CN109175033A - A kind of abnormity hollow pipe bending and molding method and special-shaped hollow pipe bending and molding system - Google Patents
A kind of abnormity hollow pipe bending and molding method and special-shaped hollow pipe bending and molding system Download PDFInfo
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- CN109175033A CN109175033A CN201810960077.1A CN201810960077A CN109175033A CN 109175033 A CN109175033 A CN 109175033A CN 201810960077 A CN201810960077 A CN 201810960077A CN 109175033 A CN109175033 A CN 109175033A
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- hollow pipe
- bending
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- filled
- inner cavity
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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
- B21D9/00—Bending tubes using mandrels or the like
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- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a kind of special-shaped hollow pipe bending and molding method and special-shaped hollow pipe bending and molding systems, wherein, the abnormity hollow pipe bending and molding method is comprising steps of inflation: the inner cavity of hollow pipe is filled with gas before to bending, makes the tube wall of hollow pipe before bending persistently by pretension；Hollow pipe is closed at one end before the bending, open at one end；Bending: applying bending moment force to hollow tube wall, until special-shaped hollow pipe bending and molding.Abnormity hollow pipe bending and molding method provided by the present invention, makes tube wall persistently by pretension by being filled with gas, and when carrying out bending, the presence of pretension can reduce damage of the bending moment force to hollow pipe stress surface, reduces generated gravure；And gas is without cleaning, it is more environmentally friendly, while the mobility of gas is preferable, pretension can uniformly dispersing, further decrease gravure.
Description
Technical field
The present invention relates to pipeline field shaping technique more particularly to a kind of special-shaped hollow pipe bending and molding methods and different
Shape hollow pipe bending and molding system.
Background technique
During forming special-shaped hollow pipe by straight hollow pipe bending, bending moment force caused by bending is easy to cause sky
Core pipe stress surface is recessed, generates gravure, and the prior art to solve this technical problem, generallys use following methods:
1, it fills sand: thin steel sand is filled into hollow pipe, then using bending after mechanical system compression, in special-shaped hollow pipe bending and molding
Afterwards, sand is made to be detached from hollow pipe by the way of vibration.This simple process, but inefficiency.
2, oil-filled: high pressure liquid pressure oil to be linked into product, hollow pipe produces pretension, when overcoming moment of flexure using pretension
Indent phenomenon is generated, but the poor fluidity of liquid, product stress surface can still generate some gravures, influence appearance looks elegant.This technique
It is simple, high-efficient for filling sand, but clean hydraulic oil and be more troublesome, it is unsatisfactory for environmental requirement.
3, emulsifying liquid: being injected into hollow pipe for high-pressure emulsification liquid, and hollow body produces pretension, utilizes pretension
Indent phenomenon is generated when overcoming moment of flexure.This technique is simple, high-efficient for filling sand, for oil-filled, cleaning side
Just, but since the poor fluidity of liquid, product stress surface can still generate some gravures, beauty is influenced, and will form to a certain degree
Waste.
4, internal extraction core body: combined type articulations digitorum manus extraction core is inserted into tube body, the bending moment force generated when bending is supported.This
Method is simple, but is limited by space, and tubule is difficult to extraction core, and subsequent cleaning is also very bothersome.
As it can be seen that the existing technology needs to be improved and developed.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of special-shaped hollow pipe bending and molding methods
And special-shaped hollow pipe bending and molding system, this method make hollow pipe in bending, gravure produced by hollow pipe stress surface is smaller, and
It is more environmentally friendly without cleaning afterwards.
Technical scheme is as follows:
A kind of abnormity hollow pipe bending and molding method comprising step:
Inflation: the inner cavity of hollow pipe is filled with gas before to bending, makes the tube wall of hollow pipe before bending persistently by pretension；It is described
Hollow pipe is closed at one end before bending, open at one end；
Bending: applying bending moment force to hollow tube wall, until special-shaped hollow pipe bending and molding.
In further preferred embodiment, the inflation: the inner cavity of hollow pipe is filled with gas before to bending, makes sky before bending
The tube wall of core pipe is persistently further comprised the steps of: by pretension before
Sealing: hollow pipe any end before the bending of both ends open is sealed.
In further preferred embodiment, the sealing of hollow pipe is by pressing, being brazed, connecting sealing structure before the bending
Part or the mode for injecting sealant are completed.
In further preferred embodiment, the inflation: the inner cavity of hollow pipe is filled with gas before to bending, makes sky before bending
The tube wall of core pipe is persistently further comprised the steps of: by pretension before
Jointing: hollow pipe any end before the bending of both ends open is connected into inlet suction port, the inlet suction port is for connecting
Air charging system is connect, the air charging system is used to be filled with gas to the inner cavity of hollow pipe before bending.
