CN100500320C - Device for improving forming limit of hydromechanical drawing of sheet material and method thereof - Google Patents
Device for improving forming limit of hydromechanical drawing of sheet material and method thereof Download PDFInfo
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- CN100500320C CN100500320C CNB2008100645379A CN200810064537A CN100500320C CN 100500320 C CN100500320 C CN 100500320C CN B2008100645379 A CNB2008100645379 A CN B2008100645379A CN 200810064537 A CN200810064537 A CN 200810064537A CN 100500320 C CN100500320 C CN 100500320C
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Abstract
The invention discloses a device and a method for improving the limit of hydraulic deep drawing molding of plank stuff, which relates to a hydraulic deep drawing molding device of metal plank stuff and a method thereof, and solves the problem that as the deep drawing plate parts such as the plate parts made of magaluma have large deep drawing rate and deformed plank flange parts, the bottom of the deep drawing plate parts is easy to fracture and has limitation to the molding limit due to overlarge pulling stress. A stamping ring (1) is arranged at the upper part of a cavity die (3), a die space (1-1) of the stamping ring (1) has the same shaft and the same pore diameter with a die space (3-1) of the cavity die (3), one end of a male die (4) is arranged in the die space (1-1), one end of a dowel steel (5) is arranged between the stamping ring (1) and the cavity die (3), and the other end of the dowel steel (5) is fixedly connected with a spring (6). The device and the method for improving the limit of the hydraulic deep drawing molding of plank stuff realize the radial pressure exertion and controllability at a position of a deformed region at the outer side of the plate parts, are favorable for the deep drawing molding of the plate parts with complicated shapes, have simplicity, reliability, lower cost and easy implementation, and can remarkably improve the limit of the deep drawing molding of the plate parts.
Description
Technical field
The present invention relates to a kind of sheet metal liquid filling deep-drawing forming device and method.
Background technology
The sheet material hydro-mechanical drawing is to adopt liquid to replace the rigidity die as the power transmission medium, make sheet material under the fluid pressure effect, recline punch to realize the manufacturing technology of sheet metal part shaping, flexible forming technology as a kind of advanced person, have advantages such as forming limit height, dimensional accuracy height and surface quality are good, be particularly suitable for being shaped processing structure complex-shaped part and inductile material are as aluminium alloy, magnesium alloy, high temperature alloy and labyrinth welding plate etc.
Compare with materials such as deep punching steels, the hardenability value value of light material such as aluminium alloy, magnesium alloy and different in nature exponential quantity is little, forming property is poor, the low bottleneck that becomes its processing that is shaped of plasticity index, therefore, the hydro-mechanical drawing technology that improves the part forming limit, minimizing shaping passage is one of some effective of inductiles such as aluminium alloy, magnesium alloy, the shaping of difficult shaping light material plate material parts, many thin-walled drawing parts utilize the hydro-mechanical drawing technology to be shaped and still are restricted because pull and stretch causes the drawing part bottom to break because of tension is excessive than big, the distortion of blank flange section.In order to improve the part forming limit, many liquid filling deep-drawing forming new technologies have been proposed, excessive liquid chamber pressure can cause breaking of curved surface part shaping initial stage suspension area in the hydro-mechanical drawing technology of circumferentially pressurizeing; Around the blank deformed area, apply radial pressure by highly pressurised liquid and can improve the part forming limit, but mould therefor and equipment are all complicated.
Based on the above, publication number is CN1903474A, open day be that the application for a patent for invention on January 31st, 2007 has proposed a kind ofly can improve employed processing unit (plant) of plate material parts forming limit and processing method, processing unit (plant) described in the literary composition is the hydro-mechanical drawing device that highly pressurised liquid is applied circumferential pressure in the flange outer rim of workpiece, the problem that this device exists is: 1, overflow between liquid chamber hydraulic pressure and the circumferential hydraulic pressure in flange district easily takes place, cause the UNICOM of two hydraulic cavities, make applying of circumferential hydraulic pressure can not get guaranteeing preferably, also overflow can take place in the course of the work between punch and the blank holder simultaneously with independent control; 2, hydraulic coupling is less for the circumferential pressure effect of sheet part flange end, and difficulty reaches desirable effect; 3, the circumferential hydraulic coupling P1 of this device is generally steady state value, and will obtain carrying out and the hydraulic coupling P1 that changes then needs to adopt independent hydraulically controlled control system with pull and stretch, and its optional equipment is very complicated, is difficult for implementing.
