shaped steel assembly welding positioner - Google Patents
Large-scale stainless steel welding H shaped steel assembly welding positioner Download PDFInfo
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- CN109079397B CN109079397B CN201811203539.1A CN201811203539A CN109079397B CN 109079397 B CN109079397 B CN 109079397B CN 201811203539 A CN201811203539 A CN 201811203539A CN 109079397 B CN109079397 B CN 109079397B
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- 238000003466 welding Methods 0.000 title claims abstract description 205
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 99
- 239000010959 steel Substances 0.000 title claims abstract description 99
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 17
- 239000010935 stainless steel Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims description 26
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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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
- 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
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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Abstract
The invention discloses a large stainless steel welding H-shaped steel assembly welding positioning device which comprises a positioning frame (1) and a locking piece (2), wherein the positioning frame (1) is used for assembling steel plates of H-shaped steel, and the locking piece (2) is rotatably connected to the positioning frame (1) through a rotating shaft (3) so that the assembled steel plates are fixed in position. The welding device disclosed by the invention is ingenious in design, easy to operate, strong in universality, high in welding quality and efficiency and small in welding difficulty.
Description
Technical Field
The invention relates to the field of nuclear power, in particular to manufacturing of large-scale welding H-shaped steel in a nuclear power island equipment waste heat discharge heat exchanger, and particularly relates to a large-scale stainless steel welding H-shaped steel assembly welding positioning device.
Background
H-shaped steel is widely applied to factory building construction, high-rise buildings, bridge construction and other large-scale steel structures, and large-scale stainless steel H-shaped steel is often used in product structures with harsh conditions and severe environment working conditions. For example: the waste heat discharging heat exchanger of nuclear island equipment of the nuclear power station is soaked in cooling water under a containment throughout the year, and the whole equipment is composed of a stainless steel H-shaped steel frame with the specification of 280mm multiplied by 280mm and a heat exchange tube bundle part, and plays an important role in discharging the waste heat of the nuclear reactor. The large stainless steel H-shaped steel has large wall thickness, strict external dimension requirements, large rolling forming difficulty and high manufacturing cost.
Aiming at the problems, the method for preparing the H-shaped steel by welding is usually adopted in the prior art, and the method is mainly obtained by processing and forming the external contour after assembling and welding three sections of steel plates. However, the requirements of the large-scale welding H-shaped steel on welding quality and post-welding forming size are high, and the following problems exist in the practical application process:
(1) The welding seam of the large-scale welding H-shaped steel is longer, in order to ensure the quality of the H-shaped steel, the welding seam at the butt joint of the steel plates needs to be completely welded, and the welding seam meets the requirements of higher nondestructive inspection grade, but the welding quantity is larger, but due to the characteristics of high linear expansion coefficient, large resistivity and low thermal conductivity of the stainless steel, the welding seam is easy to deform after cooling, and the perpendicularity and the position degree between the welded H-shaped steel plates are difficult to control in a required range;
(2) The welding adopts a flat welding position, the H-shaped steel needs to be repeatedly turned over, the deformation of the H-shaped steel is easy to be caused in the processes of hanging and turning over and free welding, and the welding seam is required to be repeatedly corrected.
Therefore, the problem to be solved at present is to design a large-scale stainless steel welding H-shaped steel assembly welding positioning device, so that the perpendicularity and the position degree between steel plates in the welding process are kept unchanged, and the welding precision is high.
Disclosure of Invention
In order to overcome the problems, the inventor has conducted intensive studies and devised a large-scale stainless steel welding H-shaped steel assembly welding positioning device which comprises a positioning frame for assembling H-shaped steel plates and a locking piece for fixing the positions of the assembled steel plates, so that all parts of the H-shaped steel plates can be accurately assembled and can meet the welding shrinkage of the welded H-shaped steel, and the welding precision and the welding efficiency are improved, thereby completing the invention.
