CN104226778B - Miniature tube bidirectional hydraulic make-up mould - Google Patents
Miniature tube bidirectional hydraulic make-up mould Download PDFInfo
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- CN104226778B CN104226778B CN201410475121.1A CN201410475121A CN104226778B CN 104226778 B CN104226778 B CN 104226778B CN 201410475121 A CN201410475121 A CN 201410475121A CN 104226778 B CN104226778 B CN 104226778B
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- guide block
- hole
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Abstract
The invention discloses a kind of miniature tube bidirectional hydraulic make-up mould, including guide block, cylindrical shell, insert, blank holder and sealing block；The surfaces externally and internally of miniature tube can be applied pressure by the present invention simultaneously, drives miniature tube molding by pressure differential；The introducing of back pressure can stop the generation of the internal generation of microcrack of miniature tube, growth, forming core, and then is greatly improved miniature tube plastic forming ability；And the present invention one O RunddichtringO of each installation on two end faces of sealing block, sealing property is greatly improved, and can the highly pressurised liquid of pressure up to 350MPa be sealed；Simultaneously also highly pressurised liquid inside and outside miniature tube is isolated, it is to avoid the connection of inside and outside highly pressurised liquid；It addition, install an O RunddichtringO between insert and blank holder additional, it is to avoid external high pressure liquid is connected with intrinsic pressure by insert.
Description
Technical field
The invention belongs to miniature tube field shaping technique, particularly a kind of miniature tube bidirectional hydraulic make-up mould.
Background technology
Pipe fitting hydraulic molding technique is as former material with pipe, by applying fluid pressure in tube chamber and making it that plastic deformation, tube wall and mould inner surface laminating to occur in given mold cavity at axial imposed load, thus obtaining the forming technique of required form part.At present, pipe fitting shaped by fluid pressure is mainly used in automobile frame and the manufacture of chassis part, large ship, aerospace industry.But; development along with science and technology; the demand of micro hollow pipe fitting is strengthened by the industries such as electronics, medical treatment, micro-apparatus day by day; in the urgent need to a process technology that can manufacture miniature pipe fitting in high volume, a kind of micro hollow pipe fitting large-scale production technology that miniature pipe fitting shaped by fluid pressure grows up just under this requirement background.This technology adopts highly pressurised liquid to make the mode of metal capillary plastic deformation mold the miniature pipe fitting that cross sectional shape is complicated, the molding of the miniature parts such as such as implanted micro delivery tube, miniature needle tubing, micromotor axle can be realized by this technology, and the miniature pipe fitting that this technology shapes out has good prospects in sector applications such as electronics, medical treatment, micro-apparatuses.But, pipe fitting microminiaturization makes the various aspects of forming technology system, and as miniature tube material processability, moulding process, friction etc. all exist the problem of scale effect, therefore in the process of traditional shaped by fluid pressure, miniature pipe fitting is especially easy to break.
WagnerSW, NgK, EmblomWJ et al. proposes electricity auxiliary in Influenceofcontinuousdirectcurrentonthemicrotubehydrofor mingprocess and manufactures the concept of EAM, and their method is in the process of miniature pipe fitting shaped by fluid pressure, and miniature tube is energized.Under the precondition of the intensity and toughness that ensure miniature tube, reduce the deformation energy required for miniature tube by electric energy, and then improve the forming ability of miniature tube.But this device is complicated, operate inconvenience, and introduces electric current in the process of processing, has certain potential safety hazard.It addition, for millimetre-sized miniature tube, owing to size is small, clamping gets up also inconvenient.HartlC, AnyasodorG et al. point out at FormabilityofMicro-TubesinHydroforming, respectively fill in the stopper of a sharp mouth hollow at the two ends of miniature tube so that it is swell, and then pass through the extruding between stopper and mould to make it fix.But this technical process has problems that, it destroys the original shape of miniature tube, and the sealing of highly pressurised liquid is unreliable.YoshihiroAmikura et al. points out at fractureevaluationofA1070AluminumMicro-tubesUsingBulgeFo rming, and miniature tube is sealed by the mode extruding O RunddichtringO with one block of plate.This sealing means has good sealing effectiveness, but to seal the Special high-voltage of 350MPa or insecure.
