CN103878228B - Sheet material flexible multipoint forming device - Google Patents
Sheet material flexible multipoint forming device Download PDFInfo
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- CN103878228B CN103878228B CN201410065771.9A CN201410065771A CN103878228B CN 103878228 B CN103878228 B CN 103878228B CN 201410065771 A CN201410065771 A CN 201410065771A CN 103878228 B CN103878228 B CN 103878228B
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Abstract
The present invention relates to a kind of sheet material flexible multipoint forming device, comprising: hydraulic container, hydraulic container has opening; Flexible membrane, is arranged on opening part, and the inner sealing of hydraulic container is formed hydraulic cavities by flexible membrane; Pressure regulating unit, with hydraulic chamber into communication; Multiple presser unit, relative flexibility diaphragm is arranged actively; Multiple presser unit is moved to the direction of flexible membrane, thus by the sheet material to be formed that is arranged between flexible membrane and presser unit along with flexible membrane is to the distortion deform in same pace in hydraulic cavities, until sheet material to be formed forms predetermined shape.Because flexible membrane of the present invention can provide the real-time, tunable and uniform normal force matched, be treated as based plate and form effective Normal Constraint, essentially eliminate the suspension area in carved punched forming process, can effectively suppress plate wrinkling.Workpiece surface quality after shaping is good, thickness even, without defects such as impressions.
Description
Technical field
The present invention relates to a kind of curved surface sheet material molding field, particularly relate to a kind of sheet material flexible multipoint forming device.
Background technology
Flexible manufacturing is the development trend of processing industry, and wherein multi-point forming technique is a kind of advanced manufacturing technology for plate accessory three-dimensional curve generation, and at present, research institution both domestic and external conducts in-depth research it.
The forming face of shaping dies is divided into a series of simple shape, discrete arrangement, adjustable for height pressure head formation dot matrix mould by CN2548792Y, constructs the forming face of mould, realizes sheet material forming.The maximum advantage of this device is to go out different profile surfaces by regulating arbitrarily the placement configurations of pressure head, realizes the shaping of Three-dimensional Sheet Metal.But at the various curved surface of shaping; especially when sphere, the conical surface etc. have outstanding position product; the initial stage that sheet material is being shaped always having considerable part in forming process is in vacant state; now the punch of punch die or die all do not contact with the overhanging portion of sheet material and can not implement effective Normal Constraint to it; cause being easy to occur the defects such as wrinkling; not only have a strong impact on the life-span of the forming quality of drip molding, precision and mould, and sometimes directly cause forming process to carry out.
CN1994611A adopts elastic insert, propose in multi-point forming, plate to be clipped in certain elastic insert to form, the distortion of elastic insert is relied on to apply Normal Constraint to plate, but in fact, wrinkling is more the initial stage appearing at shaping, and this elastic insert is only substantially pressed against at upper/lower die or perhaps just works in the latter stage be shaped, the wrinkling problem that is shaped can not be solved completely.
CN2460239Y proposes one and does not carry out position adjustment to pressure head in advance, and in formation displacement and speed adjustment are carried out simultaneously to all drifts, realize loading, the device of distortion, this device can realize applying Normal Constraint to sheet material all the time in Sheet Metal Forming, but complex structure, control difficulty, apparatus cost is high: this device needs on each pressure head, install a set of hydraulic valve by the special manufacture of stepper motor or driven by servomotor and hydraulic cylinder, revolution by controlling motor in forming process carrys out the displacement of hydraulic control cylinder, detect and real-time speed and Bit andits control owing to needing synchronously to carry out position to up to a hundred and even hundreds of pressure heads, cause control system almost cannot realize the function designed, even if manufacture successfully, the unstability of its high cost and system, also practical application is made almost cannot.
CN1864884A proposes a kind of upper mold section and adopts multipoint configuration and resisting medium to control to combine, female die adopts the building mortion of resisting medium, same employing does not adjust pressure head in advance, and rotated by Synchronization Control stepping motor in forming process and control the flowing of resisting medium and pressure realizes applying Normal Constraint to sheet material all the time in Sheet Metal Forming simultaneously, but complex structure, control difficulty, the shortcoming that apparatus cost is high still exists: this device also needs the stepper motor installing a set of relatively high power on each pressure head, distortion is produced to realize exercising plate under tumbler drive ram in forming process, this needs to carry out kinematic parameter (displacement to whole pressure heads equally, speed etc.) detect in real time, and each stepper motor needs to carry out real-time control in deformation process just can reach the final object be shaped, simultaneously, the pressure of multiple electricity liquid ratio relief valve to resisting medium is also needed to control.
