CN111365543A - Round-top square tube and processing method thereof - Google Patents
Round-top square tube and processing method thereof Download PDFInfo
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- CN111365543A CN111365543A CN202010225771.6A CN202010225771A CN111365543A CN 111365543 A CN111365543 A CN 111365543A CN 202010225771 A CN202010225771 A CN 202010225771A CN 111365543 A CN111365543 A CN 111365543A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/14—Joints for pipes of different diameters or cross-section
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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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- General Engineering & Computer Science (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a processing method of a hemispherical dome tube, which comprises the following steps: blanking the pipe body, namely dividing the hemispherical dome pipe into two parts for blanking; welding reinforcing rib plates on the whole triangular plate and the half triangular plate of the two parts of the blanks subjected to blanking for reinforcing; manufacturing two semicircular opening supporting plates and lifting lugs; placing the reinforced wool reinforcing rib plate on an operation platform with the side facing downwards, aligning the middle point of the circular arc of the prefabricated semicircular opening plate with the middle point of the round opening side of the wool, spot-welding the semicircular opening plate on the wool, and welding a pair of lifting lugs at the outer ends of the round opening side and the square opening side of the wool respectively; drawing and forming the guide chain; repeating the steps to manufacture the other half pipe body of the hemispherical dome; and (3) assembling and welding the two manufactured half pipes, welding flanges on the round opening side and the square opening side, cutting off the semi-circular opening supporting plate and the lifting lug which are temporarily fixed on the inner sides, and polishing the welding spots. The method for processing the pipe body has the advantages of few connecting welding seams, high structural strength, high processing efficiency and low production cost.
Description
Technical Field
The invention relates to the technical field of pipeline construction, in particular to a pipe with a hemispherical dome shape and a processing method thereof.
Background
The shape of the lower body and the upper body of the pipe is round and square, and the pipe with the shape of the upper body and the lower body is widely applied to the connection of pipelines with round sections and rectangular sections and equipment, and is mainly applied to wind pipelines, for example: the circular ventilation pipe and the square ventilation pipe, the circular ventilation pipe and the square inlet and outlet of the dust removing equipment, the circular ventilation pipe and the outlet of the fan, the air conditioning unit and the inlet of the fan are connected. Due to the requirements of national environmental protection policies, the upgrading and reconstruction of dust removal systems in the metallurgical industry are more and more, and the field manufacturing amount of corresponding hemispherical dome tubes is more and more.
After lofting and material marking are finished, the traditional manufacturing process of the pipe with the shape of the sky circle and the square earth is generally divided into the following three steps: 1. blanking, cutting the triangular plate and the arc plate into corresponding blanks by gas cutting; 2. manually hammering the arc plate by a sledge hammer, namely putting the cut arc plate on a mould which is manufactured in advance to carry out manual sledge hammer manufacturing until the radian of the arc plate is matched with an arc sample plate which is manufactured in advance; 3. and (4) assembling, welding and forming, namely assembling the triangular plate and the planed arc plate which are subjected to material discharging alternately according to positions, welding the welded junction, and finally checking and finishing the formed size.
The manufacturing method of the skyline-square steel structure with the authorization notice number of CN106425334B comprises the following steps: dividing the hemispherical dome steel structure into four segments in the vertical direction according to a drawing, wherein each segment comprises one corner of the square bottom of the hemispherical dome steel structure, and each segment is unfolded and lofted and is provided with a pressing allowance; pressing the segment, and manufacturing an arc template according to the drawing, wherein the arc template is used for measuring the arc part of the segment to ensure the pressing precision; building an installation platform, drawing a square installation line at the bottom of the hemispherical dome steel structure on the installation platform according to the drawing, assembling and positioning the four segments along the vertical direction according to the installation line, enabling the circle center of the top circle of the hemispherical dome steel structure to coincide with the center of the bottom square, and welding the segments; and the hemispherical dome steel structure is placed in an overturning manner, and T-shaped steel is arranged inside the hemispherical dome steel structure to reinforce the hemispherical dome steel structure.
