CN114633078B - Method for manufacturing metal corrugated pipe - Google Patents
Method for manufacturing metal corrugated pipe Download PDFInfo
- Publication number
- CN114633078B CN114633078B CN202210375813.3A CN202210375813A CN114633078B CN 114633078 B CN114633078 B CN 114633078B CN 202210375813 A CN202210375813 A CN 202210375813A CN 114633078 B CN114633078 B CN 114633078B
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- China
- Prior art keywords
- manufacturing
- forming
- frame body
- pipe fitting
- metal bellows
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002184 metal Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 14
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
- B21D13/02—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by pressing
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/021—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube having a rectangular cross-section
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a manufacturing method of a metal corrugated pipe, which comprises the steps of placing a pipe fitting in a closed and detachable forming frame body, wherein the inner wall of the forming frame body is provided with a plurality of layers of forming grooves for forming corrugations; a roller wheel matched with the forming groove is placed in the pipe fitting and moves along the forming groove to extrude the pipe fitting, and the pipe fitting is extruded and formed into a corrugated pipe through the roller wheel; and disassembling the molding frame body and taking out the corrugated pipe. Compared with the existing manufacturing method that four sides are formed independently and then welded and fixed, the method can obtain a complete corrugated structure through one-time rolling forming, is simpler in steps and higher in processing efficiency, is beneficial to reducing the number of welding seams, and further can reduce the problems of welding stress concentration and welding seam cracking.
Description
Technical Field
The present invention relates to a method for manufacturing a tube, and more particularly, to a method for manufacturing a corrugated metal tube.
Background
The tunnel sterilizing dryer box body is connected with the box body by a rectangular expansion ring so as to buffer the deformation of the box body in a high-temperature environment. At present, four sides of a commonly used rectangular expansion ring are independently formed, and then four-sided corrugated pipes are welded together to form the rectangular expansion ring.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art, and provides the metal corrugated pipe manufacturing method which is simple in steps, beneficial to improving the processing efficiency, reducing the number of welding seams and reducing the cracking probability.
In order to solve the technical problems, the invention adopts the following technical scheme:
a metal corrugated pipe manufacturing method comprises the steps of placing a pipe fitting in a closed and detachable forming frame body, wherein a plurality of layers of forming grooves for forming corrugations are formed in the inner wall of the forming frame body; a roller wheel matched with the forming groove is placed in the pipe fitting and moves along the forming groove to extrude the pipe fitting, and the pipe fitting is extruded and formed into a corrugated pipe through the roller wheel; and disassembling the molding frame body and taking out the corrugated pipe.
As a further improvement of the above technical scheme: bending a strip plate to enable two ends to be butted and welded and fixed to form the pipe fitting.
As a further improvement of the above technical scheme: and two ends of the plate are welded by laser.
As a further improvement of the above technical scheme: and the roller wheels are sequentially roll-formed from bottom to top according to the set track and each circle of displacement.
As a further improvement of the above technical scheme: and cutting the two end surfaces of the corrugated pipe to be flat after the corrugated pipe is taken out.
As a further improvement of the above technical scheme: the molding frame body comprises more than two groups of mold split bodies, and a positioning structure is arranged between the mold split bodies and detachably connected with the mold split bodies.
As a further improvement of the above technical scheme: the die split comprises a plurality of laminated layers, and the forming grooves are formed in each laminated layer.
As a further improvement of the above technical scheme: the positioning structure comprises positioning grooves formed in one group of the lamination layers of the die split bodies and positioning convex parts formed in the other group of the lamination layers of the die split bodies, and the positioning convex parts are arranged in the positioning grooves in a one-to-one correspondence mode.
As a further improvement of the above technical scheme: connecting parts are arranged at two ends of the laminated layers, and fasteners are arranged in the connecting parts in a penetrating mode.
As a further improvement of the above technical scheme: the cross section of the pipe fitting is rectangular, square or round, and the forming frame body is a rectangular frame body, a square frame body or a round frame body.
