CN112935694A - Round support rounding support and steel plate rounding welding construction method - Google Patents
Round support rounding support and steel plate rounding welding construction method Download PDFInfo
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- CN112935694A CN112935694A CN202110201079.4A CN202110201079A CN112935694A CN 112935694 A CN112935694 A CN 112935694A CN 202110201079 A CN202110201079 A CN 202110201079A CN 112935694 A CN112935694 A CN 112935694A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 145
- 239000010959 steel Substances 0.000 title claims abstract description 145
- 238000003466 welding Methods 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims description 32
- 210000001503 joint Anatomy 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 13
- 230000008093 supporting effect Effects 0.000 claims description 11
- 239000007789 gas Substances 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
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- 238000001514 detection method Methods 0.000 description 2
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- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
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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
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
Abstract
The invention provides a circular support circle-protecting support and a steel plate rounding welding construction method, which belong to the technical field of steel cylinder processing, wherein the circular support circle-protecting support comprises a circular ring body, a central column and a pair of pull rods, the circular ring body comprises a plurality of first arc-shaped plates and a plurality of second arc-shaped plates, the first arc-shaped plates and the second arc-shaped plates are alternately arranged around the same axis, and are connected end to form the circular ring body in a surrounding manner, and the circular ring body is used for being attached to the inner side of a steel plate; the central column is positioned in the circular ring body and is coaxially arranged with the circular ring body; the pair of pull rods is connected between the central column and the first arc-shaped plate and between the central column and the second arc-shaped plate, the pair of pull rods is arranged along the radial direction of the circular ring body, and a plurality of pull rods are radially distributed around the central shaft of the circular ring body. The round support circle-protecting support and the steel plate rounding welding construction method provided by the invention improve the processing efficiency.
Description
Technical Field
The invention belongs to the technical field of steel cylinder processing, and particularly relates to a round support circle-protecting support and a steel plate rounding welding construction method.
Background
At present, the processing steps of the steel cylinder comprise blanking, rounding, welding, correcting and the like. The steel plate is directly subjected to butt welding after rounding, and the steel cylinder is bent and welded, so that the diameter of the steel cylinder is large, the quality of the steel cylinder is medium, the stability of the whole structure is poor, and the geometric size deviation is easily caused during welding, so that the geometric size mutation is caused after welding, and the requirement on the machining precision of the steel cylinder cannot be met. The size of the welded steel plate needs to be corrected after welding, so that the difficulty is high, the time consumption is high, and the construction quality is poor.
Disclosure of Invention
The invention aims to provide a round support circle-protecting support and a steel plate rounding welding construction method, and aims to solve the technical problems that the existing steel cylinder is low in machining precision and high in labor intensity due to the fact that later-stage correction is needed.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a circle support is protected to circular support for guarantee the circularity of steel sheet after the rounding, include:
the circular ring body comprises a plurality of first arc-shaped plates and a plurality of second arc-shaped plates, the first arc-shaped plates and the second arc-shaped plates are alternately arranged around the same axis, and are connected end to form the circular ring body in a surrounding manner, and the circular ring body is used for being attached to the inner side of the steel plate;
the central column is positioned inside the circular ring body and is coaxially arranged with the circular ring body; and
the opposite pull rods are connected between the central column and the first arc-shaped plate and between the central column and the second arc-shaped plate, the opposite pull rods are arranged along the radial direction of the circular ring body, and a plurality of opposite pull rods are radially distributed around the central shaft of the circular ring body.
As another embodiment of this application, the radian value of the inboard cambered surface of first arc equals the radian value of the cambered surface of the outside of first arc, the radian value of the inboard cambered surface of second arc equals the radian value of the cambered surface of the outside of second arc, the radian value of the inboard cambered surface of first arc equals the radian value of the inboard cambered surface of second arc.
As another embodiment of this application, the radian value of the inboard cambered surface of first arc is greater than the radian value of the cambered surface of the outside of first arc, the radian value of the inboard cambered surface of second arc is less than the radian value of the cambered surface of the outside of second arc, the radian value of the inboard cambered surface of first arc is less than the radian value of the inboard cambered surface of second arc.