The above prior art solutions have the following drawbacks: 1. the traditional manufacturing process uses a manual big hammer for planning and has more welding lines, so the labor intensity of the manufacturing process is high, the efficiency is low and the production cost is high. 2. The segments need to be pressed into circular arc shapes by means of compaction equipment, and a mounting platform needs to be built to assemble and fix the four segments, so that the dependency on the equipment is high, the processing process is complicated, the efficiency is low, and the production cost is high.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a pipe body with a hemispherical dome shape and a processing method thereof, wherein the pipe body has the advantages of few connecting welding seams, high structural strength, high processing efficiency and low production cost.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a sky circle local pipe, includes two relative half bodys that set up and sets up the flange at half body both ends, half body includes a whole set-square, connects the arc on two sides of whole set-square and connects the half set-square on the arc side, connects through half set-square between two half bodys.
By adopting the technical scheme, the pipe with the hemispherical dome shape is formed by combining the two half pipe bodies, the structure is simple, only two welding seams are formed between the two half pipe bodies, the welding quantity of the welding seams is minimum, the processing difficulty is low, and time and labor are saved; the structure of the half pipe body is simple, and the blanking is convenient and fast.
The present invention in a preferred example may be further configured to: the whole set square, the arc-shaped plate and the half set square on the same half pipe body are formed into an integral structure.
Through adopting above-mentioned technical scheme, half pipe body adopts integrative forming structure, when the unloading, can once the unloading shaping, when the welding, can reduce welding time, reduces the waste of resource, and integrated into one piece's half pipe body structural strength is high, and resistance to deformation ability is strong, is difficult for taking place to reveal.
The present invention in a preferred example may be further configured to: the two half-face triangular plates on the same half pipe body have the same structure.
By adopting the technical scheme, the shape of the pipe at the round top and the square bottom formed by the half pipe bodies is more regular, the structures of the round mouth side and the square mouth side of the pipe at the round top and the square bottom are more orderly, and the processing quality of the pipe at the round top and the square bottom is improved.
The present invention in a preferred example may be further configured to: and reinforcing rib plates are arranged on the outer sides of the side edges of the whole set square and the half set square in parallel.
Through adopting above-mentioned technical scheme, the setting up of deep floor has strengthened the overall structure intensity of the local pipe of sky circle, has also strengthened the structural strength and the bending strength of set square side department simultaneously, slows down the deformation volume of half body in set square side department, makes the local pipe shape of sky circle that processes out more regular, and the quality is higher.
The present invention in a preferred example may be further configured to: and a distance of 1-5cm is arranged between the reinforcing rib plate at the outer side of the joint of the two adjacent half-triangular plates and the side edge of the half-triangular plate.
Through adopting above-mentioned technical scheme, the welding seam position is left in the junction of two half body to the setting of interval to subsequent crater welding.
A method for processing a pipe with a round top and a square bottom comprises the following steps:
step 1: blanking the pipe body, selecting two opposite triangular plates with the shortest center line, dividing the hemispherical dome pipe into two parts for blanking by taking the center line of the pair of triangular plates as a boundary, and drawing and marking the intersection line of the triangular plates and the arc-shaped plates after the blanking is finished;
step 2: welding reinforcing rib plates on the whole triangular plate and the half triangular plate of the two parts of the blanks subjected to blanking for reinforcing, wherein the reinforcing rib plates are arranged along the edges of the whole triangular plate and the half triangular plate;
and step 3: manufacturing accessories: manufacturing two semicircular opening supporting plates according to the inner diameter of a circular opening of the pipe in the shape of a sky circle and a square place, and manufacturing at least three pairs of lifting lugs;
and 4, step 4: welding a semicircular opening supporting plate and lifting lugs, placing the reinforced woolen reinforcing plate on an operation platform in a downward mode, aligning the middle point of the circular arc of the prefabricated semicircular opening supporting plate with the middle point of the round opening side of the woolen, spot-welding the semicircular opening supporting plate on the woolen, welding a pair of lifting lugs at the outer ends of the round opening side and the square opening side of the woolen respectively, and welding a pair of lifting lugs at the position, close to the round opening end, of the outer end of the middle part of the round opening side and the square opening side of the woolen;
and 5: the guide chain is drawn and formed, a set of hand-pulling guide chain is hung on each of the three pairs of lifting lugs, the guide chain is pulled from the round opening side, the middle guide chain and the square opening side guide chain are sequentially pulled along with the increase of the tilting until the round opening side of the blank completely abuts against the outer edge of the semicircular opening plate, the middle arc of the arc plate is in smooth transition, the square opening side is in a state that the bottom edges of the two semicircular triangular plates are vertical to the bottom edge of the whole triangular plate, after forming, the round opening side wall plate and the semicircular opening plate are fixed by spot welding, and the square opening side is fixed by using temporary lacing wires by spot welding;
step 6: repeating the steps to manufacture the other half pipe body of the hemispherical dome;
and 7: and (3) performing assembly welding, namely performing assembly welding on the two manufactured half pipes, checking that the sizes are correct, welding and connecting flanges on the round opening side and the square opening side, cutting off the semi-circular opening supporting plate and the lifting lug which are temporarily fixed on the inner sides, and polishing the welding spots to be clean, thereby finishing the manufacturing of the hemispherical and square pipes.