In order to solve problems above, we introduce a new molding parameter-back pressure, say, that the surfaces externally and internally at miniature tube is simultaneously introduced the highly pressurised liquid that pressure is different, is driven the molding of miniature pipe fitting by pressure differential.This method can well improve the plastic forming ability of miniature tube, but up to the present, realizes this process but without suitable device.
Summary of the invention
It is an object of the invention to provide a kind of plastic forming ability that can effectively improve miniature tube, reduce the miniature tube bidirectional hydraulic make-up mould of the defect rate of miniature tube molding.
The technical solution realizing the object of the invention is:
A kind of miniature tube bidirectional hydraulic make-up mould, including guide block, cylindrical shell, insert, blank holder and sealing block；The end face of guide block is provided with two holes, one of them hole is in the intrinsic pressure liquid port of miniature tube of guide block center, another hole is in the miniature tube external pressure liquid port of guide block eccentric part, guide block other end has the annular groove that axle center is the center of circle of a guide block, guide block is respectively fixedly disposed at the two ends of cylindrical shell by annular groove, the inner side at the position that cylindrical shell contacts with guide block is provided with O RunddichtringO, guide block arranges counter sink in the end face center arranging annular groove, counter sink and the intrinsic pressure liquid port of miniature tube is run through by the diameter micro-hole less than or equal to 5mm at the axle center place of guide block；nullThe counter sink secure fit of one end of insert and guide block，And positioned by locating dowel，One end that insert is arranged in guide block counter sink has counter sink，The center of this counter sink is provided with a central through hole running through insert，The two ends of this central through hole are provided with O RunddichtringO，Sealing block is fixedly installed in this counter sink，Sealing block center is provided with central through hole，The annular groove that it is the center of circle with the axle center of sealing block that the both ends of the surface of sealing block are provided with，The distance in the distance in the external diameter of the annular groove of the side contacted with guide block and the sealing block center of circle external diameter more than the side annular groove contacted with insert and the sealing block center of circle，And the annular groove width of the side contacted with guide block and the degree of depth both are greater than the width of side annular groove and the degree of depth that contact with insert，The annular groove at sealing block two ends is provided with O RunddichtringO，Blank holder center is provided with a central through hole，Blank holder is fixed away from one end of guide block with insert，The intrinsic pressure liquid port of miniature tube on the guide block at cylindrical shell two ends、Micro-hole on guide block、Central through hole in insert、Central through hole on sealing block and the central through hole on blank holder are all coaxial，The cavity conducting that external pressure liquid port on guide block is surrounded by the diameter micro-hole less than or equal to 5mm and guide block and cylindrical shell.
The present invention compared with prior art, its remarkable advantage:
(1) present invention is different from traditional one side hydroforming process, it is possible to the surfaces externally and internally of miniature tube is applied pressure simultaneously, drives miniature tube molding by pressure differential.The introducing of back pressure can stop the generation of the internal generation of microcrack of miniature tube, growth, forming core, and then is greatly improved miniature tube plastic forming ability；And this process has only to ensure to be easily achieved being precisely controlled external and internal pressure by PLC.
(2) present invention is each on two end faces of sealing block installs an O RunddichtringO, and sealing property is greatly improved, and can the highly pressurised liquid of pressure up to 350MPa be sealed；Simultaneously also highly pressurised liquid inside and outside miniature tube is isolated, it is to avoid the connection of inside and outside highly pressurised liquid.It addition, install an O RunddichtringO between insert and blank holder additional, it is to avoid external high pressure liquid is connected with intrinsic pressure by insert.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of miniature tube bidirectional hydraulic make-up mould of the present invention.
Fig. 2 is the structural representation of the miniature tube bidirectional hydraulic make-up device that have employed miniature tube bidirectional hydraulic make-up mould of the present invention.