In particular, it is an object of the present invention to provide the following aspects:
in a first aspect, a large stainless steel welding H-shaped steel assembly welding positioning device is provided, wherein the device comprises a positioning frame 1 and a locking piece 2, the positioning frame 1 is used for assembling steel plates of H-shaped steel,
The locking piece 2 is rotatably connected to the positioning frame 1 through a rotating shaft 3, so that the positions of the steel plates in the group are fixed.
In a second aspect, there is provided a welding method for welding H-section steel with large stainless steel, preferably using the assembly welding positioning device of the first aspect, wherein the method comprises the steps of:
Step 1, installing and adjusting a welding positioning device;
Step 2, installing a steel plate of the welded H-shaped steel, and accurately assembling a wing plate and a web plate on one side of the steel plate;
step 3, installing the supporting piece 5, hoisting and welding;
and 4, after welding, loosening the assembly, performing accurate assembly of the other side wing plate and the web plate, and after installing the supporting piece, performing welding to finish welding of the H-shaped steel.
The invention has the beneficial effects that:
(1) The assembly welding positioning device provided by the invention has the advantages of novel structure, ingenious design, easiness in operation, strong universality and high welding quality;
(2) The assembly welding positioning device provided by the invention can realize the accurate positioning of the web plate and the wing plate of the welding H-shaped steel, can rigidly fix the assembled steel plates and can prevent the change of the angles of the web plate and the wing plate caused by welding deformation in the welding process;
(3) According to the assembly welding positioning device provided by the invention, the locking piece and the positioning plate jointly act, so that the lower surface of the web plate is in sliding contact with the positioning plate, the upper surface of the web plate is in rolling contact with the locking piece, and the web plate can only move along the welding shrinkage direction during welding without affecting the perpendicularity of the wing plate and the web plate;
(4) According to the assembly welding positioning device provided by the invention, the supporting piece is arranged outside the locking piece, and the inner concave structure of the supporting piece is matched with the outer contour of the positioning frame, so that the supporting piece can be fixedly connected to the outside of the assembly welding positioning device, the position of a steel plate of H-shaped steel is fixed in the rotation process, and welding deformation is prevented;
(5) According to the assembly welding positioning device provided by the invention, the outer contour of the supporting piece is circular, and when in welding, the whole device is arranged on the roller frame, so that the assembly welding positioning device is easy to rotate to realize alternate welding of flat welding positions, saves time and labor, and reduces the manufacturing difficulty.
Drawings
FIG. 1 is a schematic view of a structure and welding of the welded H-section steel of the present invention;
FIG. 2 is a schematic diagram showing the overall structure of the assembly welding positioning device according to the present invention;
FIG. 3 is a schematic view showing the overall structure of the positioning frame according to the present invention;
FIG. 4 shows a side view of the positioning frame of the present invention;
FIG. 5 shows a schematic structural view of the locking member of the present invention;
FIG. 6 shows a schematic diagram of the invention for welding H-shaped steel in a positioning frame with the positioning direction adjusted and the flat welding position adjusted;
Fig. 7 shows a schematic structural diagram of the assembly welding positioning device in the invention during welding. Reference numerals illustrate:
1-a positioning frame;
11-positioning plates;
12-ejector rod;
13-side bars;
14-a bottom bar;
15-a first adjustment member;
16-a second adjustment member;
17-shaft ears;
18-grooves;
2-locking members;
A 21-V-shaped side plate;
22-a roller;
23-a fixed shaft;
3-a rotation axis;
4-fixing pieces;
5-a support;
100-web plate;
200-wing plates;
alpha-groove angle;
A-welding gap;
The distance between the B-wing plates;
PA-solder leveling.
Detailed Description
The invention is described in further detail below with reference to the drawings and the embodiments. The features and advantages of the present invention will become more apparent from the description. Wherein, although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The welded H-shaped steel disclosed by the invention, as shown in fig. 1, comprises a web 100 and wing plates 200, wherein before welding, the wing plates are processed and molded and then assembled with the web, the welding position is two X-shaped grooves, the angle alpha of each groove is 60 degrees, the welding gap A of each groove is 3-4 mm, the distance between the wing plates is B, and the perpendicularity between the web and the wing plates of the welded H-shaped steel is 1.5mm.
