CN109033512A - A kind of determination method of the optimal blade shape of fine blanking die - Google Patents
A kind of determination method of the optimal blade shape of fine blanking die Download PDFInfo
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- CN109033512A CN109033512A CN201810620605.9A CN201810620605A CN109033512A CN 109033512 A CN109033512 A CN 109033512A CN 201810620605 A CN201810620605 A CN 201810620605A CN 109033512 A CN109033512 A CN 109033512A
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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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- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention belongs to technology of die manufacturing fields, disclose a kind of determination method of optimal blade shape of fine blanking die, comprising: step 1, simulation obtains the region that die point is plastically deformed in fine process；Step 2, cutting edge region to be analyzed is determined；Step 3, at least one of cutting edge deformation quantity method of discrimination, cutting edge internal stress method of discrimination and mold entirety stress method of discrimination method of discrimination is selected to determine blade shape；Step 4, it obtains determining result.The beneficial effect comprise that simulating the stress and plastic deformation of die point in certain part process using finite element software, and determined, help differentiates optimal blade shape, has many advantages, such as that versatile, accuracy is high, at low cost, risk is small.
Description
Technical field
The present invention relates to technology of die manufacturing fields, more particularly, to a kind of judgement side of the optimal blade shape of fine blanking die
Method.
Background technique
The generally circular cutting edge of fine blanking die cutting edge, and radius of corner is much smaller compared with common die radius of corner, fine blanking die
Having fillet R is about 0.01~0.1mm.
Since opposition of fine blanking die during military service by plate is larger, and it is concentrated mainly on the sword of mold
Oral area position, die point part interior are easiest to crack initiation, lead to mould invalidation.In order to promote die life, as much as possible
Stress, the deformation at die point position are reduced, there are two types of the main modes of current optimization die point shape.First is that according to engineering
The experience of teacher constantly modifies the blade shape of mold, second is that increasing superplastic.Former approach there are certain risk,
It cannot be guaranteed that obtaining stable die life, and optimizing cycle is longer, applicable versatility is not strong.Later approach is easy to lead
Cause part burr excessively high.The general character of the above problem is can not scientifically to guarantee that die point shape is in optimum state.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, a kind of judgement side of optimal blade shape of fine blanking die is proposed
Method solves the technical issues of determining mold optimal blade shape without science in the prior art.
To reach above-mentioned technical purpose, the present invention provides a kind of determination method of the optimal blade shape of fine blanking die, packets
Include following steps:
Step 1, for the initial mould blade shape of certain part setting, 1 mould is done to the fