CN104001781B - The forming device of a kind of high accuracy hollow unit and method - Google Patents
The forming device of a kind of high accuracy hollow unit and method Download PDFInfo
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- CN104001781B CN104001781B CN201410162317.5A CN201410162317A CN104001781B CN 104001781 B CN104001781 B CN 104001781B CN 201410162317 A CN201410162317 A CN 201410162317A CN 104001781 B CN104001781 B CN 104001781B
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- deformation mechanism
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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
- B21D26/047—Mould construction
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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
The present invention relates to a kind of forming device and the method for Precise Rectangular Section hollow unit, the inventive method is as follows: step one mould prepares, and adds reversible deformation structure on mould, and check valve installed by drift；Initial pipe is put into mold cavity, matched moulds, end seal by step 2；The internal fluid-filling medium of step three-dimensional pipe；Step 4 Anti-deformation mechanism is to moving to forming miniature petal shape；Step 5 reversible deformation structure rollback flattens to initial position, petal shape depressed area；Repeat step 4, five to shaping required form；Lay down internal fluid pressure, open mould, take out part.By arranging Anti-deformation mechanism in a mold, the repetition and the accumulation that realize petal shape utilize, eliminating the while of determining to roll effect of friction, reduce forming pressure, avoid the generation of cracking defect, improve evenness of wall thickness, to meet the fields such as Aero-Space to this class A of geometric unitA high-precision requirement in d type precision and evenness of wall thickness.
Description
Technical field
The present invention relates to mechanical manufacturing field, particularly to forming device and the method for a kind of high accuracy hollow unit.
Background technology
At present, square-section hollow unit is preferably to carry version, for bending resistance, antitorque load, the failure mode of square-section hollow unit is minimum, can active balance stabilized soil pavement Problem of Failure, and then obtain the limit bending resistance of maximum, shear resistant capacity, therefore, square-section hollow unit is the important feature form of Aeronautics and Astronautics and motor vehicle equipment.
In current square-section hollow unit manufacturing process, typically being shaped by modes such as punching press-welding and inner high voltage direct forming, first kind of way introduces two longitudinal seams, destroys the integrity of structure and causes sweating heat to deform；The second way then needs high forming pressure, straight flange district is caused to there is stress concentration with the transition position of fillet area, wall thickness reduction the most even ftractures, and this class A of geometric unitA affects the penetration ability of aircraft equipment, attack precision and aeroperformance in terms of shape with precision, particularly fatigue behaviour.
For avoiding being restricted by forming pressure and improving evenness of wall thickness, there is scholar to propose by petal preforming and improve fillet crystallized ability, but which mainly plays the shaping pressure reducing the shaping initial stage, and evenness of wall thickness effect is little to improving, and owing to petal shape is realized by preforming, therefore special preforming operation is needed, particularly petal shape only works at the shaping initial stage, owing to only just playing the effect reducing shaping pressure before petal cross sectional shape disappears, it is thus desirable to petal feature the most obvious, anti-deformation is bigger, this weakens the effect of shaping thrust on the contrary.
Summary of the invention
The purpose of the present invention is aiming at the drawbacks described above that prior art exists, forming device and the method for a kind of high accuracy hollow unit are provided, by arranging Anti-deformation mechanism in a mold, the repetition and the accumulation that realize petal shape utilize, determine the effect of rolling simultaneously eliminate friction, reduce forming pressure, it is to avoid the generation of cracking defect, improve evenness of wall thickness, to meet the fields such as Aero-Space to this class A of geometric unitA high-precision requirement on form accuracy and evenness of wall thickness.
