CN110153266A - A kind of internal high pressure forming technique of new aluminium alloy shaped-tube - Google Patents
A kind of internal high pressure forming technique of new aluminium alloy shaped-tube Download PDFInfo
- Publication number
- CN110153266A CN110153266A CN201910564987.2A CN201910564987A CN110153266A CN 110153266 A CN110153266 A CN 110153266A CN 201910564987 A CN201910564987 A CN 201910564987A CN 110153266 A CN110153266 A CN 110153266A
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- China
- Prior art keywords
- pipe
- tube
- pressure
- aluminium alloy
- high pressure
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Classifications
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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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A kind of internal high pressure forming technique of new aluminium alloy shaped-tube, processing step are as follows: 1, mechanical analysis are carried out to shape tube raw material, chemical component detects, and is then heat-treated to the pipe after preforming, it is air-cooled；Pipe outer wall is drawn smooth, tube wall one layer of thin polyethylene film of winding with wire drawing cloth by nozzle chamfering；2, processed pipe is put into the suitable position of type chamber, left and right formed punch hand feed, until formed punch is completely into end sealing, molding；3, manual fliud flushing pressure is set, exhaust-valve is opened, pours pressure medium, closes emptying flow spill valve, by the pressure value and bit shift compensation value automatic running program of setting；4, it is finished to the operation of above-mentioned steps program, manual pressure release, left and right pressure cylinder retracts origin-location, observes the whether complete pad pasting of pipe, and whether there is or not dead wrinkle phenomenons to occur.The present invention first anneals to material, eliminates residual stress, reduces deformation and crackle tendency, improves material property, more conducively internal high pressure forming.
Description
Technical field
The present invention is a kind of aluminium-alloy pipe forming technique field, more particularly to a kind of interior height of new aluminium alloy shaped-tube
Pressing formation technique.
Background technique
Thin-wall aluminum alloy opposite sex pipe because intensity is relatively high, light weight, Aeronautics and Astronautics, automobile, machine-building, ship and
It has been widely applied in chemical industry, the shape tube is mainly that plate stamping is welded in aeronautical manufacture at present, forming process
More, intensity is low, and quality is big, and production efficiency is low, and service life is short.And internal high-pressure forming special-shaped pipe is monolithic molding, pipe strength
Height, light weight, long service life is safer, and precision is high, which has been successfully applied to aviation pipeline road.Aluminium alloy at present
The internal high pressure forming technique basic step of shape tube is as follows: first to the chemical component of raw material, mechanical property is detected, and is obtained
Obtain materials microstructure performance；Then a large amount of sunykatuib analysis is carried out to shape tube digital-to-analogue, obtains overpressure and pipe end displacement is mended
The relationship repaid；Finally a large amount of simulation value is inputted in internal high pressure forming equipment, carries out a large amount of experiments repeatedly.Due to interior height
When pressing formation, pipe is in a closed mold cavity, and the flowing of material is with both ends bit shift compensation, pressure buildup, type chamber profit
Cunning has relationship.Pressure is excessive, and pipe easily ruptures, and bit shift compensation is excessive, and extremely wrinkling easily occurs in pipe.
Relative to titanium alloy materials in the tube, aluminium alloy pipe plasticity is poor, and intensity is low, often breaks in interior high pressure Bulging Process
Phenomena such as splitting, wrinkling, how command displacement heel pressure, which kind of lubricant added, be those skilled in the art research new issue.
Since existing shape tube internal high pressure forming is little to practical directive significance of producing in enormous quantities, and time and effort consuming, at
This height, therefore there is an urgent need to a kind of internal high pressure forming techniques of new aluminium alloy shaped-tube.
Summary of the invention
The purpose of the present invention is high-pressure molding in existing aluminium alloy shaped-tube there are aiming at the problem that, propose a kind of new aluminium
The internal high pressure forming technique of alloy shape tube reduces process to solve the problems such as technique is immature in existing production, save at
This, improves efficiency.