Detailed description of the invention
One miniature tube bidirectional hydraulic make-up mould of the present invention, including guide block 7, cylindrical shell 6, insert 5, blank holder 4, sealing block 3 and packing ring 2；The end face of guide block 7 is provided with two holes, one of them hole is in the intrinsic pressure liquid port of miniature tube of guide block 7 center, another hole is in the miniature tube external pressure liquid port of guide block 7 eccentric part, guide block 7 other end has the annular groove that axle center is the center of circle of a guide block 7, guide block 7 is respectively fixedly disposed at the two ends of cylindrical shell 6 by annular groove, the inner side at the position that cylindrical shell 6 contacts with guide block 7 is provided with O RunddichtringO, guide block 7 arranges counter sink in the end face center arranging annular groove, counter sink and the intrinsic pressure liquid port of miniature tube is run through by the diameter micro-hole less than or equal to 5mm at the axle center place of guide block 7；nullThe counter sink secure fit of one end of insert 5 and guide block 7，And positioned by locating dowel，One end that insert 5 is arranged in guide block 7 counter sink has counter sink，The center of this counter sink is provided with a central through hole running through insert 5，The two ends of this central through hole are provided with O RunddichtringO，Sealing block 3 is fixedly installed in this counter sink，Sealing block 3 center is provided with central through hole，The annular groove that it is the center of circle with the axle center of sealing block 3 that the both ends of the surface of sealing block 3 are provided with，The distance in the distance in the external diameter of the annular groove of the side contacted with guide block 7 and sealing block 3 center of circle external diameter more than the side annular groove contacted with insert 5 and sealing block 3 center of circle，And the annular groove width of the side contacted with guide block 7 and the degree of depth both are greater than the width of side annular groove and the degree of depth that contact with insert，The annular groove at sealing block 3 two ends is provided with O RunddichtringO，Blank holder 4 center is provided with a central through hole，Blank holder 4 is fixed away from one end of guide block 7 with insert 5，The intrinsic pressure liquid port of miniature tube on the guide block 7 at cylindrical shell 6 two ends、Micro-hole on guide block 7、Central through hole in insert 5、Central through hole on sealing block 3 and the central through hole on blank holder 4 are all coaxial，The cavity conducting that external pressure liquid port on guide block 7 is surrounded by the diameter micro-hole less than or equal to 5mm and guide block 7 and cylindrical shell 6.
One end that the counter sink of insert 5 and guide block 7 is opposing is flange plate-like, and its flange portion and guide block 7 are provided with packing ring 2.
The flange portion of insert 5 is uniformly distributed three unthreaded holes and hole, symmetrical two location, and insert 5 is by being bolted on guide block 7 through unthreaded hole and packing ring 2, and by the locating dowel location through hole, location and packing ring 2.
The circumference of blank holder 4 is uniformly distributed three unthreaded holes, and blank holder 4 is by being bolted in insert 5 through unthreaded hole.
The material of O RunddichtringO is hardness is the fluorosioloxane rubber of 90A.
Embodiment:
A kind of shaped device that have employed miniature tube bidirectional hydraulic make-up mould of the present invention, module, internal pressure pump A, external pressure compression pump A ＇, interior pressure booster B, outer pressure booster B ＇, intrinsic pressure check valve C, external pressure check valve C ＇, intrinsic pressure high pressure needle valve E, external pressure high pressure needle valve E ＇, fuel tank F mould D is controlled including PLC；Wherein, mould includes guide block 7, cylindrical shell 6, insert 5, blank holder 4, sealing block 3 and packing ring 2；The end face of guide block 7 is provided with two holes, one of them hole is in the intrinsic pressure liquid port of miniature tube of guide block 7 center, another hole is in the miniature tube external pressure liquid port of guide block 7 eccentric part, guide block 7 other end has the annular groove that axle center is the center of circle of a guide block 7, guide block 7 is respectively fixedly disposed at the two ends of cylindrical shell 6 by annular groove, the inner side at the position that cylindrical shell 6 contacts with guide block 7 is provided with O RunddichtringO, guide block 