CN102248053A proposes a kind of multi-point formation apparatus for sheet material with crease resistant functions, this device is staggered by shape adjusting unit and material folding unit and forms, and shape adjusting unit forms enveloping surface shape, the passive displacement of material folding unit, by back pressure effect clamping plate, replace blank body.This device can realize the Normal Constraint all the time sheet material being applied to Disjunct distribution in Sheet Metal Forming, but confining region only produces in the material folding unit zone of action, plate in the shape adjusting unit zone of action is still in suspension area, the defect such as wrinkling caused without Normal Constraint due to suspension area part still cannot be eliminated completely, its material folding unit belongs to passive displacement simultaneously, power in forming process and displacement are all uncontrollable, are difficult to reach design object.
CN102101363A proposes a kind of multi-point formation apparatus based on normal direction staff cultivation, this device can adjust profile surface arbitrarily and simple to operate, do not need to adjust in real time any element in forming process, all the time there is stable, uniform normal pressure to act on plate, can effectively suppress plate wrinkling.But this device needs to process special hydraulic cylinder, manufacturing cost is high, and will ensure that the installation of up to a hundred dense arrangement hydraulic cylinders is also very difficult with sealing, and the size of hydraulic cylinder limits the size of element body, element body density is restricted, and forming accuracy is not easy to ensure.Meanwhile, by the impact of hydraulic cylinder structure, the maximum force be applied on each element body is also limited, thus constrains the ability of the complicated slab curved surface that is shaped.
Summary of the invention
The object of this invention is to provide one can be treated as based plate and form effective Normal Constraint, essentially eliminate the suspension area in carved punched forming process, the sheet material flexible multipoint forming device that can effectively suppress plate wrinkling.
For solving the problems of the technologies described above, as one aspect of the present invention, provide a kind of sheet material flexible multipoint forming device, comprising: hydraulic container, hydraulic container has opening; Flexible membrane, is arranged on opening part, and the inner sealing of hydraulic container is formed hydraulic cavities by flexible membrane; Pressure regulating unit, with hydraulic chamber into communication; Multiple presser unit, relative flexibility diaphragm is arranged actively; Multiple presser unit is moved to the direction of flexible membrane, thus by the sheet material to be formed that is arranged between flexible membrane and presser unit along with flexible membrane is to the distortion deform in same pace in hydraulic cavities, until sheet material to be formed forms predetermined shape.
Further, presser unit comprises depression bar and flexible member; Sheet material flexible multipoint forming device also comprises support, support offers multiple installing hole, and each presser unit is arranged on an installing hole place correspondingly; Wherein, depression bar is located in installing hole actively, and flexible member is enclosed within the outside of depression bar, and one end of flexible member abuts with support, and the other end abuts with depression bar.
Further, presser unit also comprises pressure head, is connected pivotly with pressure head one end with the close flexible membrane of depression bar.
Further, pressure head is connected by the mode of magnetic absorption pivotly with one end of depression bar.
Further, presser unit also comprises the adjusting bolt of the one end away from flexible membrane being arranged on depression bar.
Further, sheet material flexible multipoint forming device also comprises pressure applying unit, and pressure applying unit is arranged on the side away from flexible membrane of depression bar, moves to flexible membrane to drive multiple presser unit.
Further, hydraulic container is provided with the draw-in groove for clamping sheet material to be formed.
Further, sheet material flexible multipoint forming device also comprises blank holder, and flexible membrane is tightly connected by blank holder and hydraulic container.
Because flexible membrane of the present invention can provide the real-time, tunable and uniform normal force matched, be treated as based plate and form effective Normal Constraint, essentially eliminate the suspension area in carved punched forming process, can effectively suppress plate wrinkling.Workpiece surface quality after shaping is good, thickness even, without defects such as impressions.The whole apparatus structure of the present invention is reasonable, operation uses simple, low cost of manufacture, reliable operation.
Accompanying drawing explanation
Fig. 1 diagrammatically illustrates the structural representation of of the present invention group;
Fig. 2 diagrammatically illustrates the schematic diagram of the present invention when stroke end;
Fig. 3 diagrammatically illustrates the syndeton schematic diagram of depression bar and pressure head.
Reference numeral in figure: 1, hydraulic container; 2, flexible membrane; 3, hydraulic cavities; 4, spacing bearing; 5, sheet material to be formed; 6, depression bar; 7, flexible member; 8, support; 9, pressure head; 10, adjusting bolt; 11, blank holder; 12, the body of rod; 13, joint; 14, the first magnet; 15, body; 16, hydraulic joint; 17, pressure applying unit; 18, pedestal; 19, the second magnet.