Compared with the prior art, the invention has the advantages that: according to the manufacturing method of the metal corrugated pipe, disclosed by the invention, the pipe fitting is placed in the forming frame body with the forming groove, the forming frame body is utilized to provide constraint for the pipe fitting, and then the roller is utilized to move along the forming groove and extrude the pipe fitting, so that a whole circle of corrugated structure can be obtained on the pipe fitting, and the corrugated pipe can be taken out after the forming frame body is disassembled.
Drawings
Fig. 1 is a schematic perspective view of a method for manufacturing a metal bellows according to the present invention.
Fig. 2 is a schematic perspective view of a molded frame according to the method of manufacturing a corrugated metal pipe of the present invention.
Fig. 3 is a partial enlarged view of fig. 2.
Fig. 4 is a schematic structural view of a plate material according to the manufacturing method of the metal bellows of the present invention.
Fig. 5 is a schematic top view of a tube member according to the method of manufacturing a corrugated metal tube of the present invention.
Fig. 6 is a schematic diagram showing a front view of a tube member according to the method of manufacturing a metal bellows of the present invention.
Fig. 7 is a schematic perspective view of a finished metal bellows product manufactured by the present invention.
The reference numerals in the drawings denote: 1. a sheet material; 2. a pipe fitting; 21. welding seams; 3. a roller; 4. the mould is split; 41. laminating; 42. a positioning groove; 43. positioning convex parts; 44. a connection part; 5. forming a frame; 51. forming a groove; 6. a connecting flange; 61. and a bending part.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples of the specification.
Fig. 1 to 6 show an embodiment of a metal bellows manufacturing method of the present invention, in which a pipe 2 is placed in a closed and detachable forming frame 5, the inner wall of the forming frame 5 is provided with a plurality of layers of forming grooves 51 for forming the bellows (the specific number of layers is determined according to the design bellows number of the metal bellows); placing a roller 3 matched with the forming groove 51 in the pipe fitting 2 and moving along the forming groove 51 to extrude the pipe fitting 2, wherein the pipe fitting 2 is extruded and formed into a corrugated pipe through the roller 3; and the corrugated pipe is taken out after the forming frame body 5 is disassembled. Preferably, the forming frame 5 is fixed on a working platform of the hydraulic machine, and correspondingly, the roller 3 adopts the hydraulic machine to provide power. In this embodiment, the cross section of the pipe fitting 2 is rectangular, the corresponding forming frame 5 is a rectangular frame, and a rectangular metal corrugated pipe can be processed and can be used between the tunnel sterilizing dryer box and the box. Of course, in other embodiments, if a corrugated pipe with a square or circular cross section is required to be machined, the cross section of the pipe 2 may also be square or circular, and correspondingly, the formed frame 5 is a square frame or a circular frame.
According to the manufacturing method of the metal corrugated pipe, the pipe fitting 2 is placed in the forming frame body 5 with the forming groove 51, the forming frame body 5 is used for providing constraint for the pipe fitting 2, then the roller 3 is used for moving along the forming groove 51 and extruding the pipe fitting 2, so that a whole circle of corrugated structure can be obtained on the pipe fitting 2, the corrugated pipe can be taken out after the forming frame body 5 is disassembled, and compared with the existing manufacturing method that four sides are independently formed and then welded and fixed, the manufacturing method of the metal corrugated pipe is capable of obtaining a whole circle of complete corrugated structure through one-time rolling forming, the steps are simpler, the processing efficiency is higher, the number of welding seams is reduced, and the welding stress concentration and the welding seam cracking problem can be reduced.
Further, in this embodiment, a strip plate 1 is bent to butt-joint and weld-fix two ends to form the pipe 2. The strip-shaped plate 1 is adopted to bend the two ends to be butted and welded for fixation, so that the closed pipe fitting 2 with various cross-section shapes can be obtained, the flexibility is good, the application range is wide, only one welding seam is generated, and the problems of welding stress concentration and welding seam cracking are reduced.