A kind of manufacturing process of high accuracy hollow unit, its technical scheme is to comprise the following steps realization:
Step one: mould prepares, first according to Components Shape need design lower mold, mold, left drift and right drift, lower mold is connected with the lower table of forcing press, and mold is connected with the top shoe of forcing press, Filled Dielectrics hole offered by drift, and is connected with high-voltage power supply by check valve；
Step 2: arrange Anti-deformation mechanism on mould, Anti-deformation mechanism one end is towards mold cavity, and mold cavity is stretched out in one end, and can realize along feeding and the retrogressing needing direction；
Step 3: initial pipe prepares, the suitably initial pipe of preferred dimension, its main points are that the section girth of initial pipe is close with the section girth of whole drip molding, and the section girth of general initial pipe should be equal to 0.7-1.2 times of whole drip molding section girth；
Step 4: initial pipe is put into mold cavity, matched moulds, drift is fed to blank end vertically and seals, applies mold clamping force；
Step 5: be full of to pipe die cavity from Filled Dielectrics hole to the internal liquid medium of filling of pipe；
Step 6: Anti-deformation mechanism does to movement inside mold cavity, and pipe straight wall position forms fine pits, and internal liquid volume is compressed continuously, and fluid pressure raises, and material is filled to fillet position and shaped；
Step 7: Anti-deformation mechanism is progressively retreating to initial position, then internal liquid pressure is raised, under fluid pressure effect, the depression at straight wall position constantly flattens, define horizontal thrust tangentially, simultaneously because the existence pipe of depression does not contacts with mould, eliminate the pinning effect of friction, material is very easy to be pushed to radius area, and fillet reduces further；
Step 8: repeat step 6 and step 7, until it reaches whole drip molding shape；
Step 9: open check valve, lays down internal liquid, and ram retracts to drip molding can conveniently take out, and opens mould, takes out drip molding.
Above-mentioned lower mold is connected with the lower table of forcing press, and mold is connected with the top shoe of forcing press, installs check valve additional between left drift and high-voltage power supply.
The width of Anti-deformation mechanisma 1It is 0.1a~0.3a, highlyb 1It is 0.1b~0.3b, lengthl 1It is 0.9l~1.0l, and can move forward and backward action with ejecting mechanism.
Anti-deformation mechanism towards inside mold cavity to movement, pipe straight wall position forms fine pits, pipe shape of cross section becomes micro-petal shape, simultaneously because internal liquid volume is compressed continuously, fluid pressure raises, and material is filled to fillet position, radius of corner constantly reduces and gradually shapes, wherein, the drafts of Anti-deformation mechanism 9 and Anti-deformation mechanism 13 is 0.01a-0.3a, and the drafts of Anti-deformation mechanism 11 and Anti-deformation mechanism 15 is 0.01b-0.3b.
The forming device of the high accuracy hollow unit that the present invention mentions, including lower table, lower mold, Filled Dielectrics hole, left drift, mold, top shoe, right drift, four ejecting mechanisms, four Anti-deformation mechanisms, high-voltage power supply, check valve, lower mold is connected with the lower table of forcing press, mold is connected with the top shoe of forcing press, check valve is installed additional between left drift and high-voltage power supply, mould arranges four Anti-deformation mechanisms, one end of four Anti-deformation mechanisms is towards middle mold cavity, the other end stretches out mold cavity, and be connected with four ejecting mechanisms of forcing press；Left drift and right drift are fed to blank end vertically and seal, and apply mold clamping force.
The width of above-mentioned Anti-deformation mechanisma 1It is about 0.1a~0.3a, highlyb 1It is about 0.1b~0.3b, lengthl 1It is 0.9l~1.0l。
Compared with prior art, it provides the benefit that the present invention:
(1) miniature petal shape can produce great horizontal thrust, greatly reduces fillet shaping pressure, has broken such part and has depended on the production status of supercharger nominal capacity unduly；
(2) miniature petal shape can produce great horizontal thrust, makes component be in hoop pressure stress state, and this stress state avoids cracking defect common in the art, drip molding dense structure, and mechanical performance is improved；
(3) miniature petal shape is in whole forming process, it is repeatedly formed flattening, blank deformation position and mould inner surface is made to be in empty contact condition all the time, eliminate the frictional force inhibitory action to metal flow, improve deformation uniformity, the evenness of wall thickness of drip molding is guaranteed, and destroys little to drip molding surface quality；
(4) drip molding is to shape under just deforming the alternating action with reversible deformation, can make full use of the Bauschinger effect of material, and the resilience of suppression component, drip molding d type precision is high；
(5) pipe vertical wall section is in along thick all the time to uniform compressive stress state, can guarantee that this position both participates in plastic deformation from start to finish, coordinates the uniformity of metal flow, be further ensured that the evenness of wall thickness of drip molding.
(6) realized by Anti-deformation mechanism due to miniature petal shape, it is not necessary to preforming operation, and the optimal miniature petal shape needed for the different distortion stage can be realized flexibly by controlling anti-deformation；
The present invention is reasonable in design, reliable operation, effect notable, has stronger promotional value.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the forming device of the present invention；
Accompanying drawing 2 is the A-A structure chart of the forming device of the present invention；
Accompanying drawing 3 is mould matched moulds deformation schematic diagram after applying end seal；
Accompanying drawing 4 is the B-B structural representation of Fig. 3；
Accompanying drawing 5 is fill liquid medium and then forms internal pressure schematic diagram；
Accompanying drawing 6 is the B-B structural representation of Fig. 5；
Accompanying drawing 7 facilitates micro-petal shape schematic diagram for Anti-deformation mechanism；
Accompanying drawing 8 retreats complete schematic diagram for Anti-deformation mechanism；
Accompanying drawing 9 is for rising high pressure to micro-petal shape disappearance schematic diagram；
Accompanying drawing 10 opens situation schematic diagram for mould；
Accompanying drawing 11 is the B-B structure chart of Figure 10；
In upper figure: lower table 1, lower mold 2, Filled Dielectrics hole 3, left drift 4, mold 5, top shoe 6, right drift 7, ejecting mechanism 8,10,12,14, Anti-deformation mechanism A(9), Anti-deformation mechanism B(11), Anti-deformation mechanism C(13), Anti-deformation mechanism D(15), high-voltage power supply 16, check valve 17.
Detailed description of the invention
A kind of manufacturing process of high accuracy hollow unit, its technical scheme is to comprise the following steps realization:
Step one: mould prepares, first according to the lower mold 2, mold 5, left drift 4 and the right drift 7 that need design response of Components Shape, above-mentioned same as the prior art, this does not repeats.Lower mold 2 is connected with the lower table 1 of forcing press, and mold 5 is connected with the top shoe 6 of forcing press, installs check valve 17 additional between left drift 4 and high-voltage power supply 16；
Step 2: Anti-deformation mechanism A(9 is set on mould), Anti-deformation mechanism B(11), Anti-deformation mechanism C(13), Anti-deformation mechanism D(15), Anti-deformation mechanism one end is towards mold cavity, mold cavity is stretched out in one end, and is connected with the ejecting mechanism 8,10,12,14 of forcing press.Its main points are the width of Anti-deformation mechanisma 1It is about 0.1a~0.3a, highlyb 1It is about 0.1b~0.3b, lengthl 1It is 0.9l~1.0l.And can move forward and backward action with ejecting mechanism；
Step 3: initial pipe, selects the suitably initial pipe of size, and its main points are that the section girth of initial pipe is close with the section girth of whole drip molding, and the section girth of general initial pipe should be equal to 0.7-1.2 times of whole drip molding section girth；
Step 4: initial pipe is put into mold cavity, matched moulds, left drift 4 and right drift 7 are fed to blank end vertically and seal, apply mold clamping force；
Step 5: by Filled Dielectrics hole 3 to pipe internal filling liquid medium is full of to die cavity in pipe；
Step 6: Anti-deformation mechanism A(9), Anti-deformation mechanism B(11), Anti-deformation mechanism C(13), Anti-deformation mechanism D(15) towards inside mold cavity to movement, pipe straight wall position forms fine pits, pipe shape of cross section becomes micro-petal shape, simultaneously because internal liquid volume is compressed continuously, fluid pressure raises, material is filled to fillet position, radius of corner constantly reduces and gradually shapes, its main points are Anti-deformation mechanism A(9) and Anti-deformation mechanism C(13) drafts be 0.01a-0.3a, Anti-deformation mechanism B(11) and Anti-deformation mechanism D(15) drafts be 0.01b-0.3b；
Step 7: Anti-deformation mechanism A(9), Anti-deformation mechanism B(11), Anti-deformation mechanism C(13), Anti-deformation mechanism D(15) be progressively retreating to initial position, raise internal liquid pressure, under fluid pressure effect, the depression at straight wall position constantly flattens, simultaneously because the horizontal thrust tangentially formed of fluid pressure, metal material is pushed into radius area further；
Step 8: repeat step 6 and step 7, until it reaches required fillet size shapes required member section shape；
Step 9: open check valve 17, lays down internal liquid, and left drift 4 and right drift 7 retreat to not affecting drip molding taking-up, open mould, take out part.