7 arranges counter sink in the end face center arranging annular groove, counter sink and the intrinsic pressure liquid port of miniature tube is run through by the diameter micro-hole less than or equal to 5mm at the axle center place of guide block 7；nullThe counter sink secure fit of one end of insert 5 and guide block 7，And positioned by locating dowel，One end that insert 5 is arranged in guide block 7 counter sink has counter sink，The center of this counter sink is provided with a central through hole running through insert 5，The two ends of this central through hole are provided with O RunddichtringO，Sealing block 3 is fixedly installed in this counter sink，Sealing block 3 center is provided with central through hole，The annular groove that it is the center of circle with the axle center of sealing block 3 that the both ends of the surface of sealing block 3 are provided with，The distance in the distance in the external diameter of the annular groove of the side contacted with guide block 7 and sealing block 3 center of circle external diameter more than the side annular groove contacted with insert 5 and sealing block 3 center of circle，And the annular groove width of the side contacted with guide block 7 and the degree of depth both are greater than the width of side annular groove and the degree of depth that contact with insert，The annular groove at sealing block 3 two ends is provided with O RunddichtringO，Blank holder 4 center is provided with a central through hole，Blank holder 4 is fixed away from one end of guide block 7 with insert 5，The intrinsic pressure liquid port of miniature tube on the guide block 7 at cylindrical shell 6 two ends、Micro-hole on guide block 7、Central through hole in insert 5、Central through hole on sealing block 3 and the central through hole on blank holder 4 are all coaxial，The cavity conducting that external pressure liquid port on guide block 7 is surrounded by the diameter micro-hole less than or equal to 5mm and guide block 7 and cylindrical shell 6；PLC controls module and controls internal pressure pump A and external pressure compression pump A ＇ respectively, one intrinsic pressure liquid port of miniature tube of mould is connected with intrinsic pressure check valve C in turn, interior pressure booster B and internal pressure pump A, it is provided with intrinsic pressure high pressure needle valve E between the intrinsic pressure liquid port of another miniature tube and the fuel tank F of mould, one miniature tube external pressure liquid port of mould is connected with external pressure check valve C ＇ in turn, outer pressure booster B ＇ and external pressure compression pump A ＇, it is provided with external pressure high pressure needle valve E ＇ between another miniature tube external pressure liquid port and fuel tank F of mould, fuel tank F is connected with internal pressure pump A and external pressure compression pump A ＇ respectively；One end that the counter sink of insert 5 and guide block 7 is opposing is flange plate-like, and its flange portion and guide block 7 are provided with packing ring 2；The flange portion of insert 5 is uniformly distributed three unthreaded holes and hole, symmetrical two location, and insert 5 is by being bolted on guide block 7 through unthreaded hole and packing ring 2, and by the locating dowel location through hole, location and packing ring 2；The circumference of blank holder 4 is uniformly distributed three unthreaded holes, and blank holder 4 is by being bolted in insert 5 through unthreaded hole；The material of O RunddichtringO is hardness is the fluorosioloxane rubber of 90A.
Wherein, the two ends of miniature tube both pass through the central through hole on the blank holder 4 at mould two ends and are arranged in the central through hole in insert 5.
Fuel tank F, internal pressure pump A, interior pressure booster B, intrinsic pressure check valve C, miniature tube inner chamber, intrinsic pressure high pressure needle valve E, fuel tank F constitute the intrinsic pressure pressure duct I of miniature tube；And fuel tank F, external pressure compression pump A ＇, outer pressure booster B ＇, external pressure check valve C ＇, miniature tube exocoel, external pressure high pressure needle valve E ＇, fuel tank F constitute miniature tube external pressure pressure duct II；
Before the test is conducted, first have to open high pressure needle valve E ＇ and close high pressure needle valve E, be exhausted operation；Being then shut off high pressure needle valve E ＇ and open high pressure needle valve E, be again exhausted operation, finally close high pressure needle valve E and high pressure needle valve E ＇, the gas that thus can guarantee that in device is all discharged.
