CN102728695A - Multipoint moldless hydraulic bulge forming process and multipoint moldless hydraulic bulge forming device - Google Patents
Multipoint moldless hydraulic bulge forming process and multipoint moldless hydraulic bulge forming device Download PDFInfo
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- CN102728695A CN102728695A CN2012102429239A CN201210242923A CN102728695A CN 102728695 A CN102728695 A CN 102728695A CN 2012102429239 A CN2012102429239 A CN 2012102429239A CN 201210242923 A CN201210242923 A CN 201210242923A CN 102728695 A CN102728695 A CN 102728695A
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Abstract
The invention discloses a multipoint moldless hydraulic bulge forming process and a multipoint moldless hydraulic bulge forming device. With the advantages of high production efficiency, high precision in machining piece and suitableness in mass production, a mold forming method has been in the dominant position over the years. However, the disadvantages are that the mould is long in design and manufacturing periods and high in maintenance expense; a plurality of molds are generally required for forming one component, thereby resulting in a long new product development period, a high cost and a lack of flexibility; and if the product is made a little bit change, the mold needs to be redesigned and changed. The process comprises the steps of a working piece mold making procedure, a multi-point mold shape-adjusting procedure, a liquid charging and stretching procedure, a pressure maintaining and molding procedure, an aerating and draining procedure, a molded workpiece measuring procedure, a numerical control cutting procedure, an finished product inspection procedure, and a finished product packaging and protecting procedure. The multipoint moldless hydraulic bulge forming process and the multipoint moldless hydraulic bulge forming device are used for multipoint hydraulic pressure bulge forming.
Description
Technical field:
the present invention relates to the metal forming technical field, are specifically related to that a kind of multiple spot does not have the mould hydraulic bulging process and multiple spot does not have mould hydraulic expanding-forming equipment.
Background technology:
along with the development of society, complicated hyperbolic sheet metal obtains increasing utilization in many industries such as aircraft, boats and ships, express locomotive, automobile and even building.The hyperboloid that people not only require to be shaped is different, requires again that its forming accuracy is high, production efficiency is high, surface quality good, material thickness is even.This has just proposed great challenge to metal sheet forming technology.
in traditional plate manufacturing process, the hand finishing method has occupied not leading position because production efficiency is low, machining accuracy is low, be not suitable for production in enormous quantities in sheet forming.Die forming method production efficiency is high, the precision of workpiece is high, be fit to production in enormous quantities, for many years always in occupation of leading position.But shortcoming is a mould, and to manufacture and design the cycle long, and maintenance cost is high, and the part that often is shaped needs a plurality of moulds, causes new product development cycle long, and cost is high, and lack flexiblely, and product makes to change the back mould slightly needs design replacing again.
therefore, the sheet forming technology of some new shapes is arisen at the historic moment, like contour peening, laser forming, water jet mouldless shaping technology, digitlization progressive molding, non-mould multi-point forming etc.Yet the sheet forming technology of these several kinds of new shapes also exists some shortcomings and limitation, and the limitation of contour peening is a spherical deformation trend, distortion is limited, restrictive condition is harsh, influence factor is various etc.; The shortcoming of laser forming is that cost is high, is not easy control; Water jet mouldless shaping technology also needs constantly perfect, also has a lot of problems in the practical application; The digitlization progressive molding need be made mould, and processing cost is high, the cycle is long, shortcomings such as surface quality difference; Compare with former kinds of forming techniques, the non-mould multi-point forming technology has lot of advantages: realize mouldless shaping, optimize deformation path, skinny device is shaped big shape part, easily be automated.