It addition, above-mentioned blank tube material is aluminium alloy, magnesium alloy, rustless steel, high-strength steel or titanium alloy, shaping medium can be water, emulsion, resistance to force feed or gas.
Claims (2)
1. a manufacturing process for high accuracy hollow unit, is characterized in that comprising the following steps realization:
Step one: mould prepares, first according to Components Shape need design lower mold, mold, left drift and right drift, lower mold is connected with the lower table of forcing press, and mold is connected with the top shoe of forcing press, Filled Dielectrics hole offered by left and right drift, and is connected with high-voltage power supply by check valve；
Step 2: arrange Anti-deformation mechanism on mould, Anti-deformation mechanism one end is towards mold cavity, and mold cavity is stretched out in one end, and can realize along feeding and the retrogressing needing direction；
Step 3: initial pipe prepares, the suitably initial pipe of preferred dimension, its main points are that the section girth of initial pipe is close with the section girth of whole drip molding, and the section girth of initial pipe should be equal to 0.7-1.2 times of whole drip molding section girth；
Step 4: initial pipe is put into mold cavity, matched moulds, left and right drift is fed to blank end vertically and seals, applies mold clamping force；
Step 5: be full of to pipe die cavity from Filled Dielectrics hole to the internal liquid medium of filling of pipe；
Step 6: Anti-deformation mechanism does to movement inside mold cavity, and pipe straight wall position forms fine pits, and internal liquid volume is compressed continuously, and fluid pressure raises, and material is filled to fillet position and shaped；
Step 7: Anti-deformation mechanism is progressively retreating to initial position, then internal liquid pressure is raised, under fluid pressure effect, the depression at straight wall position constantly flattens, define horizontal thrust tangentially, simultaneously because the existence pipe of depression does not contacts with mould, eliminate the anchoring effect of friction, material is easily pushed to radius area, and fillet reduces further；
Step 8: repeat step 6 and step 7, until it reaches whole drip molding shape；
Step 9: open check valve, lays down internal liquid, and left and right ram retracts to drip molding can conveniently take out, and opens mould, takes out drip molding.