The inventor researches that the X-shaped groove needs to be welded on two sides of a welding line, and aims to: (i) One side can be back-gouged from the other side after being welded with the back cover, so that the welding quality of the root of the welding seam is ensured; (ii) Welding shrinkage can be generated on the welding side during welding, so that internal stress is generated on the welding line between the web plate 100 and the wing plate 200, deformation can be generated when the stress is overlarge, the angle between the web plate and the wing plate is reduced, even plastic deformation is generated, and the welding stress on the two sides of the welding line can be balanced through two-side split alternating welding, so that the welding deformation is well controlled.
The inventors also found that the welding gap of the groove shrinks to 0mm after welding and cooling, so in order to ensure the welding quality and the external dimension of the H-shaped steel after welding, the welding gap should be adjusted when the web plate is in butt joint with the wing plate, namely the welding gap A of the wing plate and the web plate is allowed to shrink freely during assembly welding, but the angle of the wing plate and the web plate is not allowed to change.
Therefore, the assembly welding positioning device is preferably adopted in the invention to accurately assemble and rigidly fix the steel plates (i.e. the web plates and the wing plates) of the welded H-shaped steel.
The invention provides a large-scale stainless steel welding H-shaped steel assembly welding positioning device, which is shown in figure 2, and comprises a positioning frame 1 and a locking piece 2, wherein the positioning frame 1 is used for assembling steel plates of H-shaped steel,
The locking piece 2 is rotatably connected to the positioning frame 1 through a rotating shaft 3, so that the positions of the steel plates in the group are fixed.
According to a preferred embodiment of the present invention, as shown in fig. 3, the positioning frame 1 is an adjustable welded steel frame body.
In a further preferred embodiment, the positioning frame 1 has a rectangular parallelepiped structure.
In a further preferred embodiment, the positioning frame 1 includes a top rod 12 and a bottom rod 14, where the top rod 12 and the bottom rod 14 are disposed in parallel, and each includes two.
The ejector rod 12 is two long sides of the upper surface of the cuboid, the bottom rod 14 is two long sides of the lower surface of the cuboid, and the length of the two long sides can be determined according to the length of the H-shaped steel actually required.
In the invention, the upper surface and the lower surface of the cuboid are parallel to the web plate when H-shaped steel is welded, the upper surface is positioned above the web plate, and the lower surface is positioned below the web plate.
According to a preferred embodiment of the present invention, a plurality of side bars 13 are uniformly provided between the top bar 12 and the bottom bar 14, and the side bars 13 are provided outside the top bar 12 and the bottom bar 14.
In a further preferred embodiment, the side bars 13 are evenly distributed on both sides of the top bar 12 and bottom bar 14, preferably the number of side bars distributed on each side is the same.
The side rods are uniformly distributed on the outer sides of the two side surfaces.
In a still further preferred embodiment, the side bars 13 are perpendicular to both the top bar 12 and the bottom bar 14.
According to a preferred embodiment of the invention, a plurality of shaft lugs 17 are provided on the outer side of one of the carrier rods 12, said shaft lugs 17 being provided in a plurality on the upper side of the same side rod 13.
In a further preferred embodiment, a recess 18 is provided in the other carrier rod 12, said recess 18 being provided in the upper part of the same side rod 13 in correspondence with the position of the axle lug 17.
According to a preferred embodiment of the present invention, as shown in fig. 3, a plurality of positioning plates 11 for positioning and welding positions of the H-steel plates are further provided inside the positioning frame 1.
In a further preferred embodiment, the positioning plate 11 is fixed to two bottom rods 14 by a cross beam, and the plate surface of the positioning plate 11 is perpendicular to the bottom rods 14.
In a further preferred embodiment, the positioning plate 11 has a plurality of positioning plates uniformly arranged inside the positioning frame 1,
Preferably, the positioning plate 11 is cooperatively arranged at a position close to the side bar 13.
