CN102172664A - Flexible manufacturing method of thin-wall complex bent pipes - Google Patents
Flexible manufacturing method of thin-wall complex bent pipes Download PDFInfo
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- CN102172664A CN102172664A CN2010106166394A CN201010616639A CN102172664A CN 102172664 A CN102172664 A CN 102172664A CN 2010106166394 A CN2010106166394 A CN 2010106166394A CN 201010616639 A CN201010616639 A CN 201010616639A CN 102172664 A CN102172664 A CN 102172664A
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Abstract
The invention discloses a flexible manufacturing method of thin-wall complex bent pipes. The method comprises the following steps: dividing a bent pipe into two workpieces in mirror symmetry, calculating an extension drawing of the two workpieces, and reserving appropriate flanging quantity; welding line and process supplementary region used for pressurization, mounting a pipe joint (1) used for pressurization on one workpiece; and pressurizing and bulging with gas or liquid by virtue of the pipe joint (1) after direct butt welding or flanging welding is carried out on the two workpieces, or correcting shape by utilizing a local bulging tool directly or manually, wherein the bent pipe can be composed of one section or multiple sections, also can be a special pipe or variable-cross-section pipe and also can be a variable-bend-radius pipe. The flexible manufacturing method of the thin-wall complex bent pipe can be used for changing the processing mode of bent pipe die moulding, flexible manufacturing of the thin-wall bent pipe in a complex shape can be realized, and the production cost can be reduced.
Description
Technical field
The invention discloses a kind of flexible manufacturing method of thin-wall complicated bend pipe, relate to a kind of pipe type element plastic molding method, belong to mechanical engineering field.
Background technology
Thin-winding pipe is extensive in the use of industry-by-industry, and industries such as Aero-Space, boats and ships naval vessels, automobile, heat exchanger, building all be unable to do without a large amount of uses of thin-winding pipe.Thin-winding pipe is in light weight, can save material, alleviates product weight, thereby obtains application more and more widely in the pipe network system that install the locus.Existing bending tube forming technology generally relies on mould or is divided into two workpiece and is formed separately the back welding, but when shaping thin-walled straight tube, usually produce that unstability is wrinkling, defective such as cross section distortion and wall thickness excessive thinning, especially be difficult to realize the shaping of thin-wall complicated bend pipe.Bend pipe, special pipe, the varying cross-section duct that is made of two sections or multistage and the pipe type element of the radius that buckles all do not have suitable manufacture method.
Summary of the invention
The objective of the invention is to change the processing mode that bend pipe mould is shaped, a kind of thin-wall complicated efficiently bend pipe flexible manufacturing method is provided, realize the flexible manufacturing of the complicated shape thin-winding pipe class part of one or more snippets bend pipe, special pipe, varying cross-section duct or the radius that buckles, reduce production costs, satisfy the needs of industries such as Aero-Space, boats and ships naval vessels, automobile, heat exchanger, building.The flexible manufacturing method of thin-wall complicated bend pipe of the present invention, bend pipe is divided into two workpiece of mirror image symmetry, calculate the expanded view of two workpiece, and reserve suitable flange amount, weld seam and pressurising and use technology additional area territory, and on a workpiece pressurising pipe joint 1 is installed therein, after two direct butt welding of workpiece or flange welding, using gases or liquid are by pipe joint 1 pressurising bulging, or pressurising is not installed with pipe joint 1, directly use local bulging instrument or manual correction of the flank shape.
Above-mentioned purpose of the present invention is achieved through the following technical solutions, and accompanying drawings is as follows:
A kind of flexible manufacturing method of thin-wall complicated bend pipe is characterized in that, may further comprise the steps:
The position-limit mechanism that adopts in the described step 3 is made up of mould or limiting plate 4, is positioned at bending tube forming spare 5 both sides, and the gap between the position-limit mechanism can be adjusted.
Described mould is made up of entity mould 6 or multipoint digital flexible die 7, when being made up of multipoint digital flexible die 7, divides progressively bulging of multi-pass.
A kind of flexible manufacturing method of thin-wall complicated bend pipe may further comprise the steps:
The flexible manufacturing method of described thin-wall complicated bend pipe is characterized in that described bend pipe is made of one or more snippets, bend pipe or special pipe or varying cross-section duct, or the pipe type element of the radius that buckles.