A kind of internal high pressure forming technique of new aluminium alloy shaped-tube.Specific step is as follows for the forming technology；
Step 1: mechanical analysis, chemical component detection being carried out to aluminium alloy shaped-tube raw material first, with endoscopy pipe
Inside and outside surface quality, without obvious scratch, no pit etc. influences the defect of Tube Forming, intercepts pipe, pipe by shape tube digital-to-analogue
Both ends made allowance 95-105 ㎜, then both ends deburring are bent；The pipe being bent is put into preforming tool to carry out in advance
Molding, at the position for being easy to bite, is slightly beaten with rubber hammer, keeps the preforming quality of tube blank steel come out intact；With dedicated oil removing
Dirty cleaning agent cleans pipe surfaces externally and internally, is then heat-treated to the pipe after preforming, and heat treatment temperature is 280~
300 DEG C, 29-31 minutes are kept the temperature, it is air-cooled；Pipe outer wall is drawn smooth, impulse- free robustness with wire drawing cloth by nozzle both ends flap disc chamfering,
One layer of thin polyethylene film is wound to tube wall, upper/lower die type chamber applies lubricating oil；
Step 2: processed pipe being put into the suitable position of type chamber, left and right formed punch hand feed, while guaranteeing pipe not
It is dynamic, it until formed punch is completely into end sealing, molds, compresses, prevent in Bulging Process that leakage and die joint are excessive, influence size
Precision causes rejected product；
Step 3: setting manual fliud flushing pressure, pressure limit is 5~10MPa, opens exhaust-valve, pours pressure medium water second manually
Glycol, until liquid is without obvious bubble, closing emptying flow spill valve, by the pressure value and bit shift compensation value automatic running journey of setting
Sequence in the linear relationship of display observation bit shift compensation and pressure, while paying attention to bulging situation；
Step 4: being finished to the operation of above-mentioned steps program, manual pressure release, left and right pressure cylinder retracts origin-location, and whether observation pipe
Complete pad pasting, whether there is or not dead wrinkle phenomenons to occur.
The present invention has following remarkable result:
1, the present invention is operated simple using with automatic dual control system, can preferably observe being put into and taking out for materials in the tube manually
It is single, it is easily controllable.
2, the present invention uses variable-ratio hydraulic control system, keeps bit shift compensation more accurate.
3, the present invention uses overflow pressure regulating valve, and the pressure in pipe can be made linearly to increase, prevent overpressure from neglecting
It is high suddenly low, cause pipe spalling or dead wrinkle phenomenon to occur.
4, present invention process winds polyethylene film to pipe appearance, it is possible to reduce friction of the material in bit shift compensation
Power, while can protect outer surface quality, reduce die joint.
5, it first anneals to material before present invention process bulging, the residual stress generated when eliminating die mould stablizes ruler
It is very little, reduce deformation and crackle tendency, refine crystal grain, homogeneous material tissue and ingredient improve material property, more conducively in high pressure at
Shape.
Specific embodiment
For the specific embodiment of the invention with aviation 5A02 aluminium-alloy pipe, pipe specification is high in 52 × 1.5 ㎜ of φ is carried out
It is molded.