As another embodiment of this application, be equipped with taut subassembly on the first arc, taut subassembly is used for tightening up the piece of steel sheet, taut subassembly includes:
the two ear plates are used for being fixedly connected to the two butt ends of the steel plate respectively; and
the double-end hydraulic cylinder, the cylinder body of double-end hydraulic cylinder is fixed in first arc, the two piston rods of double-end hydraulic cylinder respectively with the otic placode rotates to be connected.
As another embodiment of the present application, the tie-rod includes:
a main rod body;
the telescopic rod bodies are respectively arranged at two ends of the main rod body and can be telescopically adjusted along the axis of the main rod body; and
and the tightening ring is connected to the end part of the main rod body and used for fixing the telescopic position of the telescopic rod body.
As another embodiment of the present application, the outer periphery of the central pillar has a plurality of first butt planes, one end of the tie rod close to the central pillar has a second butt plane, and the second butt plane is used for being attached to the first butt plane and corresponds to the first butt plane one by one.
As another embodiment of the present application, a baffle is disposed at one end of the tie rod close to the central column, and the plate surface of the baffle forms the second butt plane;
the baffle plate is connected with the central column through a threaded connecting piece, an inserting rod is arranged on the baffle plate in a protruding mode, and a socket used for being matched with the inserting rod is arranged on the first butt-joint plane.
The round support round-protecting bracket provided by the invention has the beneficial effects that: compared with the prior art, the round support circle protecting support provided by the invention can form support in a rounded steel plate through the interaction of the first arc-shaped plate or the second arc-shaped plate, the pair of pull rods and the central column, and prevent the steel plate from deforming due to factors such as dead weight and the like, so that the size of a steel cylinder formed after welding is within a specified error range, and the production quality of the steel cylinder is ensured; because the earlier stage supporting effect of the round circle-protecting support on the steel cylinder is better, the round circle-protecting support replaces the subsequent correction process, the correction is completed while welding, the processing efficiency is improved, and the construction quality is optimized.
The invention also provides a steel plate rounding welding construction method, which comprises the following steps:
s1: cutting a steel plate with a preset length;
s2: rounding the steel plate by a rounding machine;
s3: firstly, a first arc-shaped plate is arranged on the inner side of the butt joint of the rounded steel plates, then the installation of other first arc-shaped plates and second arc-shaped plates is completed one by one, and the adjacent first arc-shaped plates and the second arc-shaped plates are fixed through threaded connecting pieces;
s4: connecting one end of each counter pull rod with the first arc-shaped plate or the second arc-shaped plate, and fixing the other ends of the counter pull rods on a central column;
s5: and welding the butt joint of the steel plates to form a steel cylinder.
As another embodiment of the present application, the step S1 specifically includes:
s11: when the cutting path is a straight line, the knife surface of the cutting knife and the plate surface of the steel plate form an included angle, and when the cutting path is a curve, the knife surface of the cutting knife is vertical to the plate surface of the steel plate;
s12: performing groove processing on the butt joint end of the steel plate, and performing groove processing on the outer side of the steel plate when the thickness of the steel plate is lower than a preset value; and when the thickness of the steel plate is equal to or higher than a preset value, performing groove treatment on the inner side and the outer side of the steel plate.
As another embodiment of this application, evenly set up a plurality of circular rings body along the axis of steel sheet after the rounding, every be equipped with two cross distribution at least on the circular ring body the diagonal rod, different on the circular ring body the diagonal rod is crisscross to be distributed, every on the circular ring body the diagonal rod all connect in same the center post.
The steel plate rounding welding construction method provided by the invention has the beneficial effects that: compared with the prior art, the steel plate rounding welding construction method provided by the invention has the same technical effect as the circular supporting and circle protecting bracket on the basis of adopting the circular supporting and circle protecting bracket, and is not repeated herein.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a circular support circle protecting bracket according to an embodiment of the present invention;
FIG. 2 is an enlarged view of part A of FIG. 1;
FIG. 3 is an enlarged view of the portion B of FIG. 1;
FIG. 4 is a schematic structural diagram of a circular support circle protecting bracket according to a second embodiment of the present invention;
FIG. 5 is a schematic view illustrating a usage status of a circular support circle protecting bracket according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a groove structure adopted in a steel plate rolling circle welding construction method according to an embodiment of the present invention.