multiple spot mouldless shaping technology is divided into according to forming mode: multiple spot is to being pressed into shape technology and multiple spot stretch forming technology.Multiple spot changes than greatly the time when running into local curvature being pressed into shape technology, occur gauffer easily, and springback capacity is bigger.Multiple spot stretch forming technology is compared multiple spot to being pressed into the shape technology, and its springback capacity is little, formed precision is high, wrinkle resistant pleat.Multiple spot does not now have die drawing, and to stretch forming technique all be to adopt the mechanical stretching form, for example clamps plate with clamp and carry out mechanical stretching.And also there are following three kinds of major defects in the mechanical stretching forming mode: (1) forms the stress concentration phenomenon in slab interior easily; The metal material low as far as a lot of intensity, that percentage elongation is little and some are the bigger curved surface of curvature comparatively; In drawing process, be easy to generate and tear; (2) unusual waste material, in resource today of shortage like this, this waste seems and particularly should not; (3) no matter be that multiple spot is technological to being pressed into shape technology or multiple spot stretch forming, its forming accuracy is not high, can only reach the millimeter level.
Summary of the invention:
the purpose of this invention is to provide that a kind of multiple spot does not have the mould hydraulic bulging process and multiple spot does not have mould hydraulic expanding-forming equipment; Multiple spot is not had die drawing to be stretched the hydraulic expanding-forming technology of forming technique and sheet material and combines; Through improving; Form multiple spot and do not had the mould hydraulic bulging process; With the hydraulic expanding-forming of sheet material technology uniform force application, distortion is smooth, forming limit is high, forming quality good, forming accuracy is high, the characteristics of mold damage not, the characteristics that need not make mould with multiple spot mouldless shaping technology, realize automation easily are combined togather.
Above-mentioned purpose realizes through following technical scheme:
a kind of multiple spot does not have the mould hydraulic bulging process, and described technology comprises the steps: part model production process, multiple spot mould accent shape operation, topping up stretching process, pressurize setting operation, inflation discharge opeing operation, Forming Workpiece measurement operation, Numerical control cutting operation, product inspection operation, finished product packing and protection operation.
described multiple spot does not have the mould hydraulic bulging process, described part model production process, and the part model that requirement will be shaped is the smooth surface that 2 rank can be led through making molding curve, extends on the hydraulic pressure datum plane.
described multiple spot mould is transferred the shape operation; Transfer the shape system directly from the Forming Workpiece model file, to read the control point coordinate through the multiple spot mould; Transfer the shape system for the multiple spot mould through described ranging rod feedback range information, carry out closed-loop control, transfer the shape precision to reach 0.02mm.
described topping up stretching process after forcing press compresses, reached the scheduled pressure value pressurize 1-10 minute; Open the feed tube switch, hydraulic test injects liquid in hydraulic cavities, when fluid pressure reaches scheduled pressure value; Pressurization finishes, and the hydraulic test pressure set points is relevant with the sheet metal material with shaping form, to the aluminum alloy plate materials of 1 ~ 10mm; This setting value is at 0.5Mpa to 40Mpa, and for the steel plate of 1mm ~ 12mm, this setting value is at 1Mpa to 100Mpa; The forcing press scheduled pressure value multiply by 1.2 ~ 2.0 times of sheet metal compression area gained force value for the hydraulic test pressure set points.
described multiple spot does not have the mould hydraulic bulging process, described pressurize setting operation, and topping up kept this pressure 1-10 minute through hydraulic test after stretching and finishing, and the dwell time is confirmed according to the shape and the workpiece material of Forming Workpiece curved surface.
described inflation discharge opeing operation, pressurize is closed the feed tube switch after finishing, and opens drain pipe switch and air inlet pipe switch, and to the hydraulic pressure interacvity air-filling, liquid is back to hydraulic test by drain pipe by air pump.
shaping workpiece is measured operation, takes out Forming Workpiece, is placed on the three-dimensional measurement platform, carries out 3-D scanning, and scanning document and part model are contrasted, and the controlling dimension precision is 0.05mm.
described multiple spot does not have the mould hydraulic bulging process, and described Numerical control cutting operation with Forming Workpiece, by taking out on the three-dimensional measurement platform, is placed on the numerical control cutting machine, cuts according to part model, and cutting accuracy is 0.05mm.
described product inspection operation, the workpiece that cutting is accomplished is placed on and carries out finished size check and appearance test on the three-dimensional measurement platform.