By adopting the technical scheme, when the pipe body is fed, a boundary line is marked and drawn, so that the distribution of the triangular plate and the arc-shaped plate is convenient to distinguish, and the subsequent positioning and welding of the reinforcing rib plate are convenient; the reinforcing rib plates are arranged on the side edges of the triangular plate, so that the structural strength and the bending strength of the side edges of the triangular plate can be enhanced, and the deformation of the triangular plate in the pipe bending process is reduced; the accessory is manufactured in advance and can be directly used on site, so that the time cost and the labor cost are saved; the semi-circular opening-supporting plate can support the circular opening side of the semi-pipe body, so that the circular opening side can be kept in a circular arc shape; the lifting lugs arranged at the two ends are convenient for directly controlling the bending deformation of the two ends, the middle lifting lug is matched with the lifting lugs at the two ends, the bending difficulty of the middle position of the half pipe body is reduced, and meanwhile, the smooth transition between the round opening side and the square opening side of the half pipe body can be ensured; after the half pipe body is bent in place, the half pipe body is firstly shaped, so that the half pipe body is prevented from rebounding and deforming, and the uniformity of the processing quality of the half pipe body is ensured; after the half pipe body is assembled and welded, detection and polishing treatment are carried out, and the quality of finished products of the pipe in the round sky and the square earth can be improved.
The present invention in a preferred example may be further configured to: and step 2, welding transverse reinforcing ribs between the reinforcing rib plates in the two triangular plates, wherein the transverse reinforcing ribs are arranged in parallel to the bottom edges of the triangular plates.
Through adopting above-mentioned technical scheme, horizontal strengthening rib can further promote half body structural strength and bending strength in set square department, at the return bend in-process, the deformation half body group butt welding back that reduction set square that can be better produced can be according to the design demand, select to remain or cut off horizontal strengthening rib.
The present invention in a preferred example may be further configured to: and 4, keeping the semi-circular opening expanding plate vertical to the surface of the blank when the semi-circular opening expanding plate is spot-welded on the blank in the step 4.
Through adopting above-mentioned technical scheme, can guarantee that half body plays neat circular port side after buckling and be located same horizontal plane to guarantee that two half body group are to back, the circular port side is located the coplanar.
The present invention in a preferred example may be further configured to: and in the step 5, a gap of 3-5cm is cut at the joint of the whole triangular plate and the half triangular plate at the square opening side.
Through adopting above-mentioned technical scheme, can make the square mouth side of half body change the drawing and target in place, reduce the degree of difficulty of buckling of half body, after the half body shaping, can get rid of the gap welding.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the pipe body of the pipe with the round top and the square bottom is simple in structure, few in connecting welding seams, good in sealing effect and high in structural strength.
2. The manufacturing process of the hemispherical dome pipe is simple, flexible, high in production efficiency and good in forming quality, and achieves the effects of reducing labor intensity, improving efficiency, improving engineering quality and saving cost.
3. The field manufacturing is simple and flexible, the manual hammering manufacturing process is omitted, the noise pollution is reduced, the occupational health hazards of production operators are effectively reduced, the labor intensity of workers is reduced, and the production efficiency is improved.
4. The molding is gradually performed by using the pulling force of the hand-pulling guide chain, the quality is easy to control, and the molding quality is good.