As a preferred embodiment, the sheet material 1 is laser welded at both ends. Adopt laser welding, be favorable to guaranteeing welding strength, guarantee the connection reliability at panel 1 both ends, prevent the welding crack.
As a preferred embodiment, the roller 3 sequentially rolls and forms from bottom to top according to a set track and each circle of displacement, the pipe 2 is placed in the forming frame 5, the bottom of the pipe 2 and the bottom of the forming frame 5 are limited by the processing platform to be in the same plane, therefore, the top of the pipe 2 exceeds the upper surface of the forming frame 5, when the roller 3 moves from bottom to top, the top of the pipe 2 gradually decreases in height, for example, moves from top to bottom or moves from middle, the top of the pipe 2 will not decrease or the decrease is insufficient, and one end of the finally formed corrugated pipe is not processed.
Further, in this embodiment, after the corrugated pipe is taken out, the two end faces of the corrugated pipe are cut and flattened, so that the problem that the two end faces of the corrugated pipe are possibly uneven after the corrugated structure is formed on the plate 1 can be solved, and the final processing quality of the metal corrugated pipe can be guaranteed.
Preferably, as shown in fig. 7, the connecting flanges 6 may be welded at two ends of the corrugated pipe, so as to facilitate the flange connection between the metal corrugated pipe and the connected object (such as the above-mentioned box), and further, bending portions 61 bending toward the middle of the metal corrugated pipe may be provided around the connecting flanges 6, which is helpful for improving the mechanical strength of the connecting flanges 6.
Further, in this embodiment, the molding frame 5 includes two sets of mold split bodies 4, and a positioning structure is provided between the mold split bodies 4 and detachably connected. When the corrugated pipe is required to be taken out, the connection between the two groups of die split bodies 4 is firstly disconnected, and the corrugated pipe is simple in structure and convenient to use; the positioning structure is helpful to ensure accurate positioning between the two groups of mold split bodies 4, and further ensure the size and shape precision of the formed frame body 5 obtained by connection. Of course, in other embodiments, the number of the mold split bodies 4 can be further increased, and the mold split bodies can be detachably connected in pairs.
Further, in the present embodiment, the mold split 4 includes a plurality of stacked layers 41, and each stacked layer 41 is provided with a molding groove 51. By increasing or decreasing the number of the laminated layers 41, the height of the corrugated pipe or the axial length of the corrugated pipe can be adjusted, so that the corrugated pipe is more flexible and convenient to use.
As a preferred embodiment, the positioning structure includes positioning grooves 42 provided on the stack 41 of one set of the mold split bodies 4, and positioning protrusions 43 provided on the stack 41 of the other set of the mold split bodies 4, and each positioning protrusion 43 is provided in each positioning groove 42 in a one-to-one correspondence. Such a positioning structure is simple and reliable, and can effectively prevent misalignment between the stacked layers 41 when pressed by the roller 3.
Further, in the present embodiment, the two ends of the laminate 41 are provided with connection portions 44 (e.g., through grooves, connection rings, threaded holes, etc.), and fasteners (not shown in the figure, for example, bolts, screws, etc.) are inserted into the connection portions 44. The lamination 41 in the two sets of mold split bodies 4 can be effectively connected into a whole through the fastener and the connecting part 44, and the two sets of mold split bodies can be prevented from being separated from each other when being extruded by the roller 3, and the structure is simple and reliable.
While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (10)
1. A method for manufacturing a metal bellows, characterized by: placing a pipe fitting (2) in a closed and detachable forming frame body (5), wherein a plurality of layers of forming grooves (51) for forming corrugation are formed in the inner wall of the forming frame body (5); a roller (3) matched with the forming groove (51) is arranged in the pipe fitting (2) and moves along the forming groove (51) to extrude the pipe fitting (2), and the pipe fitting (2) is extruded and formed into a corrugated pipe through the roller (3); and disassembling the molding frame body (5) and taking out the corrugated pipe.
2. A method of manufacturing a metal bellows according to claim 1, characterized in that: bending a strip plate (1) to enable two ends to be butted and welded and fixed to form the pipe fitting (2).