A kind of internal high pressure forming technique of new aluminium alloy shaped-tube.Specific step is as follows for the forming technology；
Step 1: mechanical analysis, chemical component detection being carried out to aluminium alloy shaped-tube raw material first, with endoscopy pipe
Inside and outside surface quality, without obvious scratch, no pit etc. influences the defect of Tube Forming, intercepts pipe, pipe by shape tube digital-to-analogue
100 ㎜ of both ends made allowance, then both ends deburring are bent；By the pipe being bent be put into preforming tool carry out in advance at
Type is slightly beaten at the position for being easy to bite with rubber hammer, keeps the preforming quality of tube blank steel come out intact；It is degreased with dedicated
Cleaning agent cleans pipe surfaces externally and internally, is then heat-treated to the pipe after preforming, heat treatment temperature 280-300
DEG C, 30 minutes are kept the temperature, it is air-cooled；Pipe outer wall is drawn smooth, impulse- free robustness with wire drawing cloth by nozzle both ends flap disc chamfering, gives tube wall
One layer of thin polyethylene film is wound, upper/lower die type chamber applies lubricating oil；
Step 2: processed pipe being put into the suitable position of type chamber, left and right formed punch hand feed, while guaranteeing pipe not
Dynamic, until formed punch is completely into end sealing, molding compresses, prevents leakage in Bulging Process, die joint is excessive, influences size
Precision causes rejected product；
Step 3: setting manual fliud flushing pressure, pressure limit 5-10MPa opens exhaust-valve, pours pressure medium water second manually
Glycol, until liquid is without obvious bubble, closing emptying flow spill valve, by the pressure value and bit shift compensation value automatic running journey of setting
Sequence in the linear relationship of display observation bit shift compensation and pressure, while paying attention to bulging situation；
Step 4: being finished to the operation of above-mentioned steps program, manual pressure release, left and right pressure cylinder retracts origin-location, and whether observation pipe
Complete pad pasting, whether there is or not dead wrinkle phenomenons to occur.
In step 2 and step 3, processed pipe is put into the suitable position of the type chamber of lower mold, opens hydraulic send
Into system switching button, the right hand is sent into left formed punch with removable remote controler crawl, and left hand presses pipe, when pipe starts to move
When, stop the feeding of left formed punch, be sent into right formed punch with removable remote controler crawl, until left and right formed punch is completely close with pipe end alignment
Envelope, closes upper mold, compresses；Extra high voltage system switch button is opened, is started to pipe fliud flushing, setting pressure is 5-10MPa, together
When unscrew emptying overflow valve, emptied, when empty overflow valve nozzle without obvious drum when, stop fliud flushing, tighten exhaust-valve,
Control system inputs given parameter (such as table 1) and runs program, while observing bulging situation, and the necessary someone guard in scene pays attention to peace
Entirely.
Table 1
| Number of segment | Left dislocation (㎜) | Right displacement (㎜) | It sets pressure (MPa) | Time (s) |
| 1 | 2 | 2 | 5 | 30 |
| 2 | 4 | 4 | 10 | 30 |
| 3 | 6 | 6 | 20 | 30 |
| 4 | 8 | 8 | 30 | 30 |
| 5 | 8 | 10 | 35 | 60 |
Present invention process is the data and experience obtained on a large amount of experiment basis, although above embodiments are directed to a kind of material
Material, a kind of scale lengths are the specific implementation methods in order to which this technique is better described.Those skilled in the art or operation
High-pressure molding in personnel's aluminium alloy shaped-tube that processing step carries out according to the present invention, all belongs to the scope of protection of the present invention.
Claims (4)
1. a kind of internal high pressure forming technique of new aluminium alloy shaped-tube, which is characterized in that specific step is as follows for the forming technology:
Step 1: mechanical analysis, chemical component detection being carried out to aluminium alloy shaped-tube raw material first, with endoscopy pipe
Inside and outside surface quality, without obvious scratch, no pit etc. influences the defect of Tube Forming, intercepts pipe, pipe by shape tube digital-to-analogue
Both ends made allowance, then both ends deburring are bent；By the pipe being bent be put into preforming tool carry out it is preforming, holding
The position easily bitten slightly is beaten with rubber hammer, keeps the preforming quality of tube blank steel come out intact；It is clear with the dedicated cleaning agent that degreases
Pipe surfaces externally and internally is washed, then the pipe after preforming is heat-treated, it is air-cooled；Nozzle both ends flap disc chamfering is used
Pipe outer wall is drawn smooth, impulse- free robustness by wire drawing cloth, winds one layer of thin polyethylene film to tube wall, upper/lower die type chamber applies lubricating oil；
Step 2: processed pipe being put into the suitable position of type chamber, left and right formed punch hand feed, while guaranteeing pipe not
It is dynamic, it until formed punch is completely into end sealing, molds, compresses, prevent in Bulging Process that leakage and die joint are excessive, influence size
Precision causes rejected product；
Step 3: setting manual fliud flushing pressure, open exhaust-valve, pressure medium water glycol is poured manually, until liquid is without obvious
Bubble closes emptying flow spill valve, by the pressure value and bit shift compensation value automatic running program of setting, observes and is displaced in display
The linear relationship of compensation and pressure, while paying attention to bulging situation；
Step 4: being finished to the operation of above-mentioned steps program, manual pressure release, left and right pressure cylinder retracts origin-location, and whether observation pipe
Complete pad pasting, whether there is or not dead wrinkle phenomenons to occur.