Drawings
FIG. 1 is a schematic view of the overall structure of the pipe of the present invention.
FIG. 2 is a blanking shape diagram of the pipe body of the pipe of the invention.
Fig. 3 is a schematic structural view of the half pipe body of the present invention before molding.
Fig. 4 is a schematic structural view of the half pipe body of the present invention after molding.
In the figure, 1, a half pipe body, 11, a full-face triangular plate, 12, an arc-shaped plate, 13, a half-face triangular plate, 14, a reinforcing rib plate, 15, a transverse reinforcing rib, 2, a connecting flange, 3, a semicircular opening supporting plate, 4 and a lifting lug.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the pipe for the sky-circle and the earth-circle disclosed by the invention comprises two half pipe bodies 1 which are oppositely arranged and connecting flanges 2 which are arranged at two ends of the half pipe bodies 1, wherein one end of each half pipe body 1 is provided with a semicircular opening, the other end of each half pipe body is provided with a vertical U-shaped opening between the side plates, the two half pipe bodies 1 are welded and fixed through side edges, the two half pipe bodies 1 form the sky-circle and earth-circle pipe with the upper end provided with the circular opening and the lower end provided with the rectangular opening, the planes of the openings at the upper end and the lower end are parallel, and the connecting flanges 2 comprise a circular ring at the upper end and a rectangular ring at the lower end which are respectively.
Half body 1 comprises set-square and transition board, wherein the set-square falls into whole set-square 11 and half set-square 13 two kinds, specifically for half body 1 includes whole set-square 11 that one is located the centre, connect arc 12 on whole set-square 11 two sides and connect half set-square 13 on 12 opposite side edges of arc, whole set-square 11, arc 12 and half set-square 13 are integrated into one piece, whole set-square 11 promptly, arc 12 and half set-square 13 are formed by a steel sheet cutting, can one shot forming, two half set-squares 13's that set up on same half body 1 structure is the same, the length of welding side is also the same. The two half pipe bodies 1 are connected through the welding side edges of the half triangular plates 13, so that only two welding seams are formed between the two half pipe bodies 1, the welding amount of the welding seams is minimum, the processing difficulty is low, and time and labor are saved.
All parallel sides outside the side of whole set square 11 and every half set square 13 are provided with deep floor 14, and deep floor 14 on every set square all encloses a triangle-shaped in city, and deep floor 14 has strengthened the overall structure intensity of the local pipe of sky circle, has also strengthened the structural strength and the bending strength of set square side department simultaneously, slows down the deformation volume of half body 1 in set square side department. A12 cm distance is arranged between the reinforcing rib plates 14 on the outer side of the welding joint of the half triangular plate 13 and the side edge of the half triangular plate 13, so that a distance is formed between the reinforcing rib plates 14 of the two half pipe bodies 1, and the welding joint position is reserved at the joint of the two half pipe bodies 1, so that subsequent welding of a welding opening is facilitated. Horizontal strengthening rib 15 of welding between whole set square 11 and half set square 13's inside deep floor 14, horizontal strengthening rib 15 is arranged in parallel to the base of two kinds of set squares, horizontal strengthening rib 105 can further promote half body 1 structural strength and bending strength in set square side department, at the return bend in-process, the deformation that the reduction set square that can be better produced, half body 1 group is to the welding back, can be according to the design demand, select to remain or cut off horizontal strengthening rib 15.
