CN108543854A - A kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism and device - Google Patents
A kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism and device Download PDFInfo
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- CN108543854A CN108543854A CN201810457158.XA CN201810457158A CN108543854A CN 108543854 A CN108543854 A CN 108543854A CN 201810457158 A CN201810457158 A CN 201810457158A CN 108543854 A CN108543854 A CN 108543854A
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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
- B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces
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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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/005—Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism and devices, belong to part forming manufacture correlative technology field, and method includes the following steps：According to target formation of parts size design flanging component；It establishes finite element model and carries out simulation forming analysis；Building mortion is provided, sets discharge parameter and discharge path according to analog result, the progressive no mould monolithic molding of electromagnetism is carried out, obtains preform part；Preform parts fixation is subjected to shaping on no core model spinning machine, obtains the final shape for meeting processing request.The present invention realize large-scale housing part without mould monolithic molding, effectively prevent the scraggly defect of piece surface, significantly improve the forming accuracy and surface quality of formation of parts, in addition, the above method is versatile, it need to only prepare a set of flanging component when processing different product, substantially reduce the production cycle, significantly reduce the production cost of large-scale sheet metal component.
Description
Technical field
The invention belongs to part formings to manufacture correlative technology field, more particularly, to a kind of progressive nothing of sheet metal component electromagnetism
Mould entirety combined shaping method and device.
Background technology
With the continuous improvement of overall national strength, China achieves quantum jump in aerospace field.Space rocket conduct
The carrier of exploration of the universe also achieves huge achievement.But the forming of the store-vessel bottom of space transporter is one always
Problem.Currently, store-vessel bottom mostly uses melon valve and head cover ellipsoid composite structure, connected by welding procedure, this method shapes
Part will produce larger welding residual stress, mechanical property is difficult to control.And it is then needed greatly with the direct spinning of spinning machine
The spinning machine of type, cost is very high, and forming efficiency is low, and the degree of automation is low, and labor intensity is big, and is difficult at room temperature pair
The problems such as material of forming property difference is formed, and warm working can bring energy consumption aggravation and environmental pollution, and make
At production cycle stretch-out, the production cost increases.Therefore urgently new manufacturing process meets new generation's carrier rocket large scale tank
The monolithic molding requirement of bottom.
Meanwhile it being based on light-weighted development trend, lightweighting materials gradually replace traditional steel, and with almag
Deng the alloy in lightweight for representative in the quasi-static forming of room temperature, forming property is very poor, and traditional plastic working technique cannot be very
The good processing for meeting this kind of alloy in lightweight.
Electro-magnetic forming is a kind of high-speed forming technology, in forming process due to electro plastic effect, mangneto plastic effect,
The couplings such as the inertia effect and strain rate hardening effect, can be obviously improved the forming limit of material.For large-scale shell
The monolithic molding of part, Chinese patent literature
CN105127284A discloses a kind of electromagnetism progressive molding method of hierarchical control, and this method is using top-down
Layered mode shapes, and only shapes local location every time, pad pasting range is gradually expanded, until completing the forming of entire workpiece.The party
Method solves the Problems in forming of large-scale sheet metal component, but when utilization this method forming, building mortion is complicated, and forming period is very long,
Plank will produce rebound with mold impingement, causes workpiece surface fairness poor, generates scraggly defect.Chinese patent literature
CN107413917A discloses a kind of large-scale sheet metal component electromagnetism progressive molding method based on plate face control shape, this method
It is discharged come the first floor and bottom of Forming Workpiece, using curved surface coil according to spiral shell by the movement of contour line tracking with planar spiral winding
The electric discharge of spin line track shapes other regions.This method preferably resolves that forming efficiency during electromagnetism progressive molding is relatively low, patch
The poor problem of model, but this method needs repeatedly to design curved surface coil during once-forming, curved surface coil
Difficulty of processing is very big, and cost is very high, and versatility is not strong.
