CN110188416A - A kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method - Google Patents
A kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method Download PDFInfo
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- CN110188416A CN110188416A CN201910396454.8A CN201910396454A CN110188416A CN 110188416 A CN110188416 A CN 110188416A CN 201910396454 A CN201910396454 A CN 201910396454A CN 110188416 A CN110188416 A CN 110188416A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/203—Drawing of straight lines or curves
Abstract
The present invention discloses a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method.The present invention determines reasonable theoretical formula according to electric control permanent magnet flange fixing installation first, then specifying initial spacing, it is assumed that under conditions of some final spacing, the magnetic attraction that magnetic suction disc generates in pressure plate under each spacing condition is calculated separately using magnetic field analysis, curve A is drawn, then under the premise of giving initial spacing and magnetic attraction, actual final spacing is calculated using stress analysis, curve B is drawn, the line of curve B intersection point corresponding with curve A is exactly required solution.After the present invention obtains curve graph using magnetic coupling calculation method, want to obtain great magnetic attraction i.e. pressure-pad-force, it only needs to determine initial spacing by curve graph, then practical flange fixing installation is adjusted by this value, it ensure that convenient, fast when subsequent use and more accurate, it does not need to be coupled or iterated to calculate every time, is greatly saved time cost and amount of calculation.
Description
Technical field
The present invention relates to Sheet drawing molding fields, and in particular to a kind of electric control permanent magnet flange fixing installation magnetic coupling calculating
Method.
Background technique
Drawing refers to using mold, and the certain shapes plate blank obtained after punching is struck out various open hollows zero
Part reduces the diameter open hollow blank, increases a kind of mechanical processing technique of height.It is exactly in simple terms by slab convex
Under mould effect, the blank annular section that is placed between cavity plate and blank holder, which generates, is plastically deformed and is constantly drawn into punch-pin and recessed
Gap between mould and form part.Deep-drawing technique is in industrial departments such as automobile, aircraft, tractor, electric appliance, instrument, electronics
Occupy considerable status in production process.
Since in drawing process, the diameter of slab outer rim can be gradually reduced, slab thickness is caused to increase, and then slab exists
It arches upward under the action of tangential pressure and forms gauffer.The generation of this wrinkling in order to prevent.Would generally using blank holder,
Pressure plate etc. carries out flanging to slab, provides pressure-pad-force.There are many kinds of the methods for providing pressure-pad-force now, and the latest development becomes
Gesture is to carry out flanging using magnetic force, provides pressure-pad-force, and the technology for providing pressure-pad-force in particular by electric control permanent magnet method has very
Big development prospect.Electric control permanent magnet crimping technique is to provide magnetic force using permanent-magnet material, is produced by the magnetic field of magnetic suction disc
Sucker and pressure plate are sucked raw magnetic attraction, and the slab of centre clamping is compressed and provides pressure-pad-force.For different rule
The slab of lattice, unlike material, required pressure-pad-force size are also not quite similar, and pressure-pad-force is too small to will lead to slab corrugation, and presses
Side power is excessive and limits due material flowing, will lead to slab by drawing crack.Therefore, select suitable pressure-pad-force to Guan Chong
It wants.
In electric control permanent magnet pressing method, under the premise of magnetic suction disc magnetic field strength is certain, the size of magnetic attraction mainly by
Gap between magnetic suction disc and pressure plate controls because the magnetic resistance of air is bigger, magnetic flux leakage than more serious, with
The increase in gap, the magnetic attraction between magnetic suction disc and pressure plate will reduce, and then reduce pressure-pad-force.Therefore, selection is suitable big
Small pressure-pad-force is substantially exactly determination under a certain gap condition the problem of the available magnetic attraction in magnetic field.
Because magnetic suction disc and pressure plate can be deformed, and deform posterior sucker and pressure plate with the application of magnetic attraction
Between spacing magnetic attraction will be made to increase again the spacing for becoming smaller, and becoming smaller again, and then the deformation of sucker is tighter
Weight, the spacing between sucker and pressure plate further reduces, until sucker rigidity reaches permitted limiting condition, magnetic at this time
Pressure-pad-force provided by magnetic attraction between power sucker and pressure plate is only the actual value being finally applied on slab.This is anti-
The process nature iterated to calculate again is exactly the magnetic coupling computational problem in a magnetic field and the field of force.And in order to provide some really
The pressure-pad-force of definite value, under the premise of magnetic suction disc magnetic field strength is certain, it is thus necessary to determine that first between magnetic suction disc and pressure plate
Beginning spacing, so that magnetic attraction generated when reaching final spacing under the magnetic force and pressure-pad-force are required values.
In order to set a reasonable initial spacing between magnetic suction disc and pressure plate in order to provide required flanging
Force value needs to carry out complicated coupling and calculates, either uses theoretical method or FInite Element, all can not very good solution
This problem.
Summary of the invention
In view of the above technical problems, the purpose of the present invention is to provide a kind of electric control permanent magnet flange fixing installation magnetic coupling meters
Calculation method, can be under the premise of specified pressure-pad-force, and the interpolation curve figure determined using this method can be obtained required
Initial spacing between magnetic suction disc and pressure plate, to obtain the flanging force value of anticipation.
In order to solve above-mentioned technical problem, the method for the invention is achieved through the following technical solutions:
A kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method, includes the following steps,
Step 1 obtains the first reference curve figure according to the first reference data, the first primary data；
Step 2 obtains the second reference curve figure according to the second reference data, the second primary data；
Step 3 forms third reference curve, and root according to the first reference curve figure, second reference curve
The magnetic attraction under target spacing is determined according to the third reference curve.
Above-mentioned a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method, wherein the step 1 specifically includes:
The first calculation method and the first initial spacing threshold are obtained according to the first reference data；
First object threshold value is obtained according to first calculation method and the first initial spacing threshold；In described
One targets threshold obtains the first active force in the state of matching first reference data；
First reference is formed according to the first object threshold value, first primary data, first active force
Curve graph.
Above-mentioned a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method, wherein the step 2 specifically includes:
The second primary data is formed according to the second reference data, the second calculation method；
The second target reference is formed according to second primary data；
The second target basic data is formed according to the second reference data and the second target reference；
The second reference curve figure is formed according to second target data, second primary data.
Above-mentioned a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method, wherein second reference data includes
This vertical direction put displacement, deformation state in initial spacing, deformation state press plate between magnetic suction disc and pressure plate
Corresponding points are displaced in vertical direction on magnetic suction disc；
The second target reference is formed according to second primary data are as follows:
J2=J1-W1-W2；
Initial spacing of the J1 between magnetic suction disc and pressure plate；
W1 is the vertical direction displacement of this point in deformation state press plate；
Corresponding points are displaced in vertical direction on W2 undeformed state magnetic suction disc；
J2 is the second target reference；
The second target data is formed according to second object reference data are as follows:
[K]=1/ (1/ [K1]+1/ [K2])；
[K1] is that the rigidity of pressure plate is；
[K2] is that the rigidity of magnetic suction disc is.
Above-mentioned a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method, wherein second target data and institute
State the relationship between the second primary data are as follows:
{ P }=[K] ({ J1 }-{ J2 })；
Wherein, P is a predefined parameter.
Above-mentioned a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method, wherein according to first calculation method
First object threshold value is obtained with the described first initial spacing threshold；It specifically includes:
Finite element model is formed according to the first reference data, the first calculation method and the first initial spacing threshold；
The magnetic force of the finite element model is calculated according to finite element model.
By adopting the above technical scheme, compared with prior art, the present invention having the following beneficial effects:
Complicated coupled field computation is eventually converted into and asks by the simple mathematical that curve graph carries out interpolation calculation by the present invention
Topic, while capable of effectively ensuring reasonable pressure-pad-force, moreover it is possible to the workload computed repeatedly can be greatly reduced.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
Some embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to these attached drawings.
Fig. 1 is a kind of magnetic suction disc, slab and binder plate arrangement provided in an embodiment of the present invention；
Fig. 2 is the spacing schematic diagram of magnetic suction disc and pressure plate；
Fig. 3 is the FEM model schematic diagram of magnetic field analysis；
Fig. 4 is curve graph of the magnetic force with primary clearance variation and the variation of final gap；
Fig. 5 is the top view of the arrangement of magnetic suction disc upper magnetic pole；
Fig. 6 is initial spacing 0.5mm and spacing picture method of final spacing when being 0.4mm at magnetic pole solves schematic diagram；
Fig. 7 is stiffness curve of the flange fixing installation under different initial spacing conditions；
Fig. 8 is merging Fig. 6 and Fig. 7, and according to the curve C of each intersections of complex curve drafting；
In figure, 1. pressure plates；2. slab；3. magnetic suction disc；4. air gap；Magnetic pole on the outside of 3-1；Magnetic pole on the inside of 3-2；
3-3. magnetic suction disc adjustment height region；3-4. sucker entity area.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in the embodiment of the present invention
Technical solution is clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than complete
The embodiment in portion.
A kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method, includes the following steps,
Step 1 obtains the first reference curve figure according to the first reference data, the first primary data；
Step 2 obtains the second reference curve figure according to the second reference data, the second primary data；
Step 3 forms third reference curve, and is joined according to third according to the first reference curve figure, the second reference curve
It examines curve and determines magnetic attraction under target spacing.
Further, step 1 specifically includes: according to the first reference data obtain the first calculation method and first it is initial between
Away from threshold value；First object threshold value is obtained according to the first calculation method and the first initial spacing threshold；It is matched in first object threshold value
The first active force is obtained in the state of first reference data；According to first object threshold value, the first primary data, the first active force
Form the first reference curve figure.
Further, step 2 specifically includes: forming the second initial number according to the second reference data, the second calculation method
According to；The second target reference is formed according to the second primary data；The is formed according to the second reference data and the second target reference
Two target basic datas；The second reference curve figure is formed according to the second target data, the second primary data.
Further, the second reference data includes that initial spacing between magnetic suction disc and pressure plate, deformation state push
The vertical direction that this puts on flitch is displaced, corresponding points are displaced in vertical direction on deformation state magnetic suction disc；It is initial according to second
Data form the second target reference are as follows: J2=J1-W1-W2；Wherein, between initial between magnetic suction disc and pressure plate of J1
Away from；W1 is the vertical direction displacement of this point in deformation state press plate；Corresponding points exist on W2 undeformed state magnetic suction disc
Vertical direction displacement；J2 is the second target reference；The second target data is formed according to the second object reference data are as follows: [K]=
1/(1/[K1]+1/[K2])；[K1] is that the rigidity of pressure plate is；[K2] is that the rigidity of magnetic suction disc is.
Further, the relationship between the second target data and the second primary data are as follows: { P }=[K] ({ J1 }-{ J2 })；
Wherein, P is a predefined parameter.
Further, first object threshold value is obtained according to the first calculation method and the first initial spacing threshold；Specific packet
It includes: finite element model is formed according to the first reference data, the first calculation method and the first initial spacing threshold；According to finite element
The magnetic force of model calculating finite element model.
Below in conjunction with attached drawing of the invention, technical solution of the present invention is clearly and completely described.
Fig. 1 is to illustrate the present invention, it is assumed that a kind of magnetic suction disc, slab and binder plate arrangement.Such as Fig. 1 institute
Show, entire electric control permanent magnet flange fixing installation includes magnetic suction disc 3, slab 2 and pressure plate 1, and magnetic suction disc 3 passes through magnetic pole thereon
Magnetic attraction is generated, its own is sucked with pressure plate 1 and clamps intermediate slab 2, realizes the application of pressure-pad-force.In order to true
Surely it using primary clearance to be used is needed when a certain pressure-pad-force, needs to carry out magnetic coupling calculating, using one kind of the invention
Electric control permanent magnet flange fixing installation magnetic coupling calculation method, specific implementation process are as follows:
1, as shown in Figs. 1-2, under magneticaction, entire flange fixing installation deforms, magnetic suction disc 3 and pressure after deformation
The spacing of flitch 1 changes, and middle position is since there are slab 2, spacing is constant, but outer peripheral spacing becomes smaller, and spacing
Become smaller and magnetic attraction is further increased, thus this is the coupled problem of a structure and magnetic field.
As shown in Fig. 2, set initial spacing between magnetic suction disc 3 and pressure plate 1 as J1, after final deformation reaches balance,
Final spacing between arbitrarily corresponding two points (one is located on magnetic suction disc 3, and one is located in pressure plate 1) of outer edge
For the magnetic attraction that J2, P are between the two points, W1 is vertical direction displacement of this point in pressure plate 1 after deforming, and W2 is deformation
Corresponding points are displaced in vertical direction on magnetic suction disc 3 afterwards, then between final between available magnetic suction disc 3 and pressure plate 1
Away from formula it is as follows:
J2=J1-W1-W2 (1)
Set the rigidity of pressure plate 1 again as [K1], the rigidity of magnetic suction disc 3 is [K2], then can be obtained between magnetic force and displacement
Theoretical formula:
P=[K1] W1=[K2] W2 (2)
At this point, seeking the formula (1) of final spacing J2 can deform are as follows:
J2=J1-P/ (1/ [K1]+1/ [K2]) (3)
It is exactly using the expression-form of power by formula (3):
P=[K] (J1-J2) (4)
The meaning that formula (4) represents are as follows: outer edge corresponds to the overall stiffness that the magnetic force between two o'clock is equal to flange fixing installation
Multiplied by final spacing, the wherein overall stiffness [K]=1/ (1/ [K1]+1/ [K2]) of flange fixing installation.
As magnetic suction disc 3 and pressure plate 1, each pair of node present on 2 bearing positions from edge to slab all meets
Formula (4), therefore the relationship that formula (4) can be extended between the power of entire flange fixing installation and final spacing:
{ P }=[K] ({ J1 }-{ J2 }) (5)
In formula (5), to the specific slab of Mr. Yu, such as the pressure-pad-force that slab 2 needs in Fig. 2 is determined by experience,
Equal to the magnetic force P applied, i.e. P belongs to known quantity；For specific flange fixing installation, rigidity [K] is different with the active position of P
And change, the method that finite element can be used acquires, and belongs to unknown quantity；Initial spacing is artificially specified variable, is known quantity；
Final spacing needs finite element analysis and obtains, and also belongs to unknown quantity；Therefore, formula (5) is the equation comprising two unknown quantitys,
It needs to solve using the method that coupling calculates.
2, for slab 2 as shown in Figure 2, it is assumed that, with a thickness of 0.8mm, the pressure-pad-force needed is larger for it, in order to guarantee
Enough to generate so big magnetic attraction, rule of thumb the initial spacing J1 then between magnetic suction disc 3 and pressure plate 1 is not exceeded
0.5mm can be adjusted by adjusting the height in the region under slab 2 of magnetic suction disc 3, guarantee that initial spacing is no more than 0.5mm；
And since magnetic suction disc 3 after stress and pressure plate 1 can deform, if the too small the two that may result in of initial spacing connects
Touching, in order to avoid such case, initial spacing is also no less than 0.2mm.Accordingly, it is determined that between magnetic suction disc 3 and pressure plate 1
Initial spacing J1 should be within the scope of 0.2mm~0.5mm.
3, according under multiple initial spacing conditions of selection, finite element model as shown in Figure 3 is established, using magnetic field
Finite element method, respectively under respective initial spacing condition, it is assumed that the final spacing between magnetic suction disc 3 and pressure plate 1 is
When following table, the magnetic attraction that magnetic suction disc 3 can generate in pressure plate 1 is calculated, is mentioned in the destination file of Finite Element Magnetic Field Analysis
This magnetic attraction is taken, shown in table specific as follows, is defined as table 1:
4, according in upper table as a result, drawing magnetic attraction with the curve graph A, such as Fig. 4 of initial spacing and the variation of final gap
Shown, wherein ordinate is magnetic attraction, and abscissa is final spacing, and curve A1 represents initial spacing as the curve of 0.1mm,
And so on, curve A4 represents initial spacing as the curve of 0.5mm, and each curve shown in Fig. 4 represents between difference is initial
Away from available magnetic attraction under, different final spacing；
5, as shown in figure 5, the center line of two groups of magnetic pole units apart from the outer peripheral distance of magnetic suction disc be respectively 80mm and
50mm, by taking the final spacing of initial spacing 0.5mm is 0.4mm as an example, as shown in fig. 6, can be determined at this time using drawing
Spacing is respectively 0.466mm and 0.431mm at the magnetic pole 3-2 of side and at outside magnetic pole 3-1；
6, according to the calculated result of step 5, final spacing at available inside magnetic pole 3-2 and outside magnetic pole 3-1
Ratio is 0.466/0.431=1.0812, that is, representing the magnetic attraction on the magnetic pole 3-1 unit area of outside is that inside magnetic pole 3-2 is mono-
1.0812 times of the upper magnetic attraction of plane product；Further according to the area of inside magnetic pole 3-2 and outside magnetic pole 3-1, guarantee effect is all
Total magnetic force on magnetic pole is equal to the resulting 91256N of magnetic field analysis (being shown in Table 1), the list acted on available inside magnetic pole 3-2
Plane product power is 1.102394144MPa, and the unit area power acted on the magnetic pole 3-1 of outside is 1.123450658MPa；It repeats
Using above-mentioned step 5 and step 6, available different initial spacing act on interior outside magnetic pole under Bu Tong final spacing
On unit area power, i.e. as a result as shown in the table unit pressure load value is defined as table 2；
It should be noted that the calculating of this step determines the stiffness curve of entire flange fixing installation for subsequent, and ought be most
When whole spacing is identical with initial spacing, illustrating that device is to complete rigidity, stiffness curve is entirely vertical, so do not count
Necessity of calculation；
7, according to multiple initial spacing conditions of selection, the finite element model of stress field is established, using stress finite element
Analysis method calculates resulting unit area load in interior outer magnetic pole unit and corresponding pressure plate region application table 2 respectively,
The deformation of magnetic suction disc and pressure plate is calculated, the vertical direction shift value at outer rim is extracted, and determine final spacing, then adopts
It is as a result exactly the rigidity of required flange fixing installation with total magnetic attraction divided by resulting final spacing is calculated herein, according to calculating institute
The rigidity value obtained, brings into formula (3), so that it may calculate under given magnetic attraction and initial spacing condition (i.e. using magnetic
Field analysis calculate it is assumed that final spacing condition under available magnetic attraction), the final spacing of the outer peripheral reality of flange fixing installation
Value, calculated result is as shown in the table, is defined as table 3；
8, according to the calculated result of table 3, it is with the curve graph under the conditions of given magnetic attraction, i.e., whole to draw practical finally spacing
Stiffness curve of a device under different initial spacing, as shown in Figure 7；
9, the curve in Fig. 4 and Fig. 7 is incorporated into Fig. 8, takes the intersection point (A1- of two curves under corresponding grade respectively
B1, A2-B2, A3-B3, A4-B4) be the theoretical formula solution, be exactly to be used for by obtained curve C after the connection of each intersection point
Determine the initial spacing needed under the conditions of selected magnetic force.
It is determined for rule of thumb selecting a certain magnetic force value by the curve C that 9 above-mentioned steps are drawn
When as pressure-pad-force, it should choose great initial spacing, i.e., the curve drawn in step 9 according to the value for choosing pressure-pad-force
Ordinate in figure, which is drawn up, to be done horizontal linear and intersects with curve C, is then assured that this point distance A1~A4 using graphing method
The distance of curve, and use interpolation method determines the occurrence of initial spacing.
The Integral Thought of above-mentioned 9 steps are as follows: specifying initial spacing, it is assumed that under conditions of some final spacing, utilize
Magnetic field analysis calculates separately the magnetic attraction that magnetic suction disc generates in pressure plate under each spacing condition, draws curve A, then exists
Under the premise of giving initial spacing and magnetic attraction, actual final spacing is calculated using stress analysis, draws curve B, curve B with
The line of the corresponding intersection point of curve A is exactly required solution.
For the electric control permanent magnet flange fixing installation of a certain determination, curve C is obtained using magnetic coupling calculation method of the invention
Afterwards, it is desirable to obtain great magnetic attraction i.e. pressure-pad-force, it is only necessary to initial spacing is determined by curve C, it is then practical by the adjustment of this value
Flange fixing installation, this guarantees convenient, fast when subsequent use and more accurate, do not need to carry out every time coupling or
Person's iterative calculation, is greatly saved time cost and amount of calculation.
Claims (6)
1. a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method, it is characterised in that: include the following steps,
Step 1 obtains the first reference curve figure according to the first reference data, the first primary data；
Step 2 obtains the second reference curve figure according to the second reference data, the second primary data；
Step 3 forms third reference curve according to the first reference curve figure, second reference curve, and according to described
Third reference curve determines the magnetic attraction under target spacing.
2. a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method according to claim 1, which is characterized in that described
Step 1 specifically includes:
The first calculation method and the first initial spacing threshold are obtained according to the first reference data；
First object threshold value is obtained according to first calculation method and the first initial spacing threshold；In the first object
Threshold value obtains the first active force in the state of matching first reference data；
First reference curve is formed according to the first object threshold value, first primary data, first active force
Figure.
3. a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method according to claim 2, which is characterized in that described
Step 2 specifically includes:
The second primary data is formed according to the second reference data, the second calculation method；
The second target reference is formed according to second primary data；
The second target basic data is formed according to the second reference data and the second target reference；
The second reference curve figure is formed according to second target data, second primary data.
4. a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method according to claim 3, which is characterized in that described
Second reference data include initial spacing between magnetic suction disc and pressure plate, in deformation state press plate this point vertical side
Corresponding points are displaced in vertical direction on displacement, deformation state magnetic suction disc；
The second target reference is formed according to second primary data are as follows:
J2=J1-W1-W2；
Initial spacing of the J1 between magnetic suction disc and pressure plate；
W1 is the vertical direction displacement of this point in deformation state press plate；
Corresponding points are displaced in vertical direction on W2 undeformed state magnetic suction disc；
J2 is the second target reference；
The second target data is formed according to second object reference data are as follows:
[K]=1/ (1/ [K1]+1/ [K2])；
[K1] is that the rigidity of pressure plate is；
[K2] is that the rigidity of magnetic suction disc is.
5. a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method according to claim 4, which is characterized in that described
Relationship between second target data and second primary data are as follows:
{ P }=[K] ({ J1 }-{ J2 })；
Wherein, P is a predefined parameter.
6. a kind of electric control permanent magnet flange fixing installation magnetic coupling calculation method according to claim 2, which is characterized in that according to
First calculation method and the first initial spacing threshold obtain first object threshold value；It specifically includes:
Finite element model is formed according to the first reference data, the first calculation method and the first initial spacing threshold；
The magnetic force of the finite element model is calculated according to finite element model.
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| CN111940586A (en) * | 2020-08-20 | 2020-11-17 | 合肥工业大学 | Distributed blank holder force generation device and regulation and control method for box type stamping process based on electro-permanent magnet compounding |
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