In further preferred embodiment, the inflation: the inner cavity of hollow pipe is filled with gas before to bending, makes sky before bending
The tube wall of core pipe is persistently by pretension specifically:
Inflation: air charging system is filled with the gas of specified air pressure to the inner cavity of hollow pipe before bending, makes the tube wall of hollow pipe before bending
Persistently by the pretension in preset range.
In further preferred embodiment, when hollow pipe is the aluminium alloy hollow flat tube that wall thickness is less than or equal to 2mm, inflation
The air pressure of the be filled with gas in the inner cavity of device to hollow pipe before bending is in 0.5Mpa between 12Mpa.
In further preferred embodiment, when hollow pipe is the aluminium alloy hollow flat tube that wall thickness is less than 0.5mm, inflation dress
The air pressure 0.8Mpa to the be filled with gas in the inner cavity of hollow pipe before bending is set between 12Mpa.
In further preferred embodiment, when hollow pipe is wall thickness in 1mm to the aluminium alloy hollow flat tube between 1.5mm
When, air charging system is filled with the air pressure 1.5Mpa of gas between 12Mpa to the inner cavity of hollow pipe before bending.
In further preferred embodiment, when hollow pipe is wall thickness in 1.5mm to the aluminium alloy hollow flat tube between 2mm
When, air charging system is filled with the air pressure 1.5Mpa of gas between 12Mpa to the inner cavity of hollow pipe before bending.
A kind of abnormity hollow pipe bending and molding system comprising: air charging system and apparatus for bending, the air charging system are used for
The inner cavity of hollow pipe is filled with gas before to bending, makes the tube wall of hollow pipe before bending persistently by pretension, empty before the bending
Core pipe is closed at one end, open at one end；The apparatus for bending is used to apply bending moment force to hollow tube wall, until special-shaped hollow pipe folding
Roll forming.
Compared with prior art, special-shaped hollow pipe bending and molding method provided by the invention, due to using step: filling
Gas: the inner cavity of hollow pipe is filled with gas before to bending, makes the tube wall of hollow pipe before bending persistently by pretension；Before the bending
Hollow pipe is closed at one end, open at one end；Bending: applying bending moment force to hollow tube wall, until special-shaped hollow pipe bending and molding.This
Special-shaped hollow pipe bending and molding method, is rolling over tube wall persistently by pretension, by being filled with gas provided by invention
When curved, the presence of pretension can reduce damage of the bending moment force to hollow pipe stress surface, reduce generated gravure；And gas is not necessarily to
Cleaning, it is more environmentally friendly, while the mobility of gas is preferable, pretension can uniformly dispersing, further decrease gravure.
Detailed description of the invention
Fig. 1 is the flow chart of special-shaped hollow pipe bending and molding method preferred embodiment of the invention.
Fig. 2 is the structural representation of the special-shaped hollow pipe of middle special-shaped hollow pipe bending and molding method bending and molding through the invention
Figure.
Specific embodiment
The present invention provides a kind of special-shaped hollow pipe bending and molding method and special-shaped hollow pipe bending and molding system, to make this hair
Bright purpose, technical solution and effect are clearer, clear, referring to the drawings and give an actual example to the present invention further specifically
It is bright.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in Figures 1 and 2, the invention discloses a kind of 100 bending and molding methods of special-shaped hollow pipe, comprising steps of
S100, inflation: the inner cavity of hollow pipe is filled with gas before to bending, makes the tube wall of hollow pipe before bending persistently by pretension.
In ground preferred embodiment of the invention, make the tube wall of hollow pipe before bending persistently by the mode of pretension are as follows: logical
It overcharges device of air and is persistently filled with gas to the inner cavity of hollow pipe before bending.In this process, guarantee in addition to gas access, tube wall its
Remaining position seals are air tight preferably, but it is understood that, lesser preformed hole, because of insufficient small gap left of sealing etc.
Deng can't generating too much influence to pretension that tube wall is subject to, (lasting gas, which is filled with, can make up caused by gap exists
Gas leakage), the purpose for reducing gravure equally may be implemented.That is, hollow pipe is fully sealed and (simultaneously disregards gas access before bending
Including calculation) effect is preferable, but not serious gas leakage does not also influence realization of the invention.
The port of hollow pipe one end is preferable before the selection bending of gas access, because port is easy connection inlet suction port 200, is formed
Preferable sealed environment.But it is contemplated that in addition to port, remaining position as gas access also can, only compare and
Speech, the mode of port air inlet is the simplest, and easy to operate, efficiency is also higher.
If hollow pipe one end port is opening before bending, other end port should be sealed operation, and empty before bending
Core pipe is usually the hollow pipe of both ends open, therefore, before being inflated, further comprises the steps of: sealing: by the folding of both ends open
Curved preceding hollow pipe any end sealing.