In the process of test, there is two-way highly pressurised liquid to flow to miniature tube bidirectional hydraulic make-up mould D simultaneously.Wherein the flow direction of the highly pressurised liquid in intrinsic pressure pressure duct I is as follows: under the control of PLC, and internal pressure pump A starts working, it is provided that highly pressurised liquid.Highly pressurised liquid is through interior pressure booster B, it is possible to pressure is amplified to 6 times of original pressure, is then passed through intrinsic pressure check valve C and flows to inside miniature tube；Meanwhile, the flow direction of the highly pressurised liquid in external pressure pressure duct II is as follows: under being precisely controlled of PLC, and external pressure compression pump A ＇ starts simultaneously at work, it is provided that highly pressurised liquid.Highly pressurised liquid is through outer pressure booster B ＇, pressure can be amplified to 6 times of original pressure, it is then passed through external pressure check valve C ＇ and flows to outside miniature tube, with another road highly pressurised liquid the difference is that, the pressure of the highly pressurised liquid on this road is smaller (pressure of general pipeline II is 1/3rd of pipeline I).
The two-way highly pressurised liquid flow direction in miniature tube bidirectional hydraulic make-up mould D is as follows, the path wherein inner surface of miniature tube pressed: highly pressurised liquid enters from guide block 7 central through hole, the central through hole on sealing block 3 enters in miniature tube 8 with the central through hole in insert 5；The path that the outer surface of miniature tube is pressed: highly pressurised liquid is directly entered miniature tube 8 outer surface from the eccentric orfice of guide block 7.
Because high pressure needle valve E ＇ and high pressure needle valve E has been switched off, so two-way highly pressurised liquid cannot flow back to fuel tank F, and then at the surfaces externally and internally generation high pressure of miniature tube, by the pressure differential between miniature tube surfaces externally and internally, drive the bulging of miniature tube.In order to prevent highly pressurised liquid intercommunication inside and outside miniature tube, miniature tube be sealed.Encapsulation scheme is as follows: add O RunddichtringO between cylindrical shell 6 and guide block 7；The both sides of sealing block 3 are divided and are added O RunddichtringO；O RunddichtringO is added between blank holder 4 and insert 5；Packing ring 2 is avoided that insert 5 run-off the straight.By with this special encapsulating method, the pressure of 350MPa being sealed.
In accordance with the invention it is possible to process and the limit to miniature tube bidirectional hydraulic make-up are studied, when needing to produce the miniature tube of concrete shape, it is possible to directly cylindrical shell is replaced to corresponding mould and can realize producing.
Adopting this miniature tube bidirectional hydraulic make-up mould and device thereof can improve the plastic forming ability of miniature tube significantly, compared with traditional one-way hydraulic moulding process, the forming ability of miniature tube can improve about 10%.
Claims (6)
1. a miniature tube bidirectional hydraulic make-up mould, it is characterised in that: include guide block (7), cylindrical shell (6), insert (5), blank holder (4) and sealing block (3)；The end face of guide block (7) is provided with two holes, one of them hole is in the intrinsic pressure liquid port of miniature tube of guide block (7) center, another hole is in the miniature tube external pressure liquid port of guide block (7) eccentric part, guide block (7) other end has the annular groove that axle center is the center of circle of a guide block (7), guide block (7) is respectively fixedly disposed at the two ends of cylindrical shell (6) by annular groove, cylindrical shell (6) is provided with O RunddichtringO with the inner side at the position that guide block (7) contacts, guide block (7) arranges counter sink in the end face center arranging annular groove, counter sink and the intrinsic pressure liquid port of miniature tube is run through by the diameter central through hole less than or equal to 5mm at the axle center place of guide block (7)；nullThe counter sink secure fit of one end of insert (5) and guide block (7)，And positioned by locating dowel，One end that insert (5) is arranged in guide block (7) counter sink has counter sink，The center of this counter sink is provided with a central through hole running through insert (5)，The two ends of this central through hole are provided with O RunddichtringO，Sealing block (3) is fixedly installed in this counter sink，Sealing block (3) center is provided with central through hole，The annular groove that it is the center of circle with the axle center of sealing block (3) that the both ends of the surface of sealing block (3) are provided with，The distance in the external diameter of the annular groove of the side contacted with guide block (7) and the distance in sealing block (3) center of circle external diameter more than the side annular groove contacted with insert (5) and sealing block (3) center of circle，And the annular groove width of the side contacted with guide block (7) and the degree of depth both are greater than the width of side annular groove and the degree of depth that contact with insert，The annular groove at sealing block (3) two ends is provided with O RunddichtringO，Blank holder (4) center is provided with a central through hole，Blank holder (4) is fixed away from one end of guide block (7) with insert (5)，The intrinsic pressure liquid port of miniature tube on the guide block (7) at cylindrical shell (6) two ends、Central through hole on guide block (7)、Central through hole in insert (5)、Central through hole on sealing block (3) and the central through hole on blank holder (4) are all coaxial，The cavity conducting that external pressure liquid port on guide block (7) is surrounded by the diameter through hole less than or equal to 5mm and guide block (7) and cylindrical shell (6).