Detailed description of the invention
Below embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Please refer to Fig. 1 to Fig. 3, the invention provides a kind of sheet material flexible multipoint forming device, comprising: hydraulic container 1, hydraulic container 1 has opening; Flexible membrane 2, is arranged on opening part, and the inner sealing of hydraulic container 1 is formed hydraulic cavities 3 by flexible membrane 2; Pressure regulating unit, is communicated with hydraulic cavities 3; Multiple presser unit, relative flexibility diaphragm 2 is arranged actively; Multiple presser unit is moved to the direction of flexible membrane 2, thus by the sheet material to be formed 5 that is arranged between flexible membrane 2 and presser unit along with flexible membrane 2 is to the distortion deform in same pace in hydraulic cavities 3, until sheet material to be formed 5 forms predetermined shape.Such as, flexible membrane 2 can be made up of rubber.Especially, the length of presser unit can according to the Sheet Metal Surface profile design intending being shaped.
During use, first sheet material 5 to be formed is placed on the outside of flexible membrane 2, then presser unit is driven to move to the direction of flexible membrane 2, when one end of presser unit promotes flexible membrane 2 to the internal recess of hydraulic container 1, promote to be clamped in flexible membrane 2 simultaneously and with along with flexible membrane 2, identical distortion occurs with the sheet material to be formed 5 between presser unit.In this process, between multiple presser unit and sheet material to be formed 5, there is multiple contact point, simultaneously, due to the character of hydraulic pressure transfer, liquid in hydraulic container 1 then to provide an equal normal force by flexible membrane 2 to the whole surface of sheet material 5 to be formed, form the Normal Constraint being treated as based plate 5.
Because flexible membrane 2 of the present invention can provide the real-time, tunable and uniform normal force matched, be treated as based plate 5 and form effective Normal Constraint, essentially eliminate the suspension area in carved punched forming process, can effectively suppress plate wrinkling.Workpiece surface quality after shaping is good, thickness even, without defects such as impressions.The whole apparatus structure of the present invention is reasonable, operation uses simple, low cost of manufacture, reliable operation.
Preferably, the pressure of hydraulic cavities 3 can adjust in real time according to the material of sheet material 5 to be formed, thickness and target shape.Preferably, hydraulic cavities 3 is connected with outside hydraulic control system by hydraulic joint 16.
Preferably, presser unit comprises depression bar 6 and flexible member 7; Sheet material flexible multipoint forming device also comprises support 8, and support 8 offers multiple installing hole, and each presser unit is arranged on an installing hole place correspondingly; Wherein, depression bar 6 is located in installing hole actively, and flexible member 7 is enclosed within the outside of depression bar 6, and one end of flexible member 7 abuts with support 8, and the other end abuts with depression bar 6.When losing external motivating force and being applied to depression bar 6, under the effect of flexible member 7, depression bar 6 can automatically revert to initial state.
Preferably, presser unit also comprises pressure head 9, is connected pivotly with pressure head 9 one end with the close flexible membrane 2 of depression bar 6.Because the end of pressure head 9 with depression bar 6 is connected pivotly, thus, the distortion of the different angles of flexible membrane 2 can be adapted to, namely rotate along with the distortion of flexible membrane 2.
In forming process, pressure head 9 can rotate along with the distortion of sheet material 5 to be formed, remain the plane contact with sheet material 5 to be formed, add the contact area of pressure head 9 and sheet material 5 to be formed, avoid the generation of impression, meanwhile, under making the almost all surfaces of sheet material 5 to be formed all be in the Normal Constraint of pressure head.
Preferably, please refer to Fig. 3, pressure head 9 is connected by the mode of magnetic absorption pivotly with one end of depression bar 6.As shown in Figure 3, depression bar 6 comprises the body of rod 12, is arranged on the joint 13 of the body of rod 12 end and is arranged on the first magnet 14 on joint 13.Pressure head 9 comprises hemispheric body 15 and is arranged on second magnet 19 of sphere side of body 15.During installation, the ball head of body 15 is embedded in the depressed part of joint 13, thus make body 15 and joint 13 under the effect of the magnetic attraction of the first magnet 14 and the second magnet 19, mutually adsorb connection.