In order to produce the above-mentioned round-sky and square-earth tube, the invention adopts a processing method:
the invention discloses a method for processing a hemispherical dome tube, which comprises the following steps:
step 1: referring to fig. 2, firstly calculating and setting the expansion structure and the size of the semi-pipe body 1, blanking the pipe body according to the structure in the figure, selecting two opposite triangular plates with the shortest center line, dividing the pipe in the hemispherical dome into two parts for blanking by taking the center line of the pair of triangular plates as a boundary, and drawing and marking the intersection line of the triangular plates and the arc-shaped plate 12 after the blanking is finished;
step 2: referring to fig. 3, the whole-face triangular plate 11 and the half-face triangular plate 13 of two parts of blanks of the lower material are welded with reinforcing rib plates 14 for reinforcement, the reinforcing rib plates 14 are arranged along the edges of the whole-face triangular plate 11 and the half-face triangular plate 13 to form a triangular section, transverse reinforcing ribs 15 are welded between the reinforcing rib plates 14 in the same triangular plate, and the transverse reinforcing ribs 15 are arranged in parallel to the bottom edge of the triangular plate;
and step 3: manufacturing accessories: two semicircular opening supporting plates 3 are manufactured according to the inner diameter of a round opening of a pipe in a hemispherical and square shape, the middle of each semicircular opening supporting plate 3 is hollowed to form a through groove, so that the weight of each semicircular opening supporting plate 3 is reduced, at least three pairs of lifting lugs 4 are manufactured at the same time, three pairs are manufactured in the embodiment, the specific number is determined according to the length of the semi-pipe body 1, and the number is increased or decreased appropriately;
and 4, step 4: referring to fig. 3 and 4, a semicircular opening supporting plate 3 and lifting lugs 4 are welded, one side of a reinforced wool reinforcing rib plate 14 faces downwards and is placed on an operation platform, the middle point of the circular arc of the prefabricated semicircular opening supporting plate 3 is aligned with the middle point of the circular opening side of the wool, the semicircular opening supporting plate 3 is spot-welded on the wool, the semicircular opening supporting plate 3 is kept perpendicular to the surface of the wool when the semicircular opening supporting plate 3 is spot-welded on the wool, a pair of lifting lugs 4 are respectively welded at the outer ends of the circular opening side and the square opening side of the wool, a pair of lifting lugs 4 are welded at the outer end of the middle part of the circular opening side and the square opening side of the wool, and the number of the lifting lugs 4 can be increased or decreased according to needs;
and 5: referring to fig. 4, the guide chain is formed by drawing, a set of hand-pulling guide chain is hung on each of the three pairs of lifting lugs 4, the guide chain is pulled from the circular opening side, the middle guide chain and the square opening side guide chain are sequentially pulled along with the increase of the tilting until the circular opening side of the blank completely abuts against the outer edge of the semicircular opening supporting plate 3, the middle circular arc of the arc plate 12 is in smooth transition, the square opening side is in a state that the bottom edges of the two half triangular plates 13 are perpendicular to the bottom edge of the whole triangular plate 11, after the half pipe body 1 is formed, the circular opening side wall plate and the semicircular opening supporting plate 3 are fixed by spot welding, and the square opening side is fixed by using temporary lacing wires;
in order to facilitate the rapid forming of the square opening side, a gap of 5cm is cut at the joint of the whole triangular plate 11 and the half triangular plate 13 at the square opening side, so that the joint of the whole triangular plate 11 and the half triangular plate 13 is easier to bend;
step 6: repeating the steps to manufacture the other half pipe body 1 of the hemispherical dome pipe;
and 7: referring to fig. 1 and 4, the two half pipe bodies 1 which are manufactured are welded in an assembling mode, after the checking that the sizes are correct, flanges 2 are welded on the round opening side and the square opening side, a half opening supporting plate 3 and a lifting lug 4 which are temporarily fixed on the inner sides are cut off, welding spots are polished completely, and manufacturing of the square pipe is completed.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. A kind of Tianyuan Fang guan, characterized by: including two relative half body (1) that set up and flange (2) of setting at half body (1) both ends, half body (1) includes a whole set-square (11), connects arc (12) on two sides of whole set-square (11) and connects half set-square (13) on arc (12) side, connects through half set-square (13) between two half body (1).
2. The pipe of claim 1, wherein: the whole set square (11), the arc-shaped plate (12) and the half set square (13) on the same half pipe body (1) are formed into an integral structure.
3. The pipe of claim 1, wherein: the two half-surface triangular plates (13) on the same half pipe body (1) have the same structure.
4. The pipe of claim 1, wherein: and reinforcing rib plates (14) are arranged on the outer sides of the side edges of the whole triangular plate (11) and the half triangular plate (13) in parallel.
5. The pipe of claim 1, wherein: and a distance of 1-5cm is arranged between the reinforcing rib plate (14) at the outer side of the joint of the two adjacent half-face triangular plates (13) and the side edge of the half-face triangular plate (13).