For the high-quality of the thin-winding pipe of realizing complicated shape is shaped, reduce production costs, satisfy the needs of industries such as Aero-Space, boats and ships naval vessels, automobile, heat exchanger, building, the invention provides a kind of flexible manufacturing method of thin-wall complicated bend pipe efficiently.The flexible manufacturing method of thin-wall complicated bend pipe provided by the invention, bend pipe is divided into two workpiece of mirror image symmetry, calculate the expanded view of two workpiece, and reserve suitable flange amount, weld seam and pressurising and use technology additional area territory, and on a workpiece pressurising pipe joint 1 is installed therein, pipe joint is fixing by locking nut 2, can use sealing gasket 3 between pipe joint 1 and the workpiece; After again two workpiece being adopted Laser Welding, argon arc welding or the direct butt welding of other welding manner or flange welding, using gases or liquid are by pipe joint 1 pressurising bulging.Bend pipe can be made of one or more snippets, can also be special pipe or varying cross-section duct, also can be the pipe of radius of buckling.When adopting gas or liquid, can realize mouldless shaping, shorten the manufacturing cycle and the cost saving of the thin-winding pipe of complicated shape, realize its green manufacturing by pipe joint 1 pressurising bulging.Certainly, also bend pipe can be divided into two workpiece of mirror image symmetry, calculate the expanded view of two workpiece, and reserve suitable weld seam and flange amount, after two direct butt welding of workpiece or flange welding, use local bulging instrument or manual correction of the flank shape.Defectives such as unstability is wrinkling in order to suppress in the thin-winding pipe bulging process, cross section distortion and wall thickness excessive thinning can be used position-limit mechanism in the bending tube forming process; Position-limit mechanism is made up of mould or limiting plate 4, is positioned at bending tube forming spare 5 both sides, and the gap between the position-limit mechanism can be adjusted by forcing press or other frock.When position-limit mechanism uses mould, can form by entity mould 6 or multipoint digital flexible die 7; When forming, can divide progressively bulging of multi-pass by multipoint digital flexible die 7; Use urethane pad 8 in the forming process, can prevent impression and wrinkling.The inventive method can simply realize the monolithic molding of the pipe type element of a row or multi-row UNICOM.The convenience that the thin-wall complicated bend pipes that are coupled to each other for the many rows after guaranteeing to be shaped are a plurality of are installed also can directly weld and bulging two uncut symmetrical plates.
Description of drawings
Fig. 1 has the butt welding schematic diagram of pressurising with the thin-walled multistage bend pipe of pipe joint; Wherein Fig. 1 (a) is an overall diagram, and Fig. 1 (b) is the A-A sectional view.
Fig. 2 has the flange welding schematic diagram of pressurising with the thin-walled multistage bend pipe of pipe joint; Wherein Fig. 2 (a) is an overall diagram, and Fig. 2 (b) is the A-A sectional view.
Fig. 3 be thin-walled multistage bend pipe to the weldment bulging after schematic diagram; Wherein Fig. 3 (a) is an overall diagram, and Fig. 3 (b) is the A-A sectional view.
Fig. 4 is a schematic diagram after thin-walled multistage bend pipe flange weldment is shaped; Wherein Fig. 4 (a) is an overall diagram, and Fig. 4 (b) is the A-A sectional view.
Fig. 5 is the thin-walled multistage bend pipe postwelding schematic diagram of both ends open; Wherein Fig. 5 (a) is to weldment, and Fig. 5 (b) is the flange weldment.
Fig. 6 is a schematic diagram behind the thin-walled multistage bending tube forming; Wherein Fig. 6 (a) is to weldment, and Fig. 6 (b) is the flange weldment.
Fig. 7 is a thin-walled multistage bending tube forming schematic diagram when using limiting plate; Wherein Fig. 7 (a) is an overall diagram, and Figure 76 (b) is the A-A sectional view.
Fig. 8 is a thin-walled multistage bending tube forming schematic diagram when using the entity mould spacing; Wherein Fig. 8 (a) is an overall diagram, and Fig. 8 (b) is the A-A sectional view.
Fig. 9 is a thin-wall complicated bending tube forming schematic diagram when using the multipoint digital mould spacing; After wherein Fig. 9 (a) is the bulging first time, after Fig. 9 (b) is the bulging second time, after Fig. 9 (c) is final bulging.
Figure 10 is a schematic diagram behind the thin-wall complicated bending tube forming; Wherein Figure 10 (a) is the rectangle special pipe, and 10 (b) are the hexagon special pipe, and 10 (c) are varying cross-section duct, and 10 (d) are the radius pipe that buckles.
Figure 11 is a schematic diagram after many row's thin-winding pipes are shaped; Wherein Figure 11 (a) is the continuous thin-winding pipes of a kind of three rows, and Figure 11 (b) is the continuous thin-winding pipes of six rows.
Among the figure, 1, pipe joint; 2, locking nut; 3, sealing gasket; 4, limiting plate; 5, bending tube forming spare; 6, the entity mould; 7, the multipoint digital flexible die; 8, urethane pad.
The specific embodiment
Further specify the particular content of the present invention and the course of work below in conjunction with the accompanying drawing illustrated embodiment.
The flexible manufacturing method of a kind of thin-wall complicated bend pipe of the present invention, adopt following concrete steps: two workpiece that bend pipe are divided into the mirror image symmetry, calculate the expanded view of two workpiece, and reserve suitable flange amount, weld seam and pressurising and use technology additional area territory, and on a workpiece pressurising pipe joint 1 is installed therein, after two direct butt welding of workpiece or flange welding, using gases or liquid are by pipe joint 1 pressurising bulging; Bend pipe can be made of one or more snippets, can also be special pipe or varying cross-section duct, also can be the pipe type element of radius of buckling.
Bend pipe is divided into two workpiece of mirror image symmetry, calculates the expanded view of two workpiece, and reserve suitable flange amount and weld seam, after two direct butt welding of workpiece or flange welding, use local bulging instrument or manual correction of the flank shape.
In bend pipe pressurising bulging process, use position-limit mechanism; Position-limit mechanism is made up of mould or limiting plate 4, is positioned at bending tube forming spare 5 both sides, and the gap between the position-limit mechanism can be adjusted by forcing press or other frock.
The mould that position-limit mechanism uses is made up of entity mould 6 or multipoint digital flexible die 7; When forming, can divide progressively bulging of multi-pass by multipoint digital flexible die 7.
Fig. 1 has the butt welding schematic diagram of pressurising with the thin-walled multistage bend pipe of pipe joint.At first thin-wall complicated bend pipe is divided into two workpiece of mirror image symmetry, calculates the expanded view of two workpiece; After reserving suitable weld seam and pressurising usefulness technology additional area territory again according to the size of workpiece expanded view then, the cutting plate obtains two workpiece, and on a workpiece pressurising pipe joint 1 is installed therein, pipe joint is fixing by locking nut 2, can use sealing gasket 3 between pipe joint 1 and the workpiece; Adopt two workpiece Laser Welding, argon arc welding or other welding manner directly to postwelding again, using gases or liquid are by pipe joint 1 pressurising bulging.Certainly, also can adopt flange welding manner shown in Figure 2 to weld.When adopting the flange welding manner, need size according to the workpiece expanded view, after the suitable flange amount of reservation, weld seam and pressurising are with technology additional area territory, cutting plate and flange welding.Certainly, welding manner can adopt butt welding or flange weldering any other welding manner in addition.Have pressurising with the thin-walled multistage bend pipe butt welding of pipe joint 1 and flange welder part bulging after schematic diagram respectively as shown in Figure 3 and Figure 4.After cutting process is carried out at bulging spare two ends, can obtain needed thin-wall complicated bending tube forming spare.When adopting gas or liquid, can realize mouldless shaping, shorten the manufacturing cycle of the thin-winding pipe of complicated shape, save manufacturing cost, realize the green manufacturing of the thin-winding pipe of one or more snippets complicated shape by pipe joint 1 pressurising bulging.
Fig. 5 is the thin-walled multistage bend pipe welding back schematic diagram of both ends open.Pressurising is not installed when using pipe joint, still, after reserving suitable weld seam, thin-wall complicated bending tube forming is cut with plate according to the size of workpiece expanded view; Two workpiece after will cutting again adopt the butt welding mode shown in Fig. 5 (a) to weld; Use local bulging instrument or manual correction of the flank shape to finish of the shaping of thin-wall complicated bend pipe at last to weldment.Certainly, equally also can adopt the flange welding manner shown in Fig. 5 (b) to weld.When adopting the flange welding manner, need size, after reserving suitable flange amount and weld seam, thin-wall complicated bending tube forming cut with flange with plate weld according to the workpiece expanded view.Welding manner equally also can adopt butt welding or turn over all over any other welding manner beyond the welding.Schematic diagram as shown in Figure 6 behind the thin-wall complicated bending tube forming of both ends open.Do not need to carry out processing such as cutting tip behind the bending tube forming that this method is shaped, can realize the flexible manufacturing of the thin-winding pipe of one or more snippets complicated shape equally.
Thin-walled multistage bending tube forming schematic diagram when Fig. 7 is to use limiting plate.Generation of defects such as unstability is wrinkling in order to suppress in the thin-winding pipe forming process, cross section distortion and wall thickness excessive thinning are used limiting plate 4 in the bending tube forming process; Limiting plate 4 is positioned at bending tube forming spare 5 both sides, and its gap can be adjusted by forcing press adjustment or other frock.For obtaining better forming effect, also can use entity mould 6 shown in Figure 8 or multipoint digital flexible die 7 shown in Figure 9; When using multipoint digital flexible die 7, can divide three passages shown in Fig. 9 (a), Fig. 9 (b) and Fig. 9 (c) to carry out thin-wall complicated bend pipe bulging, all use urethane pad 8 in each passage bulging process, urethane pad 8 can prevent impression and wrinkling; Choosing by the bulging rear tubular member size of correspondence of mould shape face calculated and determined.Also can divide three passages any passage in addition to carry out bulging when certainly, using multipoint digital flexible die 7 bulgings.
Figure 10 is a schematic diagram behind the thin-wall complicated bending tube forming.Adopt the flexible manufacturing method of thin-wall complicated bend pipe of the present invention, in conjunction with to entity mould 6 or multipoint digital flexible die 7, rectangle and the hexagon special pipe shown in Figure 10 (a) or 10 (b) that can be shaped, the radius pipe that buckles shown in the varying cross-section duct shown in Figure 10 (c) or Figure 10 (d) can also be shaped; Thereby for bend pipe, special pipe, varying cross-section duct and the radius pipe that buckles that is made of two sections or multistage provides suitable manufacture method.Certainly the special pipe cross sectional shape can also be pentagon or other shape, and the sectional dimension of varying cross-section duct can also be selected other arbitrary dimension, and the radius pipe that buckles also can be selected other any radius.
Figure 11 is a schematic diagram after many row's thin-winding pipes are shaped.Adopt the inventive method simply to be shaped thin-winding pipe that the row of three shown in Figure 11 (a) is coupled to each other; The convenience that the thin-wall complicated bend pipe that is coupled to each other for the many rows after guaranteeing to be shaped is installed, also the size that can directly determine with technology additional area territory according to expanded view, weld seam and the pressurising of workpiece two uncut symmetrical plates is welded, thus the thin-winding pipe that six rows of shaping shown in Figure 11 (b) are coupled to each other.Certainly, row's number of thin-wall complicated bend pipe and number can be arbitrary value, and pressurising also can be installed in the optional position according to the workpiece needs with the position of pipe joint.
Claims (5)
1. the flexible manufacturing method of a thin-wall complicated bend pipe is characterized in that, may further comprise the steps:
Step 1 is divided into two workpiece of mirror image symmetry with the preformed bend pipe, calculates the expanded view of two workpiece, and reserves suitable flange amount, weld seam and pressurising with technology additional area territory;
Step 2 is installed pressurising with pipe joint (1), then two direct butt welding of workpiece or flange welding on a workpiece therein;
Step 3 is passed through pipe joint (1) pressurising bulging with gas or liquid, uses position-limit mechanism spacing to bend pipe preformed shape in the bulging process.
2. the flexible manufacturing method of thin-wall complicated bend pipe according to claim 1, it is characterized in that, the position-limit mechanism that adopts in the described step 3 is made up of mould or limiting plate (4), is positioned at bending tube forming spare (5) both sides, and the gap between the position-limit mechanism can be adjusted.