More preferably, the distance between the adjacent positioning plates 11 is 0.8 to 1.0m.
Wherein, the cross beam of the locating plate 11 is abutted with the side edge of the side rod 13.
According to a preferred embodiment of the present invention, as shown in fig. 3 and 4, the top surface of the positioning plate 11 is in contact with the web 100 of the welded H-section steel to position the web;
the side of the positioning plate 11 contacts with the wing plate 200 welded with the H-shaped steel to position the wing plate.
In a further preferred embodiment, the top surfaces of the plurality of positioning plates 11 are all in the same horizontal plane, parallel to the plane in which the two bottom rods 14 lie, and/or
The side surfaces of the positioning plates 11 on the same side are the same in distance from the bottom rods close to each other.
In a further preferred embodiment, as shown in fig. 4, the length L of the positioning plate 11 is smaller than the distance B between the two flanges of the welded H-section steel.
In the invention, during welding, the wing plate on one side is welded and fixed with the web plate, and then the wing plate on the other side is welded, so that the length L of the positioning plate is set to be smaller than the distance between the two wing plates, thereby being beneficial to adjusting the welding gap between the web plate and the wing plate.
According to a preferred embodiment of the invention, a first adjusting element 15 is also provided on the bottom bar 14 for adjusting the vertical height of the welded H-profile wing panels.
According to the invention, the bottom surface of the welding H-shaped steel wing plate is abutted against the first adjusting piece 15, and the wing plate moves in the vertical direction by adjusting the vertical height of the first adjusting piece 15, so that the welding position of the wing plate is accurately abutted against the welding position of the web plate.
In a further preferred embodiment, the first adjusting member 15 has a plurality of adjusting members, which are uniformly arranged on the bottom bar 14, so that the wing plates can be uniformly stressed.
In a still further preferred embodiment, the first adjustment member 15 is a jackscrew.
According to a preferred embodiment of the invention, a second adjustment member 16 is also provided on the side bar 13 to secure the wing to the side of the positioning plate 11.
In a further preferred embodiment, the second adjusting member 16 has a plurality of, preferably 2, side bars, one of which abuts against the middle of the wing plate and the other of which abuts against the lower end of the wing plate, so that the wing plate is uniformly stressed.
In a still further preferred embodiment, the second adjustment member 16 is a jackscrew.
In the invention, 2 first adjusting parts and 2 second adjusting parts are preferably arranged at the position of each positioning plate in a matching way, so that wing plates at two sides of the welded H-shaped steel are uniformly stressed in the welding process, the inner sides of the wing plates are tightly contacted with the side surfaces of the positioning plates, and the positions of the wing plates are fixed.
According to a preferred embodiment of the present invention, as shown in fig. 1 and 5, one end of the locking member 2 is fixed to the shaft lug 17 through the rotation shaft 3,
The other end is detachably fixed in the groove 18 by the fixing member 4.
Wherein the fixing piece is rotatably connected to the locking piece, and the fixing piece is preferably a screw and a nut which are matched.
In a further preferred embodiment, the locking element 2 has a plurality, preferably the same number as the number of positioning plates.
In a further preferred embodiment, the locking member 2 is arranged above the locating plate, and the locking member and the locating plate are matched and fixedly welded with the web plate of the H-shaped steel.
According to a preferred embodiment of the invention, the locking element 2 comprises a V-shaped plate 21, the bottom end of which is of a straight configuration, parallel to the upper surface of the web of the welded H-section.
Wherein the V-shaped plate 21 has two layers.
In a further preferred embodiment, the locking member 2 further comprises a roller 22, said roller 22 being arranged at the flat bottom end of the V-shaped plate such that the locking member is in rolling contact with the web of the welded H-section steel.
In a still further preferred embodiment, the roller 22 is arranged at the flat bottom end of the V-shaped plate by means of a fixed shaft 23.
Preferably, the fixed shaft 23 is provided between two layers of the V-shaped plate 21.