In the figure: 1. a circular ring body; 101. a first arc-shaped plate; 102. a second arc-shaped plate; 2. a central column; 3. a pull rod is arranged; 301. a main rod body; 302. a telescopic rod body; 303. tightening the ring; 4. a tension assembly; 401. an ear plate; 402. a double-headed hydraulic cylinder; 5. a baffle plate; 6. inserting a rod; 7. a socket; 8. and (3) a steel plate.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 5, a circular support bracket according to the present invention will be described. The circular support circle-protecting support comprises a circular ring body 1, a central column 2 and a pair of pull rods 3, wherein the circular ring body 1 comprises a plurality of first arc-shaped plates 101 and a plurality of second arc-shaped plates 102, the first arc-shaped plates 101 and the second arc-shaped plates 102 are alternately arranged around the same axis, and are connected end to form the circular ring body 1 in a surrounding manner, and the circular ring body 1 is used for being attached to the inner side of a steel plate 8; the central column 2 is positioned inside the circular ring body 1 and is coaxial with the circular ring body 1; the opposite pull rods 3 are connected between the central column 2 and the first arc-shaped plate 101 and between the central column 2 and the second arc-shaped plate 102, the opposite pull rods 3 are arranged along the radial line of the circular ring body 1, and a plurality of opposite pull rods are radially distributed around the central axis of the circular ring body 1.
The round supporting and circle protecting bracket is used for being installed on the inner side of a rounded steel plate 8, the rounded steel plate 8 is encircled to form a round shape, and a steel cylinder is formed by welding the butt joint of the steel plate 8, and the round supporting and circle protecting bracket specifically comprises two installation modes:
(1) when 8's of steel sheet after the rolling circle face was on a parallel with ground and is placed, fix a first arc 101 in 8 butt joint departments of steel sheet earlier, prevent to make 8 butt joint departments of steel sheet grow because kick-backing, then accomplish the installation of other first arc 101 and second arc 102 in proper order, connect through threaded connection spare after first arc 101 and the installation of second arc 102 are accomplished and form complete circular ring body 1, the butt pull rod 3 is connected to the inside different positions of circular ring body 1, a plurality of butt pull rods 3 are connected on same center post 2, can weld 8 butt joint departments of steel sheet afterwards, the welding is accomplished and is formed the steel drum, reverse demolish center post 2 according to the installation order, butt pull rod 3, first arc 101 and second arc 102.
(2) When the surface of the rounded steel plate 8 is placed perpendicular to the ground, the central column 2 is placed in the steel plate 8 and fixed on the ground, the counter-pull rod 3 is connected to the central column 2, then fixing a first arc-shaped plate 101 at the butt joint of the steel plate 8 to prevent the gap at the butt joint of the steel plate 8 from being enlarged due to springback, then sequentially completing the installation of other first arc-shaped plates 101 and second arc-shaped plates 102, connecting the butt pull rod 3 fixed on the central column 2 with the installed first arc-shaped plate 101 and second arc-shaped plate 102, connecting the adjacent first arc-shaped plate 101 and second arc-shaped plate 102 through a threaded connecting piece to form a complete circular ring body 1, then welding the butt joint of the steel plate 8 to form a steel cylinder after welding, and reversely detaching the first arc-shaped plate 101, the second arc-shaped plate 102, the opposite pull rod 3 and the central column 2 according to the installation sequence.
Compared with the prior art, the round supporting and circle protecting support provided by the invention can form a support in the rounded steel plate 8 through the interaction of the first arc-shaped plate 101 or the second arc-shaped plate 102, the pull rod 3 and the central column 2, and prevent the steel plate 8 from deforming due to factors such as dead weight and the like, so that the size of a steel cylinder formed after welding is within a specified error range, and the production quality of the steel cylinder is ensured; because the earlier stage supporting effect of the round circle-protecting support on the steel cylinder is better, the round circle-protecting support replaces the subsequent correction process, the correction is completed while welding, the processing efficiency is improved, and the construction quality is optimized.