2. the internal high pressure forming technique of aluminium alloy shaped-tube according to claim 1, which is characterized in that pipe in step 1
The surplus that both ends are stayed is 95-105 ㎜.
3. the internal high pressure forming technique of aluminium alloy shaped-tube according to claim 1, which is characterized in that in step 1 at heat
Managing temperature is 280~300 DEG C, keeps the temperature 29-31 minutes.
4. the internal high pressure forming technique of aluminium alloy shaped-tube according to claim 1, which is characterized in that in step 3, manually
Fliud flushing pressure limit is 5~10MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910564987.2A CN110153266A (en) | 2019-06-27 | 2019-06-27 | A kind of internal high pressure forming technique of new aluminium alloy shaped-tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910564987.2A CN110153266A (en) | 2019-06-27 | 2019-06-27 | A kind of internal high pressure forming technique of new aluminium alloy shaped-tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110153266A true CN110153266A (en) | 2019-08-23 |
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| CN201910564987.2A Pending CN110153266A (en) | 2019-06-27 | 2019-06-27 | A kind of internal high pressure forming technique of new aluminium alloy shaped-tube |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160104119A (en) * | 2015-02-25 | 2016-09-05 | 현대자동차주식회사 | Apparatus for hot blow forming and hot blow forming method for flange-shaped tube using the same |
| CN106270102A (en) * | 2016-10-27 | 2017-01-04 | 南昌航空大学 | A kind of method mating internal high pressure forming threeway overpressure and feeding relation |
| CN207271891U (en) * | 2017-08-14 | 2018-04-27 | 上海吉诺士汽车配件有限公司 | A kind of aluminium alloy car subframe building mortion based on internal high pressure forming |
| CN108787845A (en) * | 2018-05-28 | 2018-11-13 | 南京理工大学 | A kind of hydroforming equipment of large diameter thin wall metal tube |
| CN109226434A (en) * | 2018-08-27 | 2019-01-18 | 广东思豪内高压科技有限公司 | A kind of water swelling moulding process of titanium alloy cup |
| CN109500195A (en) * | 2018-11-19 | 2019-03-22 | 大连理工大学 | A kind of special tubes and pipes of aluminium alloy part ultralow temperature pressure medium manufacturing process |
-
2019
- 2019-06-27 CN CN201910564987.2A patent/CN110153266A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160104119A (en) * | 2015-02-25 | 2016-09-05 | 현대자동차주식회사 | Apparatus for hot blow forming and hot blow forming method for flange-shaped tube using the same |
| CN106270102A (en) * | 2016-10-27 | 2017-01-04 | 南昌航空大学 | A kind of method mating internal high pressure forming threeway overpressure and feeding relation |
| CN207271891U (en) * | 2017-08-14 | 2018-04-27 | 上海吉诺士汽车配件有限公司 | A kind of aluminium alloy car subframe building mortion based on internal high pressure forming |
| CN108787845A (en) * | 2018-05-28 | 2018-11-13 | 南京理工大学 | A kind of hydroforming equipment of large diameter thin wall metal tube |
| CN109226434A (en) * | 2018-08-27 | 2019-01-18 | 广东思豪内高压科技有限公司 | A kind of water swelling moulding process of titanium alloy cup |
| CN109500195A (en) * | 2018-11-19 | 2019-03-22 | 大连理工大学 | A kind of special tubes and pipes of aluminium alloy part ultralow temperature pressure medium manufacturing process |
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| PB01 | Publication | ||
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Application publication date: 20190823 |