In view of the above problems and defect, there is an urgent need for research and develop a kind of sheet metal component without mould entirety combined shaping method and device, to carry
High sheet metal component forming quality shortens forming period and simplifies building mortion.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the present invention provides a kind of progressive no mould of sheet metal component electromagnetism is whole
Bluk recombination manufacturing process and device are obtained properly it is intended that being shaped using finite element modelling by constantly adjusting each parameter
Analog result, and carry out coil processing, setting discharge parameter and discharge path according to analog result, carried out in conjunction with flanging component
Without mould electromagnetism progressive molding, finally accurate shaping is carried out using no core model spinning machine.Sheet metal component is realized by process above
Accurate monolithic molding, thus solve sheet metal component shaping surface it is of poor quality, can not monolithic molding or need be implemented as by mold
The technical issues of shape.
To achieve the above object, according to one aspect of the present invention, it is whole to provide a kind of progressive no mould of sheet metal component electromagnetism
Combined shaping method, which is characterized in that include the following steps：
(1) according to the size design flanging component of target formation of parts, the flanging component includes upper blank holder, lower flanging
Circle, blank holder supporting mechanism, wherein upper and lower blank holder, which matches, grips part to be formed；The blank holder supporting mechanism is set
It is placed in below the lower blank holder, is used to support and fixes blank holder up and down, and there are enough formings below part to be formed
Space；The target formation of parts refers to the part of required final shaping form；
(2) according to the size initial setting discharge coil parameter of target formation of parts, combining target formation of parts parameter, institute
It states the constraints suffered by discharge coil parameter, the flanging component parameter and part to be formed and establishes finite element model, it is described
Finite element model includes and the corresponding discharge coil model of the discharge coil, flanging assembly mould corresponding with the flanging component
Type and part model to be formed, for simulating device and forming process really without mould electromagnetism progressive molding；
(3) initial setting discharge parameter and discharge path in the finite element model, treat drip molding and are simulated
Forming；During simulation forming, discharge coil model is arranged on part model surface to be formed, according to the discharge parameter pair of setting
Part model to be formed applies corresponding electromagnetic force, and is moved on part model to be formed according to the discharge path of setting or quiet
Only；The discharge parameter includes discharge voltage, and the discharge path refers to the mobile route of discharge coil in forming process；
(4) size for simulating obtained drip molding and the size of the target formation of parts are compared, if the two
It is consistent, obtains discharge coil parameter, discharge parameter and the discharge path in this simulation, carry out step (5)；If the two is not
Symbol, then adjust discharge coil parameter, discharge parameter and discharge path, simulated again, repeats step (4)；
(5) the flanging component that step (1) designs is provided, the discharge coil parameter obtained according to step (4) processes discharge lines
Circle, and the discharge coil is connected in electro-magnetic forming equipment；Between part to be formed is pressed abd fixed on blank holder up and down, use
Blank holder supporting mechanism fixes blank holder up and down；
(6) discharge parameter and discharge path obtained according to step (4), is configured and is controlled by electro-magnetic forming equipment
System provides electric energy, to make the discharge coil generate the electricity needed for forming according to the discharge parameter to the discharge coil
Magnetic force, and control the discharge coil and run on part to be formed according to the discharge path, it carries out without mould electromagnetism progressive molding,
Obtain preform part；
(7) shaping is carried out to the preform piece surface shape that step (6) obtains using no core model spinning machine, obtains table
The target formation of parts of face flat smooth.
Further, the parameter of target formation of parts described in step (2) includes the conductivity, Poisson's ratio, elasticity of material
Modulus, density；The discharge coil parameter include discharge coil conductor cross-section size, the number of turns, turn-to-turn away from, the coil number of plies, layer
Spacing.
Further, the material of the target formation of parts is conductive material, can be aluminium alloy, magnesium alloy, copper
Any one of alloy.
Further, the shape of the target formation of parts can be simple shape, such as the Rocket tank of revolution shape
Bottom can also be complex casing part, such as the hood in irregular shape with multiple concave structures.
Further, machinable size range of the target formation of parts：Lengthwise dimension is in 800~6000 ㎜
Between, thickness direction size is between 1~10 ㎜, and wherein appearance and size is limited by current spinning machine specification.
Further, the discharge coil is planar spiral winding, and the coil number of plies is 1~3 layer, and winding wire section uses
Rectangular section or circular cross-section.Such coil is easy to process, and at low cost, versatile.
Further, discharge voltage described in step (3) is 6~20KV, in case discharge voltage is too small and production is caused to be imitated
Rate is low or guiding discharge coil life shortens due to discharge voltage is excessive, and ensures that sheet deformation is as uniform as possible.It is modeled to
When shape, discharge voltage follows the setting principle of certain rule when being arranged, and such as by small and greatly or by large and small sequence, is tried
Mistake, until simulation gained accessory size is consistent with target formation of parts size.
Further, forming mode takes the form of forming of successively discharging in step (3), and discharge coil is according to setting track
Mobile electric discharge after at one layer, electric discharge has shaped, continues to shape the second layer, until completely shaping part.
Further, the discharge parameter obtained in simulation in step (4) includes the size of each discharge voltage, road of discharging
Diameter includes the displacement of each discharge coil translation and angle, the complete number of plies for shaping part needs of rotation.
Further, the size for the drip molding that simulation obtains in step (4) is flat with the size of the target formation of parts
Equal error thinks that the two is consistent when within 2 ㎜, otherwise it is assumed that the two is not consistent.
Further, step (7) is specially：The preform parts fixation that step (6) is obtained is in no core model spinning machine
On, ensure that the Clamping Center of lathe is overlapped with the geometric center of the preform part, by setting internal rotary wheel and outer spinning roller
Mobile route makes the movement of roller in spinning carry out shaping to piece surface shape, generates the smooth target forming zero of surfacing
Part.
Further, the electro-magnetic forming equipment includes discharge assembly, computer control terminal, and the discharge assembly is used for putting
Electric coil is powered, the computer control terminal for discharge parameter and discharge path to be arranged, and control the discharge assembly according to
The discharge parameter provides electric energy to the discharge coil, to make the discharge coil generate the electromagnetic force needed for forming, and
It controls the discharge coil to run on part to be formed according to the discharge path, carry out without mould electromagnetism progressive molding.
Further, the pressure-pad-force that the blank holder up and down is applied to part to be formed is 10~30KN.
Further, in step (7) in shaping on no core model spinning machine, part is based on flexural deformation, part base
Material generates local flexural deformation, then gradually expands in entire part plate face under the action of internal rotary wheel and outer spinning roller, leads to
The contact condition of part plate face and internal rotary wheel is overregulated, the deformation of zonule continuous bend is kept.
No core model spinning machine is universal equipment, can carry out the shaping of different shape part.According to part ruler to be formed
It is very little, it is only necessary to replace corresponding roller and adjustment pole size.
It is another aspect of this invention to provide that providing a kind of progressive no mould monolithic molding device of sheet metal component electromagnetism, feature
It is, including discharge coil and flanging component, wherein
The discharge coil is connect with external electromagnetic former, electro-magnetic forming equipment be used for according to set discharge parameter as
The discharge coil power supply, and control the discharge coil and moved according to the discharge path of setting；The discharge coil, which is located at, to be waited for
Above drip molding, for providing the electromagnetic force needed for forming；
The parameter of the discharge coil, the discharge parameter, the discharge path are obtained by finite element analysis；
The flanging component includes upper blank holder, lower blank holder, multiple supporting rods and pedestal, wherein the upper blank holder
It is matched with the lower blank holder for gripping the part to be formed；On the upper blank holder and the lower blank holder one by one
It is correspondingly provided with multipair perforation；
Supporting rod one end is equipped with annular convex platform, and centre is the first cylinder, and the other end is equipped with diameter to be justified less than described first
Second cylinder of cylinder, second cylinder are equipped with screw thread in one end far from first cylinder；
The pedestal is equipped with multiple stepped holes, and the multiple supporting rod is each passed through the multiple stepped hole, passes through branch
The annular convex platform of strut one end is interference fitted with stepped hole so that supporting rod is fixed with the pedestal；The multiple supporting rod it is another
The second cylinder of one end be each passed through after the multipair perforation on upper and lower blank holder by nut be screwed so that support
Bar is fixed with upper and lower blank holder and part to be formed.