For hollow pipe before the bending of other structures, for example, both ends sealing hollow pipe (be used as at its before bending and
Carried out both ends port sealing hollow pipe or other situations caused by both ends sealing hollow pipe) processing that is carried out is also
Not identical, processing mode may is that 110 mouthfuls of any one sealed end of excision, tube wall punching etc..It has for another example been that one end is opened
Mouthful, hollow pipe closed at one end (or tube wall be provided with suitable for inflation hole hollow pipe) can then be not processed, and directly into
Row charge operation.
Hollow pipe before the bending sealed for needs, there are many sealing means that can be utilized: such as riveting joint, pricker
(connection herein can be interference connection, threaded connection etc., and the structure of seal structural part also has for weldering and connection seal structural part
It is a variety of) etc., the modes such as sealant are injected for another example.
The present invention is preferably connecting air charging system, specially filling by way of air inlet port connects inlet suction port 200
Setting steps before gas: jointing: connecting inlet suction port 200 for hollow pipe any end before the bending of both ends open, described
Inlet suction port 200 is used to be filled with gas to the inner cavity of hollow pipe before bending for connecting air charging system, the air charging system.
In the selection of gas, the present invention claims specify gas according to the selections such as the wall thickness of hollow pipe, material, size before bending
Press the gas in range.Therefore, the aeration step specifically: inflation: air charging system is filled with to the inner cavity of hollow pipe before bending
The gas of specified air pressure makes the tube wall of hollow pipe before bending persistently by the pretension in preset range.According to hollow before bending
The difference of the performance of pipe, the bending moment force for carrying out bending is also different, therefore, pretension control can be optimized the party in a certain range
Method can achieve the effect that, reduces gravure as far as possible, even completely avoids the generation of gravure.
The present invention does exemplary illustration to the corresponding relationship of the air pressure of be filled with gas and hollow thickness of pipe wall and material, specifically
It is as follows:
When hollow pipe is the aluminium alloy hollow flat tube that wall thickness is less than or equal to 2mm, air charging system is to the inner cavity of hollow pipe before bending
The air pressure of be filled with gas is in 0.5Mpa between 12Mpa.
When hollow pipe is the aluminium alloy hollow flat tube that wall thickness is less than 0.5mm, air charging system is into hollow pipe before bending
The air pressure 0.8Mpa of the be filled with gas of chamber is between 12Mpa.
When hollow pipe is wall thickness when 1mm is to aluminium alloy hollow flat tube between 1.5mm, air charging system is to hollow before bending
The inner cavity of pipe is filled with the air pressure 1.5Mpa of gas between 12Mpa.
When hollow pipe is wall thickness when 1.5mm is to aluminium alloy hollow flat tube between 2mm, air charging system is to hollow before bending
The inner cavity of pipe is filled with the air pressure 1.5Mpa of gas between 12Mpa.
S200, bending: applying bending moment force to hollow tube wall, until 100 bending and molding of special-shaped hollow pipe.Apparatus for bending
Select use, the control of bending moment force and specific wrap direction has been the prior art, and the present invention is no longer excessively repeated herein.
After step bending, the post-processing such as whether sealed end 110 cut off, depressurization can be according to abnormity
The effect of hollow pipe 100 selects, for example special-shaped hollow pipe 100 is subsequent in use, needing its structure for one end sealing, one end is opened
Mouthful, then without carrying out other processing.If desired the special-shaped hollow pipe 100 of both ends open, then can be according to the sealing side of sealed end 110
Formula is cut off the processing such as (such as soldering), depressurization (such as connection seal structural part).
It is preferred that the present invention sets the close of sealed end 110 according to special-shaped hollow pipe 100 after molding before bending
Envelope mode, to simplify treatment process after molding.
The present invention also provides a kind of special-shaped hollow pipe bending and molding systems comprising: air charging system and apparatus for bending, institute
Air charging system is stated for the inner cavity of hollow pipe before bending being filled with gas, opens the tube wall of hollow pipe before bending persistently in advance
Power, hollow pipe is closed at one end before the bending, open at one end；The apparatus for bending is used to apply bending moment force to hollow tube wall,
Until special-shaped hollow pipe bending and molding, specifically as described in above method embodiment.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of abnormity hollow pipe bending and molding method, which is characterized in that comprising steps of
Inflation: the inner cavity of hollow pipe is filled with gas before to bending, makes the tube wall of hollow pipe before bending persistently by pretension；It is described
Hollow pipe is closed at one end before bending, open at one end；
Bending: applying bending moment force to hollow tube wall, until special-shaped hollow pipe bending and molding.
2. abnormity hollow pipe bending and molding method according to claim 1, which is characterized in that the inflation: to before bending
The inner cavity of hollow pipe is filled with gas, makes the tube wall of hollow pipe before bending persistently by further comprising the steps of: before pretension
Sealing: hollow pipe any end before the bending of both ends open is sealed.