described finished product packing and protection operation are placed on the workpiece of well cutting on the curved surface carriage, and surperficial pad pasting wraps up workpiece with bubble chamber film again.
a kind of numerical control multiple spot does not have mould hydraulic expanding-forming equipment; Its composition comprises: the multiple spot mould, and described multiple spot mould transfers the shape system to be connected with the multiple spot mould, and described multiple spot mould and described multiple spot mould transfer the shape system to be installed in the housing; Described housing is connected with forcing press; Described multiple spot mould connects Universal-head, and described sheet metal is between last blank holder and following blank holder, and described flexible backing plate is between described Universal-head and described sheet metal; Air pump is connected with described hydraulic cavities through air inlet pipe, and described hydraulic test is connected with described hydraulic cavities with described drain pipe through described feed tube.
described multiple spot does not have mould hydraulic expanding-forming equipment; Described flexible backing plate adopts polyurethane sheet composition metal intermediate plate; Described flexible backing plate can be in polyurethane sheet the composition metal intermediate plate, the thickness of described flexible backing plate is confirmed according to Forming Workpiece profile characteristics and Forming Workpiece metal material.
described multiple spot does not have mould hydraulic expanding-forming equipment; Described multiple spot mould transfers the shape system to comprise: computer control system; Described computer control system is connected with electromagnetic clutch with electric rotating machine respectively, and described motor is installed on the electric machine support, and band or chain are installed on described electric rotating machine and the described electromagnetic clutch synchronously; Synchronous band rotary body is installed on described motor synchronous band or the chain, and described electromagnetic clutch is connected with element body.
described multiple spot does not have the mould hydraulic bulging process; Described multiple spot mould accent type equipment; Adopt described electric rotating machine through described synchronous band or chain, drive described element body and rotate accent shape, through electromagnetic clutch; Control element body and the clutch of band or chain rotary body synchronously, described synchronous band or chain a plurality of described element bodies of connecting; Described electric rotating machine, described electromagnetic clutch all link to each other with computer control system; Described computer control system is transferred form height degree information according to the element body of described ranging rod feedback; Control described electric rotating machine rotation; Described electromagnetic clutch clutch transfers the shape precision to reach 0.02mm.
described multiple spot does not have mould hydraulic expanding-forming equipment, and described multiple spot does not have the mould hydraulic bulging process, and described element body is the screw lift structure, through the rotation of screw mandrel, realizes feed screw nut's up-down.
described multiple spot does not have mould hydraulic expanding-forming equipment, and described multiple spot does not have the mould hydraulic bulging process, and it is terminal that described Universal-head is installed in described element body; With the Universal-head top center point is that the centre of sphere rotates; The maximum space corner is 39 °, and in the rotation process, the vertical coordinate of top center point does not change; Described Universal-head is detachable, changes according to shaping curved surface form.
Beneficial effect:
Mouldless shaping is 1. realized in
.Control through to each element body motion constructs various shaping curved surface; Can replace that traditional unitary mould saves that mould manufactures and designs, required human and material resources and financial resources such as debugging and preservation; Shorten life cycle of the product significantly; Reduce production costs, improve competitiveness of product.Compare with the die forming method, not only save the expense of processing and manufacturing mould, and save a large amount of repairing a die and the mode transfer time; Compare with the hand finishing method, the product precision of shaping is high, quality is good, and has significantly improved production efficiency.
Automation is 2. realized in
.Area of computer aided is adopted in curved surface appearance, realizes the integrated production of CAD/CAM/CAE, high efficiency, and labour intensity is little, has greatly improved labourer's operating environment.
3. forming limit are high.Because the effect of hydraulic pressure is tightly fitted blank and die in the hydraulic expanding-forming, produce " friction keeps effect ", improved the bearing capacity of force transmission region.What is more important; For the complex curved surface parts of automobile manufacturing field, the effect of reverse hydraulic pressure forms " soft drawn is stretched muscle deeply ", eliminates suspension area; Setting up useful friction between blank and the mould makes the radially tension of fillet place, die bottom blank reduce; Strain track is skew left on the moulding limiting figure, can significantly improve forming limit, and the two tensile stress states of the grade that traditional pull and stretch is stretched then cause drawing crack easily.
4. forming accuracy are high.The multiple spot mould transfers shape to adopt closed-loop control, will transfer the shape precision to be controlled at micron order.The terminal Universal-head of multiple spot mould element body is that the centre of sphere rotates with the summit, has eliminated the camber line error of common round end element body.Use the shaped by fluid pressure bulging significantly to improve the Forming Quality and the performance of workpiece, the applying degree of workpiece and mould is good, and springback capacity is minimum.
5. pair complex spatial curve surface adaptive are strong.The terminal Universal-head rotational angle of multiple spot mould element body can reach 39 °, can seamlessly transit along with whole curved surface.The Universal-head of multiple spot mould element body end is replaceable, is replaced with the Universal-head of special surface shape, has increased the multiple spot mould greatly to complex-curved adaptability.
6. sheet metal thickness attenuate amount is even, and residual stress is little.Hydroforming makes workpiece in the process that is shaped, and stressed evenly each point of workpiece gets into plastic deformation uniformly, be out of shape well-balancedly, so the workpiece after the shaping all gets into the plastic deformation stage, thickness is even, does not almost have residual stress.
7. transfer shape speed fast.Because an electric rotating machine a plurality of element bodies of can connecting transfer the shape time significantly to be reduced, and can in 3 minutes, transfer complete model, greatly improved the operating efficiency that multiple spot does not have the mould hydraulic bulging process.
Description of drawings:
accompanying drawing 1 is the structural representation of this product.
accompanying drawing 2 is structural representations that the multiple spot mould is transferred the shape system in the accompanying drawing 1.
accompanying drawing 3 is left views of accompanying drawing 2.
accompanying drawing 4 is the sketch mapes that are connected of element body and Universal-head in the accompanying drawing 2.
The specific embodiment:
Embodiment 1:
a kind of multiple spot does not have the mould hydraulic bulging process, and described technology comprises the steps: part model production process, multiple spot mould accent shape operation, topping up stretching process, pressurize setting operation, inflation discharge opeing operation, Forming Workpiece measurement operation, Numerical control cutting operation, product inspection operation, finished product packing and protection operation.
Embodiment 2:
There is not the mould hydraulic bulging process according to embodiment 1 described multiple spot, described part model production process, the part model that requirement will be shaped is the smooth surface that 2 rank can be led through making molding curve, extends on the hydraulic pressure datum plane;
described multiple spot mould accent type operation; Transfer shape system 2 directly from the Forming Workpiece model file, to read the control point coordinate through the multiple spot mould; Transfer the shape system for described multiple spot mould through described ranging rod 16 feedback range informations; Carry out closed-loop control, transfer the shape precision to reach 0.02mm.
Embodiment 3:
above-mentioned multiple spot does not have the mould hydraulic bulging process; Described topping up stretching process after forcing press 3 compresses, reached the scheduled pressure value pressurize 1-10 minute; Open the switch of feed tube 4; Hydraulic test 5 injects liquid in hydraulic cavities 20, when fluid pressure reached certain value, pressurization finished; The hydraulic test pressure set points is relevant with the sheet metal material with shaping form, and to the aluminum alloy plate materials of 1 ~ 10mm, this setting value is at 0.5Mpa to 40Mpa, and for the steel plate of 1mm ~ 12mm, this setting value is at 1Mpa to 100Mpa; The forcing press scheduled pressure value multiply by 1.2 ~ 2.0 times of sheet metal compression area gained force value for the hydraulic test pressure set points.
Embodiment 4:
Described multiple spot does not have the mould hydraulic bulging process, described pressurize setting operation, and topping up keeps this pressure certain hour through described hydraulic test after stretching and finishing, and the dwell time is confirmed according to the shape and the workpiece material of Forming Workpiece curved surface;
Described inflation discharge opeing operation after pressurize finishes, is closed the switch of described feed tube, opens the switch and air inlet pipe 14 switches of drain pipe 6, and to described hydraulic pressure interacvity air-filling, liquid is back to described hydraulic test by drain pipe by air pump 7;
Forming Workpiece is measured operation, takes out Forming Workpiece, is placed on the three-dimensional measurement platform, carries out 3-D scanning, and scanning document and part model are contrasted, and the controlling dimension precision is 0.05mm; Also can require to carry out precision control according to component shaping;
Described Numerical control cutting operation with Forming Workpiece, by taking out on the three-dimensional measurement platform, is placed on the numerical control cutting machine, cuts according to part model, and cutting accuracy is 0.05mm, also can require to carry out precision control according to component shaping;
Described product inspection operation, the workpiece that cutting is accomplished is placed on and carries out finished size check and appearance test on the three-dimensional measurement platform;
described finished product packing and protection operation are placed on the workpiece of well cutting on the curved surface carriage, and surperficial pad pasting wraps up workpiece with bubble chamber film again.
Embodiment 5:
a kind of multiple spot does not have mould hydraulic expanding-forming equipment; Its composition comprises: multiple spot mould 21; Described multiple spot mould transfers the shape system to be connected with described multiple spot mould; Described multiple spot mould and described multiple spot mould transfer the shape system to be installed in the housing 22, and described housing is connected with described forcing press, and described multiple spot mould connects Universal-head 18; Described sheet metal is between last blank holder 25 and following blank holder 26; Described flexible backing plate 23 is between described Universal-head 18 and described sheet metal 24, and described air pump is connected with described hydraulic cavities through described air inlet pipe, and described hydraulic test is connected with described hydraulic cavities with described drain pipe through described feed tube.
Embodiment 6:
above-mentioned multiple spot does not have mould hydraulic expanding-forming equipment; Described flexible backing plate adopts polyurethane sheet composition metal intermediate plate; Described flexible backing plate can be in polyurethane sheet the composition metal intermediate plate, the thickness of described flexible backing plate is confirmed according to Forming Workpiece profile characteristics and Forming Workpiece metal material.
Embodiment 7:
above-mentioned multiple spot does not have mould hydraulic expanding-forming equipment; Described multiple spot mould transfers the shape system to comprise: computer control system 8; Described computer control system is connected with electromagnetic clutch 10 with electric rotating machine 9 respectively; Described electric rotating machine is installed on the electric machine support 11; Band or chain 12 are installed on described electric rotating machine and the described electromagnetic clutch synchronously, and synchronous band or chain rotary body 13 are installed on described motor synchronous band or the chain, and described electromagnetic clutch is connected with element body 15.
Embodiment 8:
above-mentioned multiple spot does not have mould hydraulic expanding-forming equipment, and described multiple spot mould is transferred the shape system, adopts described electric rotating machine through described synchronous band or chain, drives described element body and rotates accent shape.Through electromagnetic clutch, control element body and the clutch of band rotary body synchronously.Described synchronous band or chain a plurality of described element bodies of can connecting.Described electric rotating machine, described electromagnetic clutch all link to each other with computer control system.Described computer control system is transferred form height degree information according to the element body of described ranging rod feedback, controls described electric rotating machine rotation, and described electromagnetic clutch clutch transfers the shape precision to reach 0.02mm.
Embodiment 9:
above-mentioned multiple spot does not have mould hydraulic expanding-forming equipment, described multi-dot hydraulic pressure stretch forming technology, and described element body is the screw lift structure, through the rotation of screw mandrel, realizes feed screw nut's up-down.
Embodiment 10:
above-mentioned multiple spot does not have mould hydraulic expanding-forming equipment; Described datum plane is connected with element body 15; Described element body is connected with bulb bearing 17; Described bulb bearing is connected with Universal-head 18, between described element body and the said Universal-head extension spring 19 is installed, and ranging rod 16 is installed on the described element body.It is terminal that described Universal-head is installed in described element body, is that the centre of sphere rotates with the Universal-head top center point, and the maximum space corner is 39 °, and in the rotation process, the vertical coordinate of top center point does not change.Described Universal-head is detachable, changes according to shaping curved surface form.
Claims (10)
1. a multiple spot does not have the mould hydraulic bulging process, it is characterized in that: described technology comprises the steps: part model production process, multiple spot mould accent shape operation, topping up stretching process, pressurize setting operation, inflation discharge opeing operation, Forming Workpiece measurement operation, Numerical control cutting operation, product inspection operation, finished product packing and protection operation.
2. multiple spot according to claim 1 does not have the mould hydraulic bulging process; It is characterized in that: described part model production process; The part model that requirement will be shaped, but be the smooth surface that 2 rank lead shapes are made through molding curve, extend on the hydraulic pressure datum plane;
Described multiple spot mould is transferred the shape operation; Transfer the shape system directly from the Forming Workpiece model file, to read the control point coordinate through the multiple spot mould; Transfer the shape system for the multiple spot mould through described ranging rod feedback range information, carry out closed-loop control, transfer the shape precision to reach 0.02mm.
3. multiple spot according to claim 1 and 2 does not have the mould hydraulic bulging process, it is characterized in that: described topping up stretching process, after forcing press compresses; Reached the scheduled pressure value pressurize 1-10 minute, and opened the feed tube switch, hydraulic test injects liquid in hydraulic cavities; When fluid pressure reached scheduled pressure value, pressurization finished, and the hydraulic test pressure set points is relevant with the sheet metal material with shaping form; Aluminum alloy plate materials to 1 ~ 10mm; This setting value is at 0.5Mpa to 40Mpa, and for the steel plate of 1mm ~ 12mm, this setting value is at 1Mpa to 100Mpa; The forcing press scheduled pressure value multiply by 1.2 ~ 2.0 times of sheet metal compression area gained force value for the hydraulic test pressure set points.
4. there is not the mould hydraulic bulging process according to claim 1 or 2 or 3 described multiple spots; It is characterized in that: described pressurize setting operation; Topping up kept this pressure 1-10 minute through hydraulic test after stretching and finishing, and the dwell time is confirmed according to the shape and the workpiece material of Forming Workpiece curved surface;
Described inflation discharge opeing operation, pressurize is closed the feed tube switch after finishing, and opens drain pipe switch and air inlet pipe switch, and to the hydraulic pressure interacvity air-filling, liquid is back to hydraulic test by drain pipe by air pump;
Shaping workpiece is measured operation, takes out Forming Workpiece, is placed on the three-dimensional measurement platform, carries out 3-D scanning, and scanning document and part model are contrasted, and the controlling dimension precision is 0.05mm;
Described Numerical control cutting operation with Forming Workpiece, by taking out on the three-dimensional measurement platform, is placed on the numerical control cutting machine, cuts according to part model, and cutting accuracy is 0.05mm;
Described product inspection operation, the workpiece that cutting is accomplished is placed on and carries out finished size check and appearance test on the three-dimensional measurement platform;
Described finished product packing and protection operation are placed on the workpiece of well cutting on the curved surface carriage, and surperficial pad pasting wraps up workpiece with bubble chamber film again.
5. a numerical control multiple spot does not have mould hydraulic expanding-forming equipment; Its composition comprises: the multiple spot mould is characterized in that: described multiple spot mould transfers the shape system to be connected with the multiple spot mould, and described multiple spot mould and described multiple spot mould transfer the shape system to be installed in the housing; Described housing is connected with forcing press; Described multiple spot mould connects Universal-head, and described sheet metal is between last blank holder and following blank holder, and described flexible backing plate is between described Universal-head and described sheet metal; Air pump is connected with described hydraulic cavities through air inlet pipe, and described hydraulic test is connected with described hydraulic cavities with described drain pipe through described feed tube.