Further, the electro-magnetic forming equipment includes power subsystem, computer control terminal, and the power subsystem is used for
It powers for the form-wound coil, the computer control terminal is the electric discharge for controlling the power subsystem according to discharge parameter
Coil power supply, and control the discharge coil and run according to the discharge path of setting.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect：
1, the present invention carries out preliminarily forming using no mould electromagnetism progressive molding to plank, is carried out using no core model spinning machine
Accurate shaping, it can be achieved that different shape part accurately without mould monolithic molding；When different parts are formed, do not need
Mold, it is only necessary to process a set of flanging component, and for the identical a kind of workpiece of form diameter, flanging component can also lead to
With, it is also not required to design iterations and processes, the mold design and processing problems of very complicated, pole when thoroughly solving sheet metal component forming
The earth reduces production design and processing cost；
2, former includes discharge assembly, computer control terminal, belongs to versatility without core model spinning machine in the present invention
Equipment, therefore the present invention has very strong versatility, can significantly save overall manufacturing cost, meet diversified production need
It asks, and has the characteristics that environmentally protective, meet sustainable development requirement；
3, the present invention makes full use of advanced finite element analysis technology, and part of the same race is processed, it is only necessary to determine primary
Discharge coil parameter, discharge parameter and discharge path can meet the processing request of no mould electromagnetism progressive molding, process repeatability
By force；It can go out to utilize the optimal discharge lines needed for no mould electromagnetism progressive molding technology shaped objects part process with accurate simulation simultaneously
Enclose parameter, discharge parameter and optimal discharge path, need not as conventional method continuous trial and error, significantly shorten forming period,
Reduce production cost；
4, the present invention makes full use of the advantage of electro-magnetic forming, significantly carries using no mould electromagnetism progressive molding technology preform
The high forming limit of material, for answering extensively for the materials such as alloy in lightweight with good conductivity such as aluminium alloy, magnesium alloy, copper alloy
With providing a kind of important method；
5, the present invention is using the progressive preform of no mould electromagnetism and without core model spinning machine shaping, gained piece surface fairness
Very good, forming accuracy is greatly improved；And no core model spinning machine is only used for the last reforming process of part, to equipment tonnage
It is required that reducing, equipment cost can be significantly reduced；
6, zmodem of the invention, the preform part even processed in no mould electromagnetism progressive molding and reality
Need the dimensional discrepancy of part larger, can also be by adjusting subsequent no core model spinning shaping process, and then produce satisfaction
The part of production requirement, this effectively avoids the possibility for producing waste product, effectively improves the benefit of enterprise, avoids material
Waste；
7, applicability of the invention is extensive, and the production of different shape, various sizes of sheet metal component may be implemented, in principle,
No mould electromagnetism progressive molding can go out the part of arbitrary dimension with preform, and sole limitation condition is to consider cost factor, current nothing
Core model equipment maximum can only process length direction up to the part of 6000 ㎜.
Description of the drawings
Fig. 1 is the flanging component structure diagram of the progressive no mould monolithic molding device of electromagnetism in the embodiment of the present invention 1；
Fig. 2 is the supporting bar structure schematic diagram of flanging component in the embodiment of the present invention 1；
Fig. 3 is the schematic diagram of base structure of flanging component in the embodiment of the present invention 1；
Fig. 4 is the Technology Roadmap of the progressive no mould entirety combined shaping method of electromagnetism in the embodiment of the present invention 2；
Fig. 5 is the progressive no mould entirety combined shaping finite element model of electromagnetism in the embodiment of the present invention 2；
Fig. 6 (a) is the progressive no mould entirety combined shaping finite element model sectioned, three dimensional signal of electromagnetism in the embodiment of the present invention 2
Figure；
Fig. 6 (b) is the progressive no mould entirety combined shaping finite element model two-dimensional representation of electromagnetism in the embodiment of the present invention 2；
Fig. 7 (a) be in the embodiment of the present invention 2 discharge coil in circumferencial direction movement locus schematic diagram；
Fig. 7 (b) be in the embodiment of the present invention 2 discharge coil in axial mobile schematic diagram；
Fig. 8 is schematic cross-section after the completion of the progressive no mould entirety combined shaping of electromagnetism in the embodiment of the present invention 2；
Fig. 9 is in the embodiment of the present invention 2 without core model spinning machine shaping principle schematic.
In all the drawings, identical reference numeral is used for indicating identical element or structure, wherein：
1, pedestal 2, supporting rod 3, lower blank holder
4, upper blank holder 5, nut 6, plate to be formed
7, discharge coil 8, withstanding tight block 9, swinging strut
10, preform part 11, outer spinning roller 12, internal rotary wheel
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
Embodiment 1：
The embodiment of the present invention provides a kind of progressive no mould monolithic molding device of sheet metal component electromagnetism, it includes discharge coil and pressure
Side component, wherein
Discharge coil is planar spiral winding, and the coil number of plies is 1~3 layer, and winding wire section uses rectangular section.Such as figure
1 show flanging component, it includes upper blank holder 4, lower blank holder 3, supporting rod 2, pedestal 1, wherein straight inside and outside upper and lower blank holder
Diameter is designed according to the size of specific target formation of parts, and plate to be formed can be gripped by being matched by upper and lower blank holder
Part 6；Upper and lower blank holder, which corresponds, is equipped with 8 pairs of perforation；
It is illustrated in figure 2 supporting rod 2, supporting rod 2 there are 8, and 2 lower end of each supporting rod carries boss, and upper end carries cylinder
Shape step, upper end top are threaded；2 cylindrical step of supporting rod and the top diameter of thread and the perforation on upper and lower blank holder are straight
Diameter is consistent；
It is illustrated in figure 3 pedestal 1, pedestal 1 is annular shape, is equipped with 8 stepped holes, 8 supporting rods 2 are respectively from 8 platforms
After rank hole passes through, it is interference fitted with stepped hole by the boss on supporting rod 2, to make supporting rod 2 be relatively fixed with pedestal 1,
Then the upper end of 8 supporting rods is each passed through 8 perforation of lower blank holder and upper blank holder, and lower blank holder 3 is placed on supporting rod
On cylindrical step, upper blank holder 4 is placed on lower blank holder, and plate 6 to be formed is placed between blank holder up and down when work, is passed through
Blank holder and plate to be formed 6 above and below the nut fastening of M12, avoid plate 6 to be formed from being generated under the action of form-wound coil
The defects of sliding, and causing corrugation.
Embodiment 2：
It is assumed that target formation of parts shape is 1000 ㎜ of maximum gauge, thickness is 3 ㎜, the bulge shape of 400 ㎜ of depth capacity,
Aluminum alloy material.
As shown in figure 4, for the Technology Roadmap of the progressive no mould entirety combined shaping method of electromagnetism, finite element mould is first used
It is quasi-, simulation gained part is compared with accessory size to be formed, if the two, which is consistent, can use simulation gained discharge parameter
And discharge path carries out, without mould electromagnetism progressive molding, otherwise resetting discharge parameter and discharge path.Finally with no core model
Spinning machine carries out accurate shaping.By process above, the accurate monolithic molding of sheet metal component may be implemented.
Specifically, the progressive no mould entirety combined shaping method of electromagnetism includes the following steps in present embodiment：
Step 1：Design the progressive no mould entirety combined shaping flanging component of electromagnetism.
The flanging component uses the flanging component in embodiment 1, is not repeated to describe its structure composition herein, further
Ground, according to the size of target formation of parts, blank holder internal diameter is 1000 ㎜ up and down in flanging component, and outer diameter is 1200 ㎜.
Step 2：Establish finite element model.
Using the discharge coil in embodiment 1, further, according to the parameter of target formation of parts, Preliminary design electric discharge
7 a diameter of 200 ㎜ of coil, coil turn are 20 circles, and winding wire sectional dimension is 5 × 5 ㎜, and the coil number of plies is 2 layers.According to electricity
The progressive no mould entirety combined shaping flanging component parameter of magnetic, discharge coil parameter, target formation of parts parameter, have using ANSYS
The first simulation softward of limit establishes finite element model, the finite element model established as shown in figure 5, the finite element model sectioned, three dimensional
Shown in schematic diagram such as Fig. 6 (a), shown in two-dimensional representation such as Fig. 6 (b).
Step 3：The progressive no mould entirety combined shaping of finite element modelling electromagnetism
Initial setting discharge parameter and discharge path in above-mentioned finite element model, using ANSYS treat drip molding into
Row finite element modelling shapes；During simulation forming, discharge coil is arranged in plate surface to be formed, according to the electric discharge of setting
Parameter treats forming panels model and applies corresponding electromagnetic force, and is moved up in part model to be formed according to the discharge path of setting
It is dynamic or static；The discharge parameter includes discharge voltage, and the discharge path refers to the mobile road of discharge coil in forming process
Diameter；
As shown in Fig. 7 (a), the discharge path of simulation process is arranged：Before electric discharge starts, discharge coil is moved to away from blank holder
Horizontal direction distance be 10 positions ㎜ as first lap initial discharge position, hereafter every time using flanging circle center as rotation center rotation
30 ° of switch coil, carries out electric discharge forming, until turning again to initial position successively.Then by discharge coil to formation of parts
200 ㎜ are moved as the second circle initial discharge position in center, hereafter 30 ° of rotating coil centered on flanging circle center every time, according to
It is secondary to carry out electric discharge forming, the position until returning to the second circle initial discharge.It discharges moving coil to the center of formation of parts
Once, the above whole process is discharged for first layer.As shown in Fig. 7 (b), coil is then moved into initial position, coil is downward
It is moved to away from 1 positions ㎜ of piece surface, repeats the above steps, carry out second layer electric discharge forming.It successively discharges, until forming
Go out complete part, is illustrated in figure 8 model schematic cross-section after the completion of forming.Above each simulation discharge voltage is set as
8KV。
Step 4：Determine discharge parameter and discharge path.
The target formation of parts that the analog result of step (3) is required with actual production is compared, i.e. simulation gained zero
For the error of part size and target formation of parts size when within 2 ㎜, discharge parameter and discharge path employed in step 3 can
As final forming parameter, (5) are entered step, otherwise, adjust discharge coil parameter, discharge parameter and discharge path, again mould
Quasi- forming, repeats step (4).
Step 5：The progressive no mould monolithic molding device of electromagnetism is provided.
The flanging component that step 1 designs is provided, discharge coil 7 is processed according to the discharge coil parameter that step (4) obtains；It will
Plate 6 to be formed is pressed abd fixed between blank holder up and down, passes through blank holder and plate to be formed above and below the nut fastening of M12
6, it is ensured that in forming, plate will not slide under the action of electromagnetic force, in order to avoid generate ridging defect or sliding problem.
Step 6：Carry out the progressive no mould monolithic molding of electromagnetism.
Discharge coil 7 is connected on discharge equipment, according to discharge parameter and discharge path that step (4) obtains, is led to
It crosses computer control discharge coil and carries out electric discharge forming.After every layer has been discharged, moving coil to next layer, until completing entire metal plate
The forming of golden part obtains preform part.
Step 7：Without core model spinning machine shaping.
According to the size of the preform part 10 processed in step (6), select without core model spinning machine roller, and adjust
For pole size to adapt to a diameter of 1000 ㎜, depth is the preform part of 400 ㎜, as shown in figure 9, passing through withstanding tight block 8 and rotation
Turn pillar 9 by 10 clamping of preform part on no core model spinning machine, ensure that the Clamping Center of lathe is overlapped with workpiece centre,
It need to only be loaded primary.Clamping finishes, and the mobile route of internal rotary wheel 12 and outer spinning roller 11 is arranged, makes it along contour direction
Successively spinning shaping.Wherein, plate is based on flexural deformation, and blank is under the action of internal rotary wheel 12 and outer spinning roller 11, generation office
Then the flexural deformation in portion gradually expands in entire plate face, by adjusting the contact condition of part and internal rotary wheel 12, keep small
Region continuous bend deformation, obtains final part product.
Manufacturing process of the present invention designs flanging component according to target formation of parts size；According to material parameter, flanging group
Part, discharge coil parameter and constraints establish finite element model；It is discharged and is joined according to the size initial setting of target formation of parts
Number and discharge path simultaneously carry out sunykatuib analysis；The size of analog result and formation of parts is compared, if the two is consistent,
Carry out step in next step；Otherwise, previous step is returned to, until simulation gained accessory size is consistent with the size of formation of parts；It utilizes
Plate compact is set discharge parameter and discharge path by flanging component according to analog result, is carried out without mould electromagnetism progressive molding,
Obtain preform part；Obtained preform parts fixation is subjected to shaping on no core model spinning machine, satisfaction is obtained and adds
The final shape that work requires.Manufacturing process of the present invention realize large-scale sheet metal component without mould monolithic molding, effectively prevent part
The defect of surface relief injustice significantly improves the forming accuracy and surface quality of formation of parts, in addition, this method versatility
By force, it need to only prepare a set of flanging component when processing different product, substantially reduce the production cycle, significantly reduce large-scale metal plate
The production cost of golden part.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism, which is characterized in that include the following steps：
(1) according to the size design flanging component of target formation of parts, the flanging component include upper blank holder, lower blank holder,
Blank holder supporting mechanism, wherein upper and lower blank holder, which matches, grips part to be formed；The blank holder supporting mechanism is set to
Below the lower blank holder, it is used to support and fixes blank holder up and down, and there are enough formingspaces below part to be formed；
The target formation of parts refers to the part of required final shaping form；
(2) according to the size initial setting discharge coil parameter of target formation of parts, combining target formation of parts parameter described is put
Constraints suffered by electric coil parameter, the flanging component parameter and part to be formed establishes finite element model；
(3) initial setting discharge parameter and discharge path in the finite element model treat drip molding and carry out simulation forming；
During simulation forming, discharge coil model is arranged on part model surface to be formed, is treated into according to the discharge parameter of setting
Shape part model applies corresponding electromagnetic force, and is moved on part model to be formed according to the discharge path of setting or static；Institute
It includes discharge voltage to state discharge parameter；
(4) size for simulating obtained drip molding and the size of the target formation of parts are compared, if the two is consistent,
Discharge coil parameter, discharge parameter and the discharge path in this simulation are obtained, step (5) is carried out；If the two is not inconsistent,
Discharge coil parameter, discharge parameter and discharge path are adjusted, is simulated again, step (4) is repeated；
(5) the flanging component that step (1) designs is provided, the discharge coil parameter obtained according to step (4) processes discharge coil, and
The discharge coil is connected in electro-magnetic forming equipment；Between part to be formed is pressed abd fixed on blank holder up and down, flanging is used
It encloses supporting mechanism and fixes blank holder up and down；
(6) discharge parameter and discharge path obtained according to step (4), is configured and is controlled by electro-magnetic forming equipment,
Electric energy is provided to the discharge coil according to the discharge parameter, to make the discharge coil generate the electromagnetism needed for forming
Power, and control the discharge coil and moved on part to be formed according to the discharge path, without mould electromagnetism progressive molding, obtain
To preform part；
(7) shaping is carried out to the preform piece surface shape that step (6) obtains using no core model spinning machine, it is flat obtains surface
Whole smooth target formation of parts.
2. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism as described in claim 1, which is characterized in that step
(2) parameter of target formation of parts described in includes conductivity, Poisson's ratio, elasticity modulus, the density of material；The discharge coil ginseng
Number include discharge coil conductor cross-section size, the number of turns, turn-to-turn away from, the coil number of plies, interlamellar spacing.
3. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism as described in claim 1, which is characterized in that described
The material of target formation of parts is conductive material, is any one of aluminium alloy, magnesium alloy, copper alloy.
4. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism as described in claim 1, which is characterized in that described
Discharge coil is planar spiral winding, and the coil number of plies is 1~3 layer, and winding wire section uses rectangular section or circular cross-section.
5. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism as described in claim 1, which is characterized in that step
(3) discharge voltage described in is 6~20KV, in case discharge voltage is too small and leads to low production efficiency or due to discharge voltage is excessive
Guiding discharge coil life shortens, and ensures that sheet deformation is as uniform as possible.
6. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism as described in claim 1, which is characterized in that step
(3) forming mode takes the form for forming of successively discharging, discharge coil to be discharged at one layer according to the movement electric discharge of setting track in
After shape is complete, continue to shape the second layer, until completely shaping part.
7. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism as described in claim 1, which is characterized in that step
(4) discharge parameter obtained in simulation in includes the size of each discharge voltage, and discharge path includes each discharge coil translation
Displacement and rotation angle, the complete number of plies for shaping part needs.
8. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism as described in claim 1, which is characterized in that step
(4) size of drip molding that simulation obtains in thinks with the mean error of the size of the target formation of parts when within 2 ㎜
The two is consistent, otherwise it is assumed that the two is not consistent.
9. a kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism as described in claim 1, which is characterized in that step
(7) it is specially：The preform parts fixation that step (6) is obtained ensures the Clamping Center of lathe on no core model spinning machine
It is overlapped with the geometric center of the preform part, by setting the mobile route of internal rotary wheel and outer spinning roller, makes roller in spinning
Movement carries out shaping to piece surface shape, generates the smooth target formation of parts of surfacing.
10. a kind of progressive no mould monolithic molding device of sheet metal component electromagnetism, which is characterized in that including discharge coil and flanging component,
Wherein,
The discharge coil is connect with external electromagnetic former, and electro-magnetic forming equipment is used to according to discharge parameter is set be described
Discharge coil is powered, and is controlled the discharge coil and moved according to the discharge path of setting；The discharge coil is located to be formed
Above part, for providing the electromagnetic force needed for forming；
The parameter of the discharge coil, the discharge parameter, the discharge path are obtained by finite element analysis；
The flanging component includes upper blank holder, lower blank holder, multiple supporting rods and pedestal, wherein the upper blank holder and institute
Lower blank holder is stated to match for gripping the part to be formed；It is corresponded on the upper blank holder and the lower blank holder
Equipped with multipair perforation；
Supporting rod one end is equipped with annular convex platform, and centre is the first cylinder, and the other end is equipped with diameter and is less than first cylinder
The second cylinder, second cylinder far from first cylinder one end be equipped with screw thread；
The pedestal is equipped with multiple stepped holes, and the multiple supporting rod is each passed through the multiple stepped hole, passes through supporting rod
The annular convex platform of one end is with stepped hole by interference fit so that supporting rod is fixed with the pedestal；The multiple supporting rod it is another
The second cylinder of one end be each passed through after the multipair perforation on upper and lower blank holder by nut be screwed so that support
Bar is fixed with upper and lower blank holder and part to be formed.
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| CN201810457158.XA CN108543854B (en) | 2018-05-14 | 2018-05-14 | A kind of progressive no mould entirety combined shaping method of sheet metal component electromagnetism and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309261A (en) * | 2021-12-24 | 2022-04-12 | 广东工贸职业技术学院 | Progressive forming bending method for double-curved-surface metal plate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19838120A1 (en) * | 1998-08-21 | 2000-02-24 | Bayerische Motoren Werke Ag | Divisible magnetic reshaping coil generating toroidal, pulsed magnetic field in coaxial arrangement with workpiece to be reshaped |
| CN106807825A (en) * | 2017-04-12 | 2017-06-09 | 华中科技大学 | A kind of progressive flexible compound manufacturing process of electromagnetism |
| CN107413917A (en) * | 2017-07-05 | 2017-12-01 | 华中科技大学 | A kind of large-scale metal sheet electromagnetism progressive molding method based on plate face control shape |
-
2018
- 2018-05-14 CN CN201810457158.XA patent/CN108543854B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19838120A1 (en) * | 1998-08-21 | 2000-02-24 | Bayerische Motoren Werke Ag | Divisible magnetic reshaping coil generating toroidal, pulsed magnetic field in coaxial arrangement with workpiece to be reshaped |
| CN106807825A (en) * | 2017-04-12 | 2017-06-09 | 华中科技大学 | A kind of progressive flexible compound manufacturing process of electromagnetism |
| CN107413917A (en) * | 2017-07-05 | 2017-12-01 | 华中科技大学 | A kind of large-scale metal sheet electromagnetism progressive molding method based on plate face control shape |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309261A (en) * | 2021-12-24 | 2022-04-12 | 广东工贸职业技术学院 | Progressive forming bending method for double-curved-surface metal plate |
| CN114309261B (en) * | 2021-12-24 | 2023-05-16 | 广东工贸职业技术学院 | Progressive forming bending method for hyperboloid metal plate |
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| CN108543854B (en) | 2019-09-06 |
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