6. A processing method of a hemispherical dome tube is characterized by comprising the following steps:
step 1: blanking the pipe body, selecting two opposite triangular plates with the shortest central line, dividing the hemispherical dome pipe into two parts for blanking by taking the central line of the pair of triangular plates as a boundary, and drawing and marking the intersection line of the triangular plates and the arc-shaped plate (12) after the blanking is finished;
step 2: welding reinforcing rib plates (14) on the whole triangular plate (11) and the half triangular plate (13) of the two parts of blanks of the fed materials for reinforcing, wherein the reinforcing rib plates (14) are arranged along the edges of the whole triangular plate (11) and the half triangular plate (13);
and step 3: manufacturing accessories: manufacturing two semicircular opening plates (3) according to the inner diameter of a circular opening of a pipe in a round top and a square bottom, and manufacturing at least three pairs of lifting lugs (4);
and 4, step 4: welding a semicircular opening supporting plate (3) and lifting lugs (4), placing a reinforced blank on an operation platform downwards according to one side of a reinforcing rib plate (14), aligning the middle point of the circular arc of the prefabricated semicircular opening supporting plate (3) with the middle point of the circular opening side of the blank, spot-welding the semicircular opening supporting plate (3) on the blank, respectively welding a pair of lifting lugs (4) at the outer ends of the circular opening side and the square opening side of the blank, and then welding a pair of lifting lugs (4) at the positions, close to the circular opening end, of the outer ends of the middle part of the circular opening side and the square opening side of the blank;
and 5: the guide chain is drawn and formed, a set of hand-pulling guide chain is hung on each of the three pairs of lifting lugs (4), the guide chain is pulled from the circular opening side, the middle guide chain and the square opening side guide chain are sequentially pulled along with the increase of the tilting until the circular opening side of the blank completely leans against the outer edge of the semicircular opening supporting plate (3), the middle circular arc of the arc-shaped plate (12) is in smooth transition, the square opening side is in a state that the bottom edges of the two semicircular triangular plates (13) are perpendicular to the bottom edge of the whole triangular plate (11), after forming, the circular opening side wall plate and the semicircular opening supporting plate (3) are fixed in a spot welding mode, and the square opening side is fixed in a spot welding mode through temporary pull ribs;
step 6: repeating the steps to manufacture the other half pipe body (1) of the hemispherical dome;
and 7: the group is to the welding, and two half body (1) group that will make the completion are to the welding, and the check is checked the size and is correct the back, at round mouth side and square mouth side welded connection flange (2), cuts off inboard half-support mouth board (3) and lug (4) of fixing temporarily, and the solder joint is polished totally, has accomplished the preparation of sky circle local place pipe promptly.
7. The method for processing the pipe with the hemispherical dome shape according to claim 6, wherein the method comprises the following steps: and the step 2 also comprises the step of welding transverse reinforcing ribs (15) between reinforcing rib plates (14) in the two triangular plates, wherein the transverse reinforcing ribs (15) are arranged in parallel to the bottom edges of the triangular plates.
8. The method for processing the pipe with the hemispherical dome shape according to claim 6, wherein the method comprises the following steps: and in the step 4, the semi-circular opening-supporting plate (3) is kept vertical to the surface of the wool when being spot-welded on the wool.
9. The method for processing the pipe with the hemispherical dome shape according to claim 6, wherein the method comprises the following steps: and in the step 5, a gap of 3-5cm is cut at the joint of the whole triangular plate (11) and the half triangular plate (13) at the square opening side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010225771.6A CN111365543B (en) | 2020-03-26 | 2020-03-26 | Round-top square tube and processing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010225771.6A CN111365543B (en) | 2020-03-26 | 2020-03-26 | Round-top square tube and processing method thereof |
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| CN111365543A true CN111365543A (en) | 2020-07-03 |
| CN111365543B CN111365543B (en) | 2021-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331317A (en) * | 2020-01-17 | 2020-06-26 | 中国一冶集团有限公司 | Method for manufacturing hemispherical dome-shaped and square-shaped connecting piece |
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| CN111331317A (en) * | 2020-01-17 | 2020-06-26 | 中国一冶集团有限公司 | Method for manufacturing hemispherical dome-shaped and square-shaped connecting piece |
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| CN111365543B (en) | 2021-06-25 |
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