Summary of the invention,
The purpose of this invention is to provide a kind of device and method that improves forming limit in hydromechanical deep drawing of sheet material, with solve easy generation overflow, optional equipment complexity that plate class setup for drawing parts such as existing almag exist, be difficult for implementing, hydraulic coupling for the circumferential pressure effect of sheet part flange end the less and excessive problem of tension radially.A kind of device that improves forming limit in hydromechanical deep drawing of sheet material is made up of blank holder, die, punch, transmission rod and spring; Blank holder places the top of die, and the die cavity of blank holder is coaxial with the concave die cavity of die and the aperture is identical, and an end of punch places in the die cavity, and an end of transmission rod places between blank holder and the die, and the other end and the spring of transmission rod are affixed.
A kind of method that improves forming limit in hydromechanical deep drawing of sheet material is finished by following steps: one, liquid is injected in the concave die cavity; Two, plate is placed on the die; Three, blank holder is placed on the plate, and apply pressure-pad-force; Four, an end of transmission rod is placed on the outer end of plate; Five, the other end and the spring of transmission rod is affixed; Six, punch moves down, and sheet metal deformation also flows in the concave die cavity.
The present invention has following beneficial effect: the present invention has realized applying and controllability of plate accessory outside place, deformed area radial pressure, having avoided applying radial pressure by highly pressurised liquid is difficult to implement, help realizing the drawing and forming of complicated shape plate accessory, the present invention is simple and reliable, cost is lower, be easy to realization, and can improve the drawing forming limit of plate accessory significantly.
Description of drawings
Fig. 1 is an overall structure cutaway view of the present invention, and Fig. 2 is the schematic diagram of forming process end of a period state of the present invention.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1 and Fig. 2 present embodiment is described, present embodiment is made up of blank holder 1, die 3, punch 4, transmission rod 5 and spring 6; Blank holder 1 places the top of die 3, the die cavity 1-1 of blank holder 1 is coaxial with the concave die cavity 3-1 of die 3 and the aperture is identical, one end of punch 4 places in the die cavity 1-1, and an end of transmission rod 5 places between blank holder 1 and the die 3, and the other end of transmission rod 5 and spring 6 are affixed.Plate is placed between die and the blank holder, and make the outer end of plate affixed with the biography vertical rod, transmission rod is along the circumferential arrangement of plate, the quantity of transmission rod can specifically be determined according to the shape and the material of plate, difference according to the sheet forming material, can select the spring of different-stiffness and length, by transmission rod to applying radial pressure around the deformed area, plate flange position, the stress state of deformed area is changed, the subregion of flange produces compression, thereby reduce the radially tension of sheet metal deep drawing deformed area, improve forming limit.
The specific embodiment two: in conjunction with Fig. 1 and Fig. 2 present embodiment is described, has been horizontally disposed with liquid injection hole 3-2 in the present embodiment on die 3, liquid injection hole 3-2 communicates with concave die cavity 3-1.So be provided with is for concave die cavity being injected liquid, realizing the liquid filling deep-drawing forming of plate.
The specific embodiment three: in conjunction with Fig. 1 and Fig. 2 present embodiment is described, present embodiment is finished by following steps: one, liquid is injected in the concave die cavity 3-1; Two, plate 2 is placed on the die 3; Three, blank holder 1 is placed on the plate 2, and apply pressure-pad-force; Four, an end of transmission rod 5 is placed on the outer end of plate 2; Five, the other end and the spring 6 of transmission rod 5 is affixed; Six, punch 4 moves down, and plate 2 distortion also flow in the concave die cavity 3-1.During initial pull and stretch, spring is in compressive state, the elastic force that puts on plate is bigger, along with the carrying out of pull and stretch, spring extends gradually, and elastic force reduces gradually, finish up to pull and stretch, elastic force is reduced to zero, puts on this force variation rule of plate, with the sheet metal deformation district radially the Changing Pattern of tension in drawing process conform to.Plate has suppressed the radially tension that the sheet metal deformation district produces in the present embodiment under the effect of radial pressure, has alleviated the burden of plate force transmission region, so limit reduction is significantly improved.
The specific embodiment four: plate 2 is aluminium, aluminium alloy, magnesium alloy or titanium alloy in the present embodiment.
Claims (4)
1, a kind of device that improves forming limit in hydromechanical deep drawing of sheet material, it is made up of blank holder (1), die (3), punch (4), transmission rod (5) and spring (6); Blank holder (1) places the top of die (3), the die cavity (1-1) of blank holder (1) is coaxial with the concave die cavity (3-1) of die (3) and the aperture is identical, one end of punch (4) places in the die cavity (1-1), an end that it is characterized in that transmission rod (5) places between blank holder (1) and the die (3), and the other end of transmission rod (5) and spring (6) are affixed.
2, a kind of device that improves forming limit in hydromechanical deep drawing of sheet material according to claim 1 is characterized in that being horizontally disposed with liquid injection hole (3-2) on die (3), liquid injection hole (3-2) communicates with concave die cavity (3-1).
3, improve the method for forming limit in hydromechanical deep drawing of sheet material with the described device of claim 1, it is characterized in that it is finished by following steps: one, liquid is injected in the concave die cavity (3-1); Two, plate (2) is placed on the die (3); Three, blank holder (1) is placed on the plate (2), and apply pressure-pad-force; Four, an end of transmission rod (5) is placed on the outer end of plate (2); Five, the other end and the spring (6) of transmission rod (5) is affixed; Six, punch (4) moves down, and plate (2) distortion also flows in the concave die cavity (3-1).
4, a kind of method that improves forming limit in hydromechanical deep drawing of sheet material according to claim 3 is characterized in that being aluminium, aluminium alloy, magnesium alloy or titanium alloy at the plate described in the step 2 (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100645379A CN100500320C (en) | 2008-05-19 | 2008-05-19 | Device for improving forming limit of hydromechanical drawing of sheet material and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100645379A CN100500320C (en) | 2008-05-19 | 2008-05-19 | Device for improving forming limit of hydromechanical drawing of sheet material and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101274343A CN101274343A (en) | 2008-10-01 |
| CN100500320C true CN100500320C (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2008100645379A Expired - Fee Related CN100500320C (en) | 2008-05-19 | 2008-05-19 | Device for improving forming limit of hydromechanical drawing of sheet material and method thereof |
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| CN (1) | CN100500320C (en) |
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| CN101788432B (en) * | 2010-01-08 | 2013-09-18 | 上海工程技术大学 | Convenient and general multiparameter wedge method for testing metal plate material stretchability |
| CN101995437B (en) * | 2010-09-27 | 2012-06-20 | 江苏大学 | Method for extracting features of crack acoustic emission signal of drawing part |
| CN102248066A (en) * | 2011-06-09 | 2011-11-23 | 北京航空航天大学 | Drawing and hydraulic integrated forming method |
| CN102248057B (en) * | 2011-06-23 | 2013-12-25 | 哈尔滨工业大学 | Device and method capable of reducing hydrodynamic deep drawing pressure pad force |
| US8683836B2 (en) * | 2011-07-29 | 2014-04-01 | Ford Global Technologies, Llc | Method and apparatus for forming sharp styling lines on metal panels |
| CN102601203A (en) * | 2012-03-23 | 2012-07-25 | 哈尔滨工业大学 | Device for improving plate forming limit and method for improving plate forming limit by aid of device |
| CN103551443B (en) * | 2013-10-30 | 2016-02-03 | 上海理工大学 | Hydro-mechanical drawing mould and hydro-mechanical drawing method thereof |
| CN104190776B (en) * | 2014-06-25 | 2016-03-09 | 哈尔滨工业大学 | A kind of liquid filling deep-drawing forming method improving large thin-wall curved-surface piece profile precision |
| CN107160660A (en) * | 2017-07-07 | 2017-09-15 | 深圳市亚美三兄吸塑有限公司 | The compression-moulding methods and mould of carbon fiber product |
| CN107716689B (en) * | 2017-11-27 | 2019-07-16 | 哈尔滨工业大学 | Positive drawing-under a kind of plate inflation back pressure effect is backwards to the compound superplastic forming device of bulging and its method |
| CN108580636A (en) * | 2018-02-26 | 2018-09-28 | 辽宁科技大学 | A kind of preparation method and device of the micro- stamping parts of cupuliform that hydraulic pressure is added |
| CN108723158A (en) * | 2018-05-30 | 2018-11-02 | 江苏盖之宝包装科技有限公司 | A kind of cavity plate hydro-drawing device |
| CN109954783A (en) * | 2019-04-10 | 2019-07-02 | 哈尔滨理工大学 | A kind of double step cylindrical member secondary deep-drawing method for numerical simulation |
| CN111299395B (en) * | 2019-11-28 | 2021-12-24 | 哈尔滨理工大学 | Magnetic medium auxiliary plate blanking forming device and method |
| CN110860598B (en) * | 2019-11-28 | 2021-08-06 | 哈尔滨理工大学 | Method for improving warm hydromechanical deep drawing forming die attaching performance through active radial pressurization |
| CN111167915B (en) * | 2020-01-12 | 2022-03-18 | 哈尔滨理工大学 | Method for improving bottom forming precision of complex three-dimensional thin-wall part |
| CN111531041B (en) * | 2020-04-30 | 2021-07-27 | 哈尔滨理工大学 | Magnetic medium assisted tailor-welded blank deep-drawing forming device and forming method |
| CN111745029A (en) * | 2020-07-06 | 2020-10-09 | 哈尔滨工业大学 | Method and device for forming curved surface piece with radial difference thickness |
| CN113732154B (en) * | 2021-09-18 | 2023-08-04 | 中航西安飞机工业集团股份有限公司 | Twice deep drawing forming method for long annular lip mouth with beak-shaped middle part of deep U-shaped section |
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2008
- 2008-05-19 CN CNB2008100645379A patent/CN100500320C/en not_active Expired - Fee Related
Patent Citations (4)
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|---|---|---|---|---|
| EP1147833A2 (en) * | 2000-04-20 | 2001-10-24 | Schuler SMG GmbH & Co. KG | Method and apparatus for deep-drawing sheet-metal workpieces |
| CN2464470Y (en) * | 2001-01-20 | 2001-12-12 | 中国科学院金属研究所 | Hydraulic sheet material formation mould |
| CN1631571A (en) * | 2004-12-22 | 2005-06-29 | 重庆工学院 | Sheet bar reciprocating type forming method based on force transferring by viscoelastic medium |
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| CN101274343A (en) | 2008-10-01 |
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Application publication date: 20081001 Assignee: WUHAN HUAZI DONGJIANG AUTO PARTS CO., LTD. Assignor: Harbin University of Science and Technology Contract record no.: 2012420000123 Denomination of invention: Device for improving forming limit in hydromechanical deep drawing of sheet material and method thereof Granted publication date: 20090617 License type: Exclusive License Record date: 20120905 |
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Assignee: WUHAN HUAZI DONGJIANG AUTO PARTS CO., LTD. Assignor: Harbin University of Science and Technology Contract record no.: 2012420000123 Date of cancellation: 20130619 |
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