3. the flexible manufacturing method of thin-wall complicated bend pipe according to claim 2, it is characterized in that, described mould is made up of entity mould (6) or multipoint digital flexible die (7), when forming, divides progressively bulging of multi-pass by multipoint digital flexible die (7).
4. the flexible manufacturing method of a thin-wall complicated bend pipe is characterized in that, may further comprise the steps:
Step 1 is divided into two workpiece of mirror image symmetry with the preformed bend pipe, calculates the expanded view of two workpiece, and reserves suitable flange amount and weld seam;
Step 2 is two direct butt welding of workpiece or flange welding;
Step 3 is used local bulging instrument or manual correction of the flank shape.
5. according to the flexible manufacturing method of claim 1 or 4 described thin-wall complicated bend pipes, it is characterized in that described bend pipe is made of one or more snippets, bend pipe or special pipe or varying cross-section duct, or the pipe type element of the radius that buckles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106166394A CN102172664A (en) | 2010-12-31 | 2010-12-31 | Flexible manufacturing method of thin-wall complex bent pipes |
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| CN2010106166394A CN102172664A (en) | 2010-12-31 | 2010-12-31 | Flexible manufacturing method of thin-wall complex bent pipes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962308A (en) * | 2012-12-07 | 2013-03-13 | 哈尔滨工业大学 | Special internal high pressure shaping method for thin-wall welded shell |
| CN104668905A (en) * | 2014-12-31 | 2015-06-03 | 黄胜 | Manufacturing method for multidimensional curved conical tube |
| CN108143267A (en) * | 2016-12-06 | 2018-06-12 | 广东美的生活电器制造有限公司 | The manufacturing method of the liner of liner, heating vessel and heating vessel |
| CN109746635A (en) * | 2017-11-08 | 2019-05-14 | 上海宝冶集团有限公司 | Major diameter hyperbolic irregularly passes through production method of the mouth with bend pipe abnormity component |
| CN113319150A (en) * | 2021-06-03 | 2021-08-31 | 哈尔滨工业大学 | Size correction method for elbow passing pipe fitting |
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| JPS63295029A (en) * | 1987-05-25 | 1988-12-01 | Riken Corp | Production of tubular body |
| CN1455221A (en) * | 2003-06-03 | 2003-11-12 | 广州市华德工业有限公司 | Plate-type heat exchange tube gill and its manufacturing method and application |
| EP2110189A1 (en) * | 2008-04-18 | 2009-10-21 | ETH Zürich | Method for dieless forming of sheet metal |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807009A (en) * | 1971-04-06 | 1974-04-30 | J Ostbo | Method of manufacturing curved tube sections and the like |
| JPS6297723A (en) * | 1985-10-23 | 1987-05-07 | Moriya Minamiura | Can making method for sealed can |
| JPS63295029A (en) * | 1987-05-25 | 1988-12-01 | Riken Corp | Production of tubular body |
| CN1455221A (en) * | 2003-06-03 | 2003-11-12 | 广州市华德工业有限公司 | Plate-type heat exchange tube gill and its manufacturing method and application |
| EP2110189A1 (en) * | 2008-04-18 | 2009-10-21 | ETH Zürich | Method for dieless forming of sheet metal |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962308A (en) * | 2012-12-07 | 2013-03-13 | 哈尔滨工业大学 | Special internal high pressure shaping method for thin-wall welded shell |
| CN104668905A (en) * | 2014-12-31 | 2015-06-03 | 黄胜 | Manufacturing method for multidimensional curved conical tube |
| CN108143267A (en) * | 2016-12-06 | 2018-06-12 | 广东美的生活电器制造有限公司 | The manufacturing method of the liner of liner, heating vessel and heating vessel |
| CN109746635A (en) * | 2017-11-08 | 2019-05-14 | 上海宝冶集团有限公司 | Major diameter hyperbolic irregularly passes through production method of the mouth with bend pipe abnormity component |
| CN109746635B (en) * | 2017-11-08 | 2021-06-01 | 上海宝冶集团有限公司 | Method for manufacturing large-diameter hyperbolic irregular-penetration special-shaped component with bent pipe |
| CN113319150A (en) * | 2021-06-03 | 2021-08-31 | 哈尔滨工业大学 | Size correction method for elbow passing pipe fitting |
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Application publication date: 20110907 |