Referring to fig. 4, the arc value of the inner arc surface of the first arc plate 101 is equal to the arc value of the outer arc surface of the first arc plate 101, the arc value of the inner arc surface of the second arc plate 102 is equal to the arc value of the outer arc surface of the second arc plate 102, and the arc value of the inner arc surface of the first arc plate 101 is equal to the arc value of the inner arc surface of the second arc plate 102. As can be seen, the first arc-shaped plate 101 and the second arc-shaped plate 102 have the same shape and size, so that the same batch of manufacturing is facilitated when the first arc-shaped plate 101 and the second arc-shaped plate 102 are produced, and the manufacturing difficulty is reduced; the first arc-shaped plate 101 is the same as the second arc-shaped plate 102 in shape and size, and when the steel plate is installed, sorting work is not needed, the first arc-shaped plate 101 or the second arc-shaped plate 102 which are taken randomly are installed at the butt joint of the steel plate 8 firstly, and then the first arc-shaped plate 101 or the second arc-shaped plate 102 are connected in sequence.
Referring to fig. 1, the arc value of the inner arc surface of the first arc plate 101 is greater than the arc value of the outer arc surface of the first arc plate 101, the arc value of the inner arc surface of the second arc plate 102 is less than the arc value of the outer arc surface of the second arc plate 102, and the arc value of the inner arc surface of the first arc plate 101 is less than the arc value of the inner arc surface of the second arc plate 102.
Here, the circular ring body 1 is exemplified to include two first arc-shaped plates 101 and two second arc-shaped plates 102, and the specific installation process is as follows: a first arc-shaped plate 101 is arranged at the butt joint of a steel plate 8, then a second arc-shaped plate 102 is respectively arranged at two ends of the arranged first arc-shaped plate 101, finally another first arc-shaped plate 101 is arranged, and the adjacent first arc-shaped plates 101 and the second arc-shaped plates 102 are connected through threaded connectors.
After the installation process is completed, the butt joint of the first arc-shaped plate 101 and the second arc-shaped plate 102 is in a close fit relationship or a mutual extrusion relationship, and when the butt joint of the first arc-shaped plate 101 and the second arc-shaped plate 102 is extruded mutually, because the radian of the inner side surface of the first arc-shaped plate 101 is greater than that of the outer side surface, the first arc-shaped plate 101 can be automatically extruded after the threaded connecting piece between the first arc-shaped plate 101 and the second arc-shaped plate 102 is removed under the condition that the two second arc-shaped plates 102 at two sides of the first arc-shaped plate 101 are extruded, so that the first arc-shaped plate 101 can be conveniently removed, and further the second arc-shaped plate 102 can be conveniently removed; in the same way, the structure is convenient for the installation of the first arc-shaped plate 101 and the second arc-shaped plate 102, the labor intensity required during the loading and unloading is reduced, the camber value of the inner side cambered surface of the first arc-shaped plate 101 is smaller than that of the inner side cambered surface of the second arc-shaped plate 102, and the loading and unloading are also convenient for the first arc-shaped plate 101 and the second arc-shaped plate 102.
Referring to fig. 1 to 2, the first arc plate 101 is provided with a tensioning assembly 4, the tensioning assembly 4 is used for tightening the abutted seams of the steel plates 8, the tensioning assembly 4 comprises two lug plates 401 and a double-head hydraulic cylinder 402, the two lug plates 401 are used for being respectively and fixedly connected to two connection ends of the steel plates 8; the cylinder body of the double-head hydraulic cylinder 402 is fixed on the first arc-shaped plate 101, and two piston rods of the double-head hydraulic cylinder 402 are respectively connected with the lug plates 401 in a rotating manner. After the circular ring body 1 is installed, the butt joint of the steel plate 8 may not be completely attached, the two lug plates 401 are welded to the steel plate 8, the two lug plates 401 are respectively located at two butt ends of the steel plate 8, the two lug plates 401 can be pulled to be close to each other by controlling the piston rods at the two ends of the double-head hydraulic cylinder 402 to synchronously contract, and therefore tightening of the two butt ends of the steel plate 8 is achieved, manual operation is replaced, a weld joint is reduced, and welding quality is improved.