3. abnormity hollow pipe bending and molding method according to claim 2, which is characterized in that hollow pipe before the bending
Sealing is completed by way of pressing, being brazed, connect seal structural part or injection sealant.
4. abnormity hollow pipe bending and molding method according to claim 1, which is characterized in that the inflation: to before bending
The inner cavity of hollow pipe is filled with gas, makes the tube wall of hollow pipe before bending persistently by further comprising the steps of: before pretension
Jointing: hollow pipe any end before the bending of both ends open is connected into inlet suction port, the inlet suction port is for connecting
Air charging system is connect, the air charging system is used to be filled with gas to the inner cavity of hollow pipe before bending.
5. abnormity hollow pipe bending and molding method according to claim 1, which is characterized in that the inflation: to before bending
The inner cavity of hollow pipe is filled with gas, makes the tube wall of hollow pipe before bending persistently by pretension specifically:
Inflation: air charging system is filled with the gas of specified air pressure to the inner cavity of hollow pipe before bending, makes the tube wall of hollow pipe before bending
Persistently by the pretension in preset range.
6. abnormity hollow pipe bending and molding method according to claim 5, which is characterized in that when hollow pipe is less than for wall thickness
When aluminium alloy hollow flat tube equal to 2mm, the air pressure of the be filled with gas in the inner cavity of air charging system to hollow pipe before bending exists
0.5Mpa is between 12Mpa.
7. abnormity hollow pipe bending and molding method according to claim 5, which is characterized in that when hollow pipe is less than for wall thickness
When the aluminium alloy hollow flat tube of 0.5mm, the air pressure 0.8Mpa of the be filled with gas in the inner cavity of air charging system to hollow pipe before bending is extremely
Between 12Mpa.
8. abnormity hollow pipe bending and molding method according to claim 5, which is characterized in that when hollow pipe is that wall thickness exists
When 1mm is to aluminium alloy hollow flat tube between 1.5mm, air charging system is filled with the air pressure of gas to the inner cavity of hollow pipe before bending
1.5Mpa is between 12Mpa.
9. abnormity hollow pipe bending and molding method according to claim 5, which is characterized in that when hollow pipe is that wall thickness exists
When 1.5mm is to aluminium alloy hollow flat tube between 2mm, air charging system is filled with the air pressure of gas to the inner cavity of hollow pipe before bending
1.5Mpa is between 12Mpa.
10. a kind of abnormity hollow pipe bending and molding system characterized by comprising air charging system and apparatus for bending, the inflation
Device is used to the inner cavity of hollow pipe before bending be filled with gas, makes the tube wall of hollow pipe before bending persistently by pretension, described
Hollow pipe is closed at one end before bending, open at one end；The apparatus for bending is used to apply bending moment force to hollow tube wall, until abnormity
Hollow pipe bending and molding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960077.1A CN109175033B (en) | 2018-08-22 | 2018-08-22 | Special-shaped hollow pipe bending forming method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960077.1A CN109175033B (en) | 2018-08-22 | 2018-08-22 | Special-shaped hollow pipe bending forming method |
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| CN109175033A true CN109175033A (en) | 2019-01-11 |
| CN109175033B CN109175033B (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633079A (en) * | 2020-06-02 | 2020-09-08 | 碳元科技股份有限公司 | Method for treating heat conduction pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214516A (en) * | 2007-12-27 | 2008-07-09 | 李春江 | Technique for producing refrigeration evaporator winding pipe of refrigerator refrigerating device |
| CN101486055A (en) * | 2007-12-27 | 2009-07-22 | 李春江 | Method for producing winding pipe of refrigerating device refrigeration evaporator of refrigerator and winding pipe device |
| CN205599725U (en) * | 2016-05-04 | 2016-09-28 | 重庆港乾机械有限公司 | Gasbag formula bearing structure for double tube buckles |
-
2018
- 2018-08-22 CN CN201810960077.1A patent/CN109175033B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214516A (en) * | 2007-12-27 | 2008-07-09 | 李春江 | Technique for producing refrigeration evaporator winding pipe of refrigerator refrigerating device |
| CN101486055A (en) * | 2007-12-27 | 2009-07-22 | 李春江 | Method for producing winding pipe of refrigerating device refrigeration evaporator of refrigerator and winding pipe device |
| CN205599725U (en) * | 2016-05-04 | 2016-09-28 | 重庆港乾机械有限公司 | Gasbag formula bearing structure for double tube buckles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633079A (en) * | 2020-06-02 | 2020-09-08 | 碳元科技股份有限公司 | Method for treating heat conduction pipe |
| CN111633079B (en) * | 2020-06-02 | 2022-11-29 | 碳元科技股份有限公司 | Method for treating heat conduction pipe |
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| Publication number | Publication date |
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| CN109175033B (en) | 2020-05-19 |
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