Preferably, presser unit also comprises the adjusting bolt 10 of the one end away from flexible membrane 2 being arranged on depression bar 6.Please refer to Fig. 1, in one embodiment, the length of all depression bars 6 is all identical, in order to form certain curved surface, is separately installed with an adjusting bolt 10 at the top of these depression bars 6.Like this, by the length regulating adjusting bolt 10 to stretch out depression bar 6, i.e. the length of adjustable whole presser unit, thus when pressurizeing, curved surface as shown in Figure 2 can be formed.Like this, the process of pressurization can be simplified.
Such as, in one embodiment, sheet material flexible multipoint forming device also comprises pressure applying unit 17, and such as, forcing press etc., pressure applying unit 17 is arranged on the side away from flexible membrane 2 of depression bar 6, moves to flexible membrane 2 to drive multiple presser unit.Visible, the pressing mechanism only needing pressure applying unit 17 to have a plate-like structure can form the curved surface in Fig. 2.After shaping completes, pressure applying unit 17 drives pressing mechanism backhaul, subsequently hydraulic container 1 feed liquor, and flexible membrane 2 rises, and takes out the plate suppressed.
Preferably, hydraulic container 1 is provided with the draw-in groove for clamping sheet material 5 to be formed.
Preferably, sheet material flexible multipoint forming device also comprises blank holder 11, and flexible membrane 2 is tightly connected by blank holder 11 and hydraulic container 1.
Preferably, support 8 comprises pedestal 18, and hydraulic container 1 is formed on pedestal 18, and is provided with oil duct in pedestal 18, and this hydraulic container 1 is connected with pressure regulating unit by this oil duct.
Preferably, sheet material flexible multipoint forming device also comprises the spacing bearing 4 be arranged on described support 8, and it is for limiting the stroke of presser unit.
The present invention adopts flexible membrane 2 to be treated as based plate 5 and realizes supporting and Normal Constraint, and profile surface can form arbitrarily and adjustment mode is easy, and the density of presser unit is unrestricted, and forming accuracy is high and sealing is reliable.Also no longer need to adjust in real time any element in forming process, for the plate of different materials, thickness and target shape, flexible membrane 2 can provide the real-time, tunable and uniform normal force that match, effective Normal Constraint is formed to plate, essentially eliminate the suspension area in carved punched forming process, can effectively suppress plate wrinkling, effectively suppress wrinkling and resilience.Workpiece surface quality after shaping is good, and thickness is even, without defects such as impressions.Apparatus structure is reasonable, and operation uses simple, low cost of manufacture, reliable operation.
In addition, the present invention does not need flange fixing installation, saves the trimming operation after shaping, improves the utilization rate of plate, and good product quality, thickness are even, and surface quality can well be ensured.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a sheet material flexible multipoint forming device, is characterized in that, comprising:
Hydraulic container (1), described hydraulic container (1) has opening;
Flexible membrane (2), is arranged on described opening part, and the inner sealing of described hydraulic container (1) is formed hydraulic cavities (3) by described flexible membrane (2);
Pressure regulating unit, is communicated with described hydraulic cavities (3);
Multiple presser unit, relatively described flexible membrane (2) is arranged actively;
Described multiple presser unit is moved to the direction of described flexible membrane (2), thus the sheet material to be formed (5) that will be arranged between described flexible membrane (2) and described presser unit is along with described flexible membrane (2) is to the distortion deform in same pace in described hydraulic cavities (3), until described sheet material to be formed (5) forms predetermined shape;
During use, first sheet material to be formed (5) is placed on the outside of flexible membrane (2), then presser unit is driven to move to the direction of flexible membrane (2), when one end of presser unit promotes flexible membrane (2) to the internal recess of hydraulic container (1), promote to be clamped in flexible membrane (2) simultaneously and with along with flexible membrane (2), identical distortion occurs with the sheet material to be formed (5) between presser unit, in this process, between multiple presser unit and sheet material to be formed (5), there is multiple contact point, simultaneously, due to the character of hydraulic pressure transfer, liquid in hydraulic container (1) then provides a uniform normal force by flexible membrane (2) to the whole surface of sheet material to be formed (5), formation is treated as the Normal Constraint of based plate (5).
2. sheet material flexible multipoint forming device according to claim 1, is characterized in that, described presser unit comprises depression bar (6) and flexible member (7);
Described sheet material flexible multipoint forming device also comprises support (8), and (8) offer multiple installing hole to described support, and each described presser unit is arranged on described installing hole place correspondingly;
Wherein, described depression bar (6) is located in described installing hole actively, described flexible member (7) is enclosed within the outside of described depression bar (6), and one end of described flexible member (7) abuts with described support (8), the other end abuts with described depression bar (6).