Referring to fig. 1 to 4, the opposite-pull rod 3 includes a main rod 301, a telescopic rod 302 and a tightening ring 303, the telescopic rod 302 is respectively disposed at two ends of the main rod 301, and the telescopic rod 302 can be adjusted in a telescopic manner along an axis of the main rod 301; the tightening ring 303 is connected to an end of the main rod 301 for fixing a telescopic position of the telescopic rod 302. The telescopic rod body 302 can be released from being fixed by screwing the tightening ring 303, at the moment, the telescopic rod body 302 can be adjusted in a sliding mode relative to the main rod body 301, so that the length of the whole opposite pull rod 3 is changed, the opposite pull rod 3 can be suitable for circular ring bodies 1 of different specifications by changing the length of the opposite pull rod 3, the application range is improved, and the use cost is reduced; in addition, the length of the pull rod 3 can be changed by finely adjusting the telescopic rod body 302 in the using process, the supporting strength of the circular ring body 1 is changed, and the use flexibility is high.
Preferably, the main rod body 301 is a hollow rod body, the telescopic rod body 302 is inserted into the main rod body 301, and under the condition that the tightening ring 303 is not tightened, the telescopic rod body 302 can be pulled to realize telescopic sliding adjustment with the main rod body 301.
As another embodiment, the tightening ring 303 is provided with an internal thread, the main rod 301 is a hollow rod, the telescopic rod 302 is a threaded rod and is matched with the internal thread on the tightening ring 303, and the telescopic rod 302 can be extended and retracted by rotating the telescopic rod 302, so that the operation and adjustment are facilitated.
Referring to fig. 1 and 3, the outer peripheral surface of the central pillar 2 has a plurality of first butt planes, and one end of the tie rod 3 close to the central pillar 2 has a second butt plane, which is used for being attached to the first butt planes and corresponding to the first butt planes one by one. For example: six counter pull rods 3 are arranged, the central column 2 is of a hexagonal prism structure, and six surfaces of the hexagonal prism parallel to the axial direction respectively correspond to the six counter pull rods 3, so that the positions of the counter pull rods 3 which need to be installed on the central column 2 can be conveniently and visually seen, and the installation is convenient; the first butt-joint plane and the second butt-joint plane are both planes, and compared with the situation that the opposite pull rod 3 is arranged on the circular arc surface, the stability of the opposite pull rod 3 arranged on the first butt-joint plane is higher, the opposite pull rod 3 is prevented from deviating from the radial line of the circular ring body 1, the axial line of the opposite pull rod 3 is ensured to be parallel to the radial line of the circular ring body 1,
referring to fig. 3, a baffle 5 is arranged at one end of the opposite pull rod 3 close to the central column 2, and a second butt plane is formed on the plate surface of the baffle 5; baffle 5 and center post 2 pass through threaded connection spare to be connected, and the protrusion is equipped with inserted bar 6 on baffle 5, is equipped with on the first butt joint plane to be used for with inserted bar 6 complex socket 7. When connecting on drag link 3 and center post 2, adjust earlier and insert 7 departments on the jack 6 on the drag link 3 inserts the center post 2, then guarantee the laminating of second butt joint plane on the drag link 3 and the first butt joint plane on the center post 2, through these two spacing relations, conveniently fix a position the installation to drag link 3, the installation after to drag link 3 stability stronger, optimize the supporting effect.
In particular, the structure for mounting the tie rod 3 to the first arc 101 or the second arc 102 is also mounted by the baffle 5 and the threaded connection, but without the structure of the inserted rod 6 and the socket 7.
The invention also provides a steel plate welding construction method. The steel plate welding construction method comprises the following steps:
s1: cutting a steel plate 8 with a preset length;
s2: rounding the steel plate 8 by a rounding machine;
s3: firstly, a first arc-shaped plate 101 is arranged on the inner side of the butt joint of the rounded steel plates 8, then the other first arc-shaped plates 101 and the other second arc-shaped plates 102 are arranged one by one, and the adjacent first arc-shaped plates 101 and the adjacent second arc-shaped plates 102 are fixed through threaded connecting pieces;
s4: one end of each counter pull rod 3 is connected with the first arc-shaped plate 101 or the second arc-shaped plate 102, and the other ends of the counter pull rods 3 are fixed on the central column 2;
s5: and welding the butt joint of the steel plates 8 to form a steel cylinder.