2. miniature tube bidirectional hydraulic make-up mould according to claim 1, it is characterized in that: one end that the counter sink of described insert (5) and guide block (7) is opposing is flange plate-like, and its flange portion and guide block (7) are provided with packing ring (2).
3. miniature tube bidirectional hydraulic make-up mould according to claim 2, it is characterized in that: the flange portion of described insert (5) is uniformly distributed three unthreaded holes and hole, symmetrical two location, insert (5) is by being bolted on guide block (7) through unthreaded hole and packing ring (2), and by the locating dowel location through hole, location and packing ring (2).
4. the miniature tube bidirectional hydraulic make-up mould according to claim 1 or 2 or 3, it is characterized in that: the circumference of described blank holder (4) is uniformly distributed three unthreaded holes, blank holder (4) passes through being bolted in insert (5) through unthreaded hole.
5. the miniature tube bidirectional hydraulic make-up mould according to claim 1 or 2 or 3, it is characterised in that: the material of described O RunddichtringO is hardness is the fluorosioloxane rubber of 90A.
6. miniature tube bidirectional hydraulic make-up mould according to claim 4, it is characterised in that: the material of described O RunddichtringO is hardness is the fluorosioloxane rubber of 90A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475121.1A CN104226778B (en) | 2014-09-17 | 2014-09-17 | Miniature tube bidirectional hydraulic make-up mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475121.1A CN104226778B (en) | 2014-09-17 | 2014-09-17 | Miniature tube bidirectional hydraulic make-up mould |
Publications (2)
| Publication Number | Publication Date |
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| CN104226778A CN104226778A (en) | 2014-12-24 |
| CN104226778B true CN104226778B (en) | 2016-07-06 |
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| CN201410475121.1A Expired - Fee Related CN104226778B (en) | 2014-09-17 | 2014-09-17 | Miniature tube bidirectional hydraulic make-up mould |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104707890B (en) * | 2015-03-24 | 2016-07-06 | 燕山大学 | Automobile axle housing part hydraulic expanding-forming two-stage supercharging system |
| CN106270096B (en) * | 2015-05-25 | 2018-01-05 | 南京理工大学 | Can axial supplement miniature pipe fitting hydraulic forming device |
| CN108213167A (en) * | 2018-03-14 | 2018-06-29 | 北京理工大学 | A kind of method of the swollen type of tubing differential pressure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB556471A (en) * | 1941-06-21 | 1943-10-06 | United States Pipe Foundry | Improvements in or relating to method and apparatus for radially contracting tubular metal bodies |
| JPS5744425A (en) * | 1980-08-12 | 1982-03-12 | Kobe Steel Ltd | Cold working method and apparatus of annular material |
| JPH1119729A (en) * | 1997-07-03 | 1999-01-26 | Nissan Motor Co Ltd | Bulging device and bulging method |
| CN102274886A (en) * | 2011-05-05 | 2011-12-14 | 北京航空航天大学 | Bidirectional pressurized pipe hydraulic-forming experimental device and application thereof |
| CN102240719B (en) * | 2011-05-06 | 2013-04-17 | 哈尔滨工业大学 | Device for improving pipe internal-pressure forming limit and method for improving pipe internal-pressure forming limit by utilizing same |
| CN202151652U (en) * | 2011-06-02 | 2012-02-29 | 佛山市南海兴迪机械制造有限公司 | Push head structure for internal high pressure forming of non-coaxial pipe |
| CN204093896U (en) * | 2014-09-17 | 2015-01-14 | 南京理工大学 | Miniature tube bidirectional hydraulic make-up mould |
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