Wherein the fixing member 4 is also fixed to the locking member by a fixing shaft 23.
The inventor researches and discovers that when the locking piece is fixedly connected with the positioning frame and clamps the web plate, the bottom surface of the web plate is in sliding contact with the positioning plate, the top surface of the web plate is in sliding contact with the roller, and the welding shrinkage stress of the web plate and the wing plate is far greater than the friction force of the web plate, the positioning plate and the locking pressing block during welding, so that the assembly welding positioning device can not only meet the free shrinkage of a welding line, but also control the welding deformation of the web plate and the wing plate, and simultaneously improve the rigidity.
In the invention, the welding H-shaped steel needs to be subjected to flat welding on the whole welding seam, as shown in fig. 6, the flat welding Position (PA) refers to the welding position of the welding seam facing upwards and the welding gun facing downwards, and the welding quality can be improved by adopting the welding method. During welding, the grooves on each side can be filled up by welding for many times from one end to the other end of the welding line according to the angle and depth of the grooves and the diameter of the selected welding rod.
The preferred welding method in the present invention is: welding personnel firstly completes welding from one end of the welding line to the other end of the welding line at the position of the flat welding position, turns over the H-shaped steel for 180 degrees, and then carries out flat welding on the other side of the welding line, and the welding is repeatedly carried out.
In the welding process, in order to overcome the problems of time and labor waste and welding deformation caused by turning over the H-shaped steel, the support piece 5 is preferably arranged outside the positioning frame 1 with the H-shaped steel plate fixed, so that the H-shaped steel can be turned over stably in the welding process.
According to a preferred embodiment of the present invention, as shown in fig. 7, the supporting members 5 are provided at both ends of the positioning frame 1 so that the H-section steel can be smoothly turned over during the welding process.
In a further preferred embodiment, the support 5 is arranged outside the locking element 2, the outer contour being circular.
The inventor finds that the support piece 5 is arranged outside the locking piece 2, so that the support piece can be prevented from generating axial displacement on the outer wall of the positioning frame, and the position of welding H-shaped steel in the overturning process is further ensured to be stable.
In a further preferred embodiment, the support 5 is composed of two semi-circular members of identical structure, which are cooperatively arranged outside the positioning frame 1 to form a complete circular support.
Preferably, the support member is concave inside, and the concave shape is matched with the external shape of the positioning frame.
The invention also provides a welding method for welding the H-shaped steel by using the large stainless steel, and the assembly welding positioning device is preferably adopted, as shown in figures 1-7, and the method comprises the following steps:
and 1, installing and adjusting the assembly welding positioning device.
In the present invention, first, the top surfaces of the plurality of positioning plates 11 are all in the same horizontal plane, and the side surfaces are coplanar and the same distance from the bottom bar is measured and ensured. Then the positioning frame 1 is placed on two horizontal cushion piers, and a plurality of locking pieces 12 are fixed on the positioning frame 1 through a rotating shaft 13 to form the assembly welding positioning device.
And 2, installing and welding a steel plate of the H-shaped steel, and precisely assembling a wing plate and a web plate at one side of the steel plate.
In the invention, the web plate 100 and the wing plate 200 of H-shaped steel to be welded are placed in the positioning frame 1, one of the wing plates is precisely assembled with the web plate, and then the position of the wing plate is fixed.
Firstly, horizontally placing a web on the top surface of a positioning plate 11, and respectively placing two wing plates on two sides of the positioning plate; then, the height of the web is taken as a standard, and the first adjusting piece 15 is adjusted, so that welding grooves of the wing plates and the web are positioned at the same height, and accurate assembly is realized; and the second adjusting piece 16 is pre-tightened, so that the inner side of the wing plate is tightly attached to the side face of the positioning plate, and the position of the wing plate is fixed.
After the welding groove positions of the wing plates and the web plates are fixed, adjusting the welding gap to a preset value; the web is then fixed in position by the locking member, wherein the roller 22 of the locking member is brought into abutment against the upper surface of the web 100 and the fixing member 4 is preloaded such that the locking member 2 is fixedly connected to the positioning frame 1.
The inventors have found that the web 100 is fixed in position under the combined action of the locating plate and the locking member, one side is in sliding contact with the locating plate, and one side is in rolling contact with the roller, and during welding, the web can only move in the welding shrinkage direction under the action of welding stress, and the angle between the web and the wing plate is kept unchanged.
In the invention, after one side wing plate and the web plate are accurately aligned, the position of the other side wing plate is fixed, but accurate alignment is not performed.
And 3, installing the supporting piece, hoisting and welding.
According to the invention, according to actual welding conditions, the supporting pieces 5 are installed at the two ends of the positioning frame 1 and outside the locking piece in a buckling manner, so that the supporting pieces 5 are fixed at the outer sides of the locking piece; and then horizontally hoisting the connected device, placing the device on a roller frame, and carrying out double-side flat welding position alternate welding on welding seams of one side wing plate and a web plate which are accurately assembled.
Wherein, the supporting piece 5 is placed on the roller frame, and the positions of the double-side flat welding Positions (PA) of the welding seams of the web plate and the precisely-positioned wing plates are adjusted and alternately welded by the rotation of the roller frame as shown in fig. 7.
And 4, after welding, loosening the assembly, performing accurate assembly of the other side wing plate and the web plate, and after installing the supporting piece, performing welding to finish welding of the H-shaped steel.
After the welding is completed, the supporting piece 5, the locking piece 2 and the first adjusting piece 15 are loosened, then the other side wing plate and the welded portion are precisely assembled according to the step 2, after the supporting piece is installed, double-side flat welding position alternate welding is performed, and finally the welding of the H-shaped steel is completed.
The welding method provided by the invention realizes accurate assembly in the welding process of large-scale welding H-shaped steel, and has high welding precision and high welding speed.
Examples
Example 1
The welding device shown in fig. 1 to 7 is used for welding a large-sized stainless steel H-shaped steel with the specification of WH280×280×18×28, and comprises the following steps:
(1) Adjusting the top surfaces of the positioning plates to be in the same horizontal plane, enabling the side surfaces to be coplanar and the distance between the side surfaces and the bottom rod to be the same, placing the positioning frame on two horizontal pad piers, and fixing the locking pieces on the positioning frame through the rotating shafts to form a welding positioning device;
(2) The web plate is horizontally placed on the top surface of the positioning plate, and the two wing plates are respectively placed on two sides of the positioning plate; then, the height of the web is taken as a standard, and a first adjusting piece (jackscrew) is adjusted, so that welding grooves of the wing plates and the web are positioned at the same height; then, a second adjusting piece (jackscrew) is adjusted, so that the inner side of the wing plate is tightly attached to the side face of the positioning plate;
The welding gap between the web plate and the fixed wing plate is adjusted to be 4mm, so that the roller of the locking piece is abutted against the upper surface of the web plate, and the bolt and the nut are pre-tightened, so that the locking piece is fixedly connected with the positioning frame; then, the second adjusting piece is adjusted to enable the wing plate on the other side to be fixed in the positioning frame;
(3) The first supporting pieces are arranged on the two sides of the positioning frame and the outside of the locking piece in a buckling manner, so that the supporting pieces are fixedly connected with the assembly welding positioning device; horizontally hoisting the connected device, placing the device on a roller frame, and carrying out double-side flat welding position alternate welding on welding seams of a side wing plate and a web plate which are accurately assembled;
(4) And (3) after the welding is finished, loosening the supporting piece, the locking piece and the first adjusting piece, precisely assembling the welded part with the other side wing plate according to the step (2), and after the supporting piece is installed, carrying out double-side flat welding position alternate welding to finish the welding of the H-shaped steel.
Taking a set of H-shaped steel as an example, from the installation to the completion of welding, the welding speed is 16 hours/meter, and compared with the welding speed in the prior art, the efficiency is improved by 40%.
And (3) detecting welding quality of the welded large H-shaped steel, wherein the result shows that: the qualification rate of the nondestructive testing of the welding line is 100 percent.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "front", "rear", etc. are based on the positional or positional relationship in the operation state of the present invention, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the invention can be subjected to various substitutions and improvements, and all fall within the protection scope of the invention.
Claims (4)
1. A welding method of large-scale stainless steel welding H-shaped steel adopts a large-scale stainless steel welding H-shaped steel assembly welding positioning device, which is characterized in that the device comprises a positioning frame (1) and a locking piece (2), wherein the positioning frame (1) is used for assembling steel plates of the H-shaped steel,
The locking piece (2) is rotatably connected to the positioning frame (1) through the rotating shaft (3) so that the positions of the steel plates in the group are fixed;
The positioning frame (1) is an adjustable welded steel structure frame body, the positioning frame (1) comprises a top rod (12) and a bottom rod (14), wherein the top rod (12) and the bottom rod (14) are arranged in parallel and both comprise two,
A plurality of side rods (13) are uniformly arranged between the ejector rod (12) and the bottom rod (14), and the side rods (13) are arranged outside the ejector rod (12) and the bottom rod (14);
A plurality of positioning plates (11) are also arranged in the positioning frame (1) and are used for positioning and welding the positions of the H-shaped steel plates, wherein,
The positioning plates (11) are fixed on the two bottom rods (14) through cross beams, and the plate surfaces of the positioning plates (11) are perpendicular to the bottom rods (14);
The top surface of the positioning plate (11) is in contact with a web plate (100) of the welded H-shaped steel so as to position the web plate;
the side surface of the positioning plate (11) is in contact with a wing plate (200) welded with H-shaped steel so as to position the wing plate;
the locking piece (2) comprises a V-shaped plate (21), the bottom end of the V-shaped plate is of a straight structure, and the bottom end of the V-shaped plate is parallel to the upper surface of a web plate (100) of the welded H-shaped steel;
the locking piece (2) further comprises a roller (22), and the roller (22) is arranged at the straight bottom end of the V-shaped plate (21) so that the locking piece is in rolling contact with a web plate of the welded H-shaped steel;
The method comprises the following steps:
Step 1, installing and adjusting a welding positioning device;
Step 2, installing a steel plate of the welded H-shaped steel, and accurately assembling a wing plate and a web plate on one side of the steel plate;
Step 3, installing a supporting piece (5), hoisting and welding;
Step 4, loosening the assembly after welding, performing accurate assembly of the other side wing plate and the web plate, and welding after installing the supporting piece to finish welding of the H-shaped steel;
the method further comprises the steps of: before welding, the wing plates are processed and molded and then assembled with the web plates, the welding positions are two X-shaped grooves, the X-shaped grooves are welded at two sides of a welding line,
And (3) performing flat welding on the whole welding seam, performing flat welding on the other side of the welding seam after the H-shaped steel is turned 180 degrees by a welder from one end of the welding seam to the other end of the welding seam by the position of the flat welding seam, and repeatedly performing the steps.
2. The welding method according to claim 1, wherein in step2, after the one side wing plate is aligned with the web plate accurately, the position of the other side wing plate is fixed, but the accurate alignment is not performed.
3. The welding method according to claim 1, characterized in that a plurality of shaft lugs (17) are provided on the outer side of one of the carrier rods (12), the shaft lugs (17) being provided on the upper part of the same side rod (13),
The other ejector rod (12) is provided with a groove (18), and the groove (18) is arranged at the upper part of the side rod (13) at the same side and corresponds to the position of the shaft lug (17).
4. A welding method according to claim 3, wherein one end of the locking member (2) is fixed to the lug (17) by the rotating shaft (3),
The other end is detachably fixed in the groove (18) through the fixing piece (4).
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| CN115319271B (en) * | 2022-07-29 | 2023-11-14 | 杭萧钢构(广东)有限公司 | Steel box type electroslag welding method |
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