Compared with the prior art, the steel plate rounding welding construction method provided by the invention has the advantages that the circular support circle-protecting bracket is arranged in the steel plate 8 before the steel plate 8 is welded, and through the interaction of the first arc-shaped plate 101 or the second arc-shaped plate 102, the pair pull rod 3 and the central column 2, a support can be formed in the rounded steel plate 8, so that the steel plate 8 is prevented from deforming due to factors such as dead weight and the like, the size of a steel cylinder formed after welding is in a specified error range, and the production quality of the steel cylinder is ensured; because the earlier stage supporting effect of the round circle-protecting support on the steel cylinder is better, the round circle-protecting support replaces the subsequent correction process, the correction is completed while welding, the processing efficiency is improved, and the construction quality is optimized.
Referring to fig. 6, the step S1 specifically includes:
s11: when the cutting path is a straight line, the knife surface of the cutting knife forms an included angle with the plate surface of the steel plate 8, and when the cutting path is a curve, the knife surface of the cutting knife is vertical to the plate surface of the steel plate 8;
s12: performing groove processing on the butt joint end of the steel plate 8, and performing groove processing on the outer side of the steel plate 8 when the thickness of the steel plate 8 is lower than a preset value; when the thickness of the steel plate 8 is equal to or higher than a preset value, beveling is performed on both the inner side and the outer side of the steel plate 8.
The cutting mode is gas cutting blanking, and the surface of a cut workpiece is smooth and clean. If the surface is uneven or has serious greasy dirt, rust, etc., the cutting can not be carried out. In order to reduce the deformation of the workpiece and facilitate gas cutting and slag removal, the workpiece should be flatly padded or a fulcrum is selected, and a space with a certain height is reserved below the workpiece.
When the workpiece is gas-cut, the cutting is finished at the larger part of the excess material so as to prevent the workpiece from moving due to thermal deformation and influencing the size of the workpiece. When cutting the slender workpiece, intermittent cutting or simultaneous bilateral cutting is adopted. Before ignition, the pressure reducers of oxygen and acetylene gas are adjusted to the pressure value required by work; when in ignition, a small amount of preheating oxygen (about a quarter of a circle) is started first and then the mixed gas is ignited; when fire is extinguished, the cutting oxygen is firstly closed, and then the acetylene gas and the preheating oxygen are closed. If the flame is suddenly extinguished due to tempering in the gas cutting process, the cutting oxygen is immediately closed, and then the acetylene gas and the preheating oxygen are sequentially closed to prevent the backfire of the non-pilot flame.
After the cutting torch is shut off when the cutting is finished or the cutting torch stops working for a long time, the gas supply valves of the oxygen cylinder and the acetylene cylinder are closed conveniently, and the pressure reducer adjusting screw is loosened. When the pressure of bottled oxygen is 0.1-0.2 MPa gauge pressure and acetylene gas is 0.1MPa gauge pressure, the bottled oxygen is immediately stopped, and the valve is closed to retain the rest gas.
The process of groove treatment is as follows: using an edge milling machine to prefabricate the groove, referring to fig. 6 (a), the 8mm plates are butted by adopting a single-V groove (namely, only the outer side of the steel plate 8 is provided with the groove), a single side is 30 degrees, and a 2mm blunt side is adopted; referring to fig. 6 (a), a transition section needs to be prefabricated for a butt joint groove of 8mm +16mm, the groove adopts a single V groove (namely, the groove is made only on the outer side of the steel plate 8), and the single side is 30 degrees and the 2mm truncated side is adopted; referring to fig. 6 (b), the 16mm plates are butted by using an X-shaped groove (i.e. grooves are formed on both the inner side and the outer side of the steel plate 8), and the single side is 30 degrees and the 2mm truncated side is adopted. The groove form, the groove angle and the truncated edge are in accordance with the regulations in the welding process.
Referring to fig. 5, a plurality of circular ring bodies 1 are uniformly arranged along the axis of the rounded steel plate 8, at least two tie rods 3 are arranged on each circular ring body 1 in a crossed manner, the tie rods 3 on different circular ring bodies 1 are distributed in a staggered manner, and the tie rods 3 on each circular ring body 1 are all connected to the same central column 2.