3. A method of manufacturing a metal bellows according to claim 2, characterized in that: and two ends of the plate (1) are welded by laser.
4. A method of manufacturing a metal bellows according to claim 1, wherein: the roller (3) is sequentially rolled and formed from bottom to top according to a set track and displacement of each circle.
5. A method of manufacturing a metal bellows according to claim 1, characterized in that: and cutting the two end surfaces of the corrugated pipe to be flat after the corrugated pipe is taken out.
6. A method of manufacturing a metal bellows according to any one of claims 1 to 5, characterized in that: the molding frame body (5) comprises more than two groups of mold split bodies (4), and positioning structures are arranged between the mold split bodies (4) and are detachably connected.
7. The method of manufacturing a metal bellows according to claim 6, wherein: the die split body (4) comprises a plurality of laminated layers (41), and the forming grooves (51) are formed in each laminated layer (41).
8. The method of manufacturing a metal bellows according to claim 6, wherein: the positioning structure comprises positioning grooves (42) formed in the lamination layers (41) of one group of the die split bodies (4) and positioning convex parts (43) formed in the lamination layers (41) of the other group of the die split bodies (4), and the positioning convex parts (43) are correspondingly arranged in the positioning grooves (42) one by one.
9. The method of manufacturing metal bellows according to claim 7, wherein: connecting parts (44) are arranged at two ends of the laminated layers (41), and fasteners are arranged in the connecting parts (44) in a penetrating mode.
10. A method of manufacturing a metal bellows according to any one of claims 1 to 5, characterized in that: the cross section of the pipe fitting (2) is rectangular, square or round, and the forming frame body (5) is a rectangular frame body, square frame body or round frame body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210375813.3A CN114633078B (en) | 2022-04-11 | 2022-04-11 | Method for manufacturing metal corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210375813.3A CN114633078B (en) | 2022-04-11 | 2022-04-11 | Method for manufacturing metal corrugated pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114633078A CN114633078A (en) | 2022-06-17 |
| CN114633078B true CN114633078B (en) | 2023-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210375813.3A Active CN114633078B (en) | 2022-04-11 | 2022-04-11 | Method for manufacturing metal corrugated pipe |
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| Country | Link |
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| CN (1) | CN114633078B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298453C (en) * | 2004-08-31 | 2007-02-07 | 中国船舶重工集团公司第七二五研究所 | Method for producing integrally formed disc shape corrugated pipe |
| DE102006005736A1 (en) * | 2006-02-07 | 2007-08-09 | Thyssenkrupp Presta Ag | corrugated pipe |
| JP2008157315A (en) * | 2006-12-21 | 2008-07-10 | Yutaka Giken Co Ltd | Method and device for manufacturing metal bellows |
| CN107013766A (en) * | 2017-05-25 | 2017-08-04 | 江苏省埃迪机电设备实业有限公司 | A kind of waveform is corrugated metal bellows |
| CN206875025U (en) * | 2017-07-10 | 2018-01-12 | 安岩晨 | A kind of 3 waveform bellows and the mould for being processed into compensator |
| CN111672928B (en) * | 2020-06-11 | 2022-03-18 | 西安石油大学 | Novel method for compositely forming metal corrugated pipe with special-shaped contour |
| CN112355108B (en) * | 2020-10-23 | 2022-06-17 | 南京德邦金属装备工程股份有限公司 | Forming method of large-caliber corrugated pipe expansion joint |
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2022
- 2022-04-11 CN CN202210375813.3A patent/CN114633078B/en active Active
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| Publication number | Publication date |
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| CN114633078A (en) | 2022-06-17 |
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Application publication date: 20220617 Assignee: Changsha Pharmaceutical Equipment Industrial Technology Research Institute Co.,Ltd. Assignor: TRUKING TECHNOLOGY Ltd. Contract record no.: X2023980051833 Denomination of invention: A manufacturing method for metal corrugated pipes Granted publication date: 20230516 License type: Common License Record date: 20231213 |
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