3. sheet material flexible multipoint forming device according to claim 2, it is characterized in that, described presser unit also comprises pressure head (9), and described pressure head (9) is connected pivotly with one end of the close described flexible membrane (2) of described depression bar (6).
4. sheet material flexible multipoint forming device according to claim 3, is characterized in that, described pressure head (9) is connected by the mode of magnetic absorption pivotly with described one end of described depression bar (6).
5. sheet material flexible multipoint forming device according to claim 2, is characterized in that, described presser unit also comprises the adjusting bolt (10) of the one end away from described flexible membrane (2) being arranged on described depression bar (6).
6. sheet material flexible multipoint forming device according to claim 2, it is characterized in that, described sheet material flexible multipoint forming device also comprises pressure applying unit (17), described pressure applying unit (17) is arranged on the side away from described flexible membrane (2) of described depression bar (6), moves to described flexible membrane (2) to drive described multiple presser unit.
7. sheet material flexible multipoint forming device according to claim 1, is characterized in that, described hydraulic container (1) is provided with the draw-in groove for clamping described sheet material to be formed (5).
8. sheet material flexible multipoint forming device according to claim 1, it is characterized in that, described sheet material flexible multipoint forming device also comprises blank holder (11), and described flexible membrane (2) is tightly connected by described blank holder (11) and described hydraulic container (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410065771.9A CN103878228B (en) | 2014-02-26 | 2014-02-26 | Sheet material flexible multipoint forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410065771.9A CN103878228B (en) | 2014-02-26 | 2014-02-26 | Sheet material flexible multipoint forming device |
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| CN103878228A CN103878228A (en) | 2014-06-25 |
| CN103878228B true CN103878228B (en) | 2016-04-27 |
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| CN201410065771.9A Expired - Fee Related CN103878228B (en) | 2014-02-26 | 2014-02-26 | Sheet material flexible multipoint forming device |
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| CN (1) | CN103878228B (en) |
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| JP6069385B2 (en) * | 2015-02-27 | 2017-02-01 | アイダエンジニアリング株式会社 | Plate metal material bending apparatus and method |
| CN105478539B (en) * | 2015-12-29 | 2017-09-15 | 哈尔滨工业大学（威海） | Sheet material multiple spot progressive molding device |
| CN106826162A (en) * | 2017-01-24 | 2017-06-13 | 哈尔滨理工大学 | A kind of dot matrix Universal mold preparation method |
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| CN107952872B (en) * | 2017-12-08 | 2023-07-04 | 山东大学 | Hydraulic auxiliary incremental forming device and method based on adjustable flexible multi-support |
| CN108043964B (en) * | 2017-12-11 | 2019-09-20 | 吉林大学 | Using the thin plate of low-melting alloy without the wrinkle resistant shaping dies of surplus and manufacturing process |
| CN107984868A (en) * | 2017-12-26 | 2018-05-04 | 珠海格力电器股份有限公司 | A kind of pressure apparatus and compression method |
| CN109175051B (en) * | 2018-08-21 | 2020-05-12 | 吉林大学 | Method for forming three-dimensional curved surface by mould-free multi-point spinning |
| CN110405053A (en) * | 2019-08-05 | 2019-11-05 | 南京工程学院 | A kind of progressive molding auxiliary device for heat treating and its hot-working method |
| CN111266450A (en) * | 2020-02-17 | 2020-06-12 | 王成科 | Non-mould multi-point forming mould for forming computer mainboard |
| CN111545620B (en) * | 2020-05-13 | 2022-01-25 | 辽宁斯麦尔科技有限公司 | Stamping forming process for sheet metal part |
| CN111545619B (en) * | 2020-05-13 | 2021-12-31 | 长沙科美机械制造有限公司 | Stamping forming equipment for sheet metal parts |
| CN112453163B (en) * | 2020-09-22 | 2022-03-15 | 成都飞机工业（集团）有限责任公司 | Universal upper pressing structure for pull die and using method thereof |
| CN113926941A (en) * | 2021-10-09 | 2022-01-14 | 南京筑新科技有限公司 | Flexible multi-point forming device and method for plate |
| CN116944328B (en) * | 2023-09-18 | 2023-12-05 | 中南大学 | Magnetic fluid flexible stamping forming device and method for complex curved surface metal component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FI20090194A (en) * | 2009-05-15 | 2010-11-16 | Silexcomp Oy | Hydraulic press system and equipment |
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