For example: the steel cylinder consists of a cylinder body, a seal head and support legs, wherein the cylinder body has the diameter of 6 meters and the length of 6.4 meters, and is formed by splicing and welding three sections of cylinders with the thicknesses of 2.2 meters, 2 meters, 2.2 meters and 16mm, the delivery is divided into two sections of 4.2 meters and 2.2 meters according to the transportation capacity, and one girth weld is spliced and welded on site.
Through a plurality of circular ring bodies 1 of different position installation on the steel drum axis, can guarantee that the different positions of steel drum all are in the support when the welding and load, even the axial of steel drum is longer, quality when also can guarantee the welding of steel drum optimizes size quality.
The following can be applied as an example of the steel plate rolling circle welding construction method: the invention relates to an outer steel pipe for a low-vacuum superconducting magnetic suspension steel pipe beam engineering project, which applies the method for rolling the pipeline into the cylinder. The diameter of the engineering pipeline is phi 6000 mm, the wall thickness is 20 mm, the material quality is Q3545D, and the length of the pipeline is about 6 m.
(1): according to the processing capability of the existing three-roller plate rolling machine, the maximum processing length of a single section of the cylinder is determined to be 2000 mm, the unfolding length of the cylinder with the phi 6000 mm and the wall thickness of 20 mm is calculated to be 18840 mm according to a neutral layer, and in consideration of the extension and interface clearance of the steel plate 8 after the round rolling processing, the steel plate 8 with the plate width of 2000 mm is selected for scribing and cutting to obtain the steel plate with the width of 2000 mm and the length of 18840 mm. And cutting the reserved round hole by using a full-automatic laser cutting machine according to the position of the reserved hole on the drawing.
(2) Groove opening: and flattening the lower steel plate 8, and performing groove cutting by using a full-automatic oxyacetylene sports car.
(3) Rounding: and (3) hanging the lower steel plate material on a roller way of a feeding port of the plate bending machine, aligning the lower steel plate material with an inlet, starting rounding processing, gradually lowering the upper roller, keeping the upper roller and the lower roller parallel all the time, checking by using an inner arc template at any time, stopping the plate bending processing until the radian of the end steel plate 8 meets the requirement and the gap between the two ends of the cylinder interface is 2-3 mm, hanging out the cylinder, and vertically storing.
(4) The round support supports the round: the steel drum after the rounding is finished is supported and rounded by a circular support rounding support, a central column 2, a pair of pull rods 3, a second arc plate 102 and a first arc plate 101 are sequentially installed in the steel drum (under the condition that the axis of the steel drum is vertical to the ground), ear plates 401 on tensioning assemblies 4 are respectively welded at two ends of a longitudinal groove of the steel drum, a double-head hydraulic cylinder 402 is tightened, the drawing assemblies of the rounding support, the pull rods 3, the central column 2 and other assemblies are adjusted to adjust the radius of the steel drum and the radian of an interface position, and the roundness of the steel drum is adjusted.
(5) Welding and leakage detection: and horizontally placing the adjusted cylinder crater upwards, installing a ceramic base plate on the inner side of the crater, closely adhering the ceramic base plate to the inner side crater, and carrying out flat welding on the crater by adopting a manual electric welding mode. And clearing the inner side ceramic base plate after welding is finished, installing a leakage detection tool at the inner side, vacuumizing in the tool to keep a negative pressure state, spraying helium on a welding surface after pressure is stable, automatically detecting helium leakage in the tool by a system, and detecting leakage after requirements are met.
(6) Welding a stiffened plate dismantling circle-protecting device: after the welding of the steel drum is completed, the annular reinforced rib plate is welded on the outer side of the steel drum to keep the rigidity and stability of the steel drum, and after the welding of the reinforced rib plate is completed, the circular framework circle protecting device is removed to complete the rolling work of the steel drum.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Circular support circle-protecting support for guarantee the radian of round steel board behind the rounding, its characterized in that includes:
the circular ring body comprises a plurality of first arc-shaped plates and a plurality of second arc-shaped plates, the first arc-shaped plates and the second arc-shaped plates are alternately arranged around the same axis, and are connected end to form the circular ring body in a surrounding manner, and the circular ring body is used for being attached to the inner side of the steel plate;
the central column is positioned inside the circular ring body and is coaxially arranged with the circular ring body; and
the opposite pull rods are connected between the central column and the first arc-shaped plate and between the central column and the second arc-shaped plate, the opposite pull rods are arranged along the radial direction of the circular ring body, and a plurality of opposite pull rods are radially distributed around the central shaft of the circular ring body.