6. multiple spot according to claim 5 does not have mould hydraulic expanding-forming equipment; It is characterized in that: described flexible backing plate adopts polyurethane sheet composition metal intermediate plate; Described flexible backing plate can be in polyurethane sheet the composition metal intermediate plate, the thickness of described flexible backing plate is confirmed according to Forming Workpiece profile characteristics and Forming Workpiece metal material.
7. there is not mould hydraulic expanding-forming equipment according to claim 5 or 6 described multiple spots; It is characterized in that: described multiple spot mould transfers the shape system to comprise: computer control system; Described computer control system is connected with electromagnetic clutch with electric rotating machine respectively; Described motor is installed on the electric machine support; Band or chain are installed on described electric rotating machine and the described electromagnetic clutch synchronously, and synchronous band rotary body is installed on described motor synchronous band or the chain, and described electromagnetic clutch is connected with element body.
8. there is not mould hydraulic expanding-forming equipment according to claim 5 or 6 described multiple spots; It is characterized in that: described multiple spot mould accent type equipment; Adopt described electric rotating machine through described synchronous band or chain, drive element body and rotate accent shape, through electromagnetic clutch; Control described element body and the clutch of band or chain rotary body synchronously, described synchronous band or chain a plurality of described element bodies of connecting; Described electric rotating machine, described electromagnetic clutch all link to each other with computer control system; Described computer control system is transferred form height degree information according to the element body of described ranging rod feedback; Control described electric rotating machine rotation; Described electromagnetic clutch clutch transfers the shape precision to reach 0.02mm.
9. multiple spot according to claim 7 does not have mould hydraulic expanding-forming equipment, it is characterized in that: described multiple spot does not have the mould hydraulic bulging process, and described element body is the screw lift structure, through the rotation of screw mandrel, realizes feed screw nut's up-down.
10. do not have mould hydraulic expanding-forming equipment according to claim 5 or 6 or 8 or 9 described multiple spots, it is characterized in that: described multiple spot does not have the mould hydraulic bulging process, and it is terminal that described Universal-head is installed in described element body; With the Universal-head top center point is that the centre of sphere rotates; The maximum space corner is 39 °, and in the rotation process, the vertical coordinate of top center point does not change; Described Universal-head is detachable, changes according to shaping curved surface form.
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| CN102728696A (en) * | 2012-07-15 | 2012-10-17 | 哈尔滨工业大学空间钢结构幕墙有限公司 | Numerical-control multi-point mold-free hydraulic bulging technology and device |
| CN102909251A (en) * | 2012-10-29 | 2013-02-06 | 安徽江淮汽车股份有限公司 | Hydraulic drawing forming process for sheet materials |
| CN104384356A (en) * | 2014-11-28 | 2015-03-04 | 黑龙江中科诺晟自动化设备开发有限公司 | Serial control device for clutches corresponding to driving lead screws in dot-matrix type mold automatic molding equipment |
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| CN107486488A (en) * | 2017-09-28 | 2017-12-19 | 天津职业技术师范大学 | Metal plate material hydraulic shaping method and its die device |
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| CN104384356A (en) * | 2014-11-28 | 2015-03-04 | 黑龙江中科诺晟自动化设备开发有限公司 | Serial control device for clutches corresponding to driving lead screws in dot-matrix type mold automatic molding equipment |
| CN106345860A (en) * | 2016-08-25 | 2017-01-25 | 江南造船(集团)有限责任公司 | Adjustable flexible processing device and curved plate forming method for ship curved plate processing |
| CN107486488A (en) * | 2017-09-28 | 2017-12-19 | 天津职业技术师范大学 | Metal plate material hydraulic shaping method and its die device |
| 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 |
| CN116550848A (en) * | 2023-07-11 | 2023-08-08 | 成都飞机工业（集团）有限责任公司 | Multi-point electromagnetic forming equipment and method for sheet metal workpiece |
| CN116550848B (en) * | 2023-07-11 | 2023-11-10 | 成都飞机工业（集团）有限责任公司 | Multi-point electromagnetic forming equipment and method for sheet metal workpiece |
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Application publication date: 20121017 |