The manufacturing process of high accuracy hollow unit the most according to claim 1, it is characterized in that: Anti-deformation mechanism towards inside mold cavity to movement, pipe straight wall position forms fine pits, pipe shape of cross section becomes micro-petal shape, simultaneously because internal liquid volume is compressed continuously, fluid pressure raises, material is filled to fillet position, radius of corner constantly reduces and gradually shapes, wherein, Anti-deformation mechanism A(9) and Anti-deformation mechanism C(13) drafts be 0.01a-0.3a, Anti-deformation mechanism B(11) and Anti-deformation mechanism D(15) drafts be 0.01b-0.3b, a is the half of mold die cavity width, b is the degree of depth of lower mold die cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410162317.5A CN104001781B (en) | 2014-04-22 | 2014-04-22 | The forming device of a kind of high accuracy hollow unit and method |
| CN201610660189.6A CN106216479A (en) | 2014-04-22 | 2014-04-22 | A kind of manufacturing process of hollow unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410162317.5A CN104001781B (en) | 2014-04-22 | 2014-04-22 | The forming device of a kind of high accuracy hollow unit and method |
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| CN201610660189.6A Division CN106216479A (en) | 2014-04-22 | 2014-04-22 | A kind of manufacturing process of hollow unit |
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| CN104001781A CN104001781A (en) | 2014-08-27 |
| CN104001781B true CN104001781B (en) | 2017-01-04 |
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| CN201410162317.5A Expired - Fee Related CN104001781B (en) | 2014-04-22 | 2014-04-22 | The forming device of a kind of high accuracy hollow unit and method |
| CN201610660189.6A Pending CN106216479A (en) | 2014-04-22 | 2014-04-22 | A kind of manufacturing process of hollow unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104624769B (en) * | 2015-01-06 | 2017-06-09 | 哈尔滨工业大学（威海） | A kind of interior pressing formation and heat treatment integrated apparatus and method |
| CN104690572B (en) * | 2015-03-17 | 2017-02-01 | 四川明日宇航工业有限责任公司 | Weakly rigid aviation structural member small stress filling and shock absorption clamping machining method |
| CN104722634B (en) * | 2015-03-24 | 2016-08-24 | 张家港市通润机械有限公司 | A kind of preparation technology of no-welding-seam rustless steel container |
| CN105750368A (en) * | 2016-02-23 | 2016-07-13 | 河南永福德科技股份有限公司 | Pressed bend shaping method and device |
| CN106270093B (en) * | 2016-09-09 | 2019-04-16 | 哈尔滨工业大学 | A kind of hollow blade viscoelastroplasticity soft mode internal pressure manufacturing process and forming device |
| CN111390005B (en) * | 2020-03-24 | 2021-01-29 | 燕山大学 | Thin-wall straight pipe strengthening device and strengthening method |
| CN111451351B (en) * | 2020-04-30 | 2022-08-09 | 初冠南 | Forming and integrating method for tubular part |
| CN114029389A (en) * | 2021-11-09 | 2022-02-11 | 北京航星机器制造有限公司 | Special-shaped thin-wall cavity profile composite precise forming device and method |
| CN114985572A (en) * | 2022-04-20 | 2022-09-02 | Ugax工程有限公司 | Battery aluminum shell and production process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0895820A1 (en) * | 1997-08-06 | 1999-02-10 | Sumitomo Metal Industries, Ltd. | Method and apparatus for hydroforming metallic tube |
| CA2553622A1 (en) * | 2004-01-16 | 2005-07-28 | Kai-Uwe Dudziak | Device and method for producing a hollow section or shell section by means of hydroforming |
| CN102806248A (en) * | 2012-08-06 | 2012-12-05 | 哈尔滨工业大学 | Device and method for testing real-time changes of fillet radius along with internal pressure in internal high-pressure forming process |
| CN103624131A (en) * | 2012-08-22 | 2014-03-12 | 赵伟星 | Technology for manufacturing cold extruding collecting tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3990574B2 (en) * | 2002-01-21 | 2007-10-17 | 新日本製鐵株式会社 | Hydroform processing method |
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2014
- 2014-04-22 CN CN201410162317.5A patent/CN104001781B/en not_active Expired - Fee Related
- 2014-04-22 CN CN201610660189.6A patent/CN106216479A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0895820A1 (en) * | 1997-08-06 | 1999-02-10 | Sumitomo Metal Industries, Ltd. | Method and apparatus for hydroforming metallic tube |
| CA2553622A1 (en) * | 2004-01-16 | 2005-07-28 | Kai-Uwe Dudziak | Device and method for producing a hollow section or shell section by means of hydroforming |
| CN102806248A (en) * | 2012-08-06 | 2012-12-05 | 哈尔滨工业大学 | Device and method for testing real-time changes of fillet radius along with internal pressure in internal high-pressure forming process |
| CN103624131A (en) * | 2012-08-22 | 2014-03-12 | 赵伟星 | Technology for manufacturing cold extruding collecting tube |
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| Publication number | Publication date |
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| CN104001781A (en) | 2014-08-27 |
| CN106216479A (en) | 2016-12-14 |
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