2. The circular support circle-protecting bracket of claim 1, wherein the arc value of the inner arc surface of the first arc plate is equal to the arc value of the outer arc surface of the first arc plate, the arc value of the inner arc surface of the second arc plate is equal to the arc value of the outer arc surface of the second arc plate, and the arc value of the inner arc surface of the first arc plate is equal to the arc value of the inner arc surface of the second arc plate.
3. The circular support circle-protecting bracket of claim 1, wherein the arc value of the inner arc surface of the first arc plate is greater than the arc value of the outer arc surface of the first arc plate, the arc value of the inner arc surface of the second arc plate is less than the arc value of the outer arc surface of the second arc plate, and the arc value of the inner arc surface of the first arc plate is less than the arc value of the inner arc surface of the second arc plate.
4. The circular support rounding bracket of claim 3, wherein a tensioning assembly is provided on said first arc, said tensioning assembly being adapted to tighten the splice of the steel plate, said tensioning assembly comprising:
the two ear plates are used for being fixedly connected to the two butt ends of the steel plate respectively; and
the double-end hydraulic cylinder, the cylinder body of double-end hydraulic cylinder is fixed in first arc, the two piston rods of double-end hydraulic cylinder respectively with the otic placode rotates to be connected.
5. The circle supporting rounding bracket of claim 1, wherein the tie-rod comprises:
a main rod body;
the telescopic rod bodies are respectively arranged at two ends of the main rod body and can be telescopically adjusted along the axis of the main rod body; and
and the tightening ring is connected to the end part of the main rod body and used for fixing the telescopic position of the telescopic rod body.
6. The circular support rounding bracket of claim 1, wherein the outer circumference of the central post has a plurality of first butting planes, and the end of the tie-rod near the central post has a second butting plane, and the second butting plane is used for being attached to the first butting plane and corresponding to the first butting plane one by one.
7. The round support rounding bracket of claim 6, wherein a baffle is provided at an end of the tie-rod adjacent to the center post, and a plate surface of the baffle forms the second butt plane;
the baffle plate is connected with the central column through a threaded connecting piece, an inserting rod is arranged on the baffle plate in a protruding mode, and a socket used for being matched with the inserting rod is arranged on the first butt-joint plane.
8. A steel plate rounding welding construction method is characterized by comprising the following steps:
s1: cutting a steel plate with a preset length;
s2: rounding the steel plate by a rounding machine;
s3: firstly, a first arc-shaped plate is arranged on the inner side of the butt joint of the rounded steel plates, then the installation of other first arc-shaped plates and second arc-shaped plates is completed one by one, and the adjacent first arc-shaped plates and the second arc-shaped plates are fixed through threaded connecting pieces;
s4: connecting one end of each counter pull rod with the first arc-shaped plate or the second arc-shaped plate, and fixing the other ends of the counter pull rods on a central column;
s5: and welding the butt joint of the steel plates to form a steel cylinder.
9. The steel plate rounding welding construction method according to claim 8, wherein the step S1 specifically includes:
s11: when the cutting path is a straight line, the knife surface of the cutting knife and the plate surface of the steel plate form an included angle, and when the cutting path is a curve, the knife surface of the cutting knife is vertical to the plate surface of the steel plate;
s12: performing groove processing on the butt joint end of the steel plate, and performing groove processing on the outer side of the steel plate when the thickness of the steel plate is lower than a preset value; and when the thickness of the steel plate is equal to or higher than a preset value, performing groove treatment on the inner side and the outer side of the steel plate.
10. The steel plate rounding welding construction method according to claim 8, wherein a plurality of circular ring bodies are uniformly arranged along an axis of the rounded steel plate, at least two tie rods are arranged on each circular ring body in a crossed manner, the tie rods on different circular ring bodies are arranged in a staggered manner, and the tie rods on each circular ring body are connected to the same center column.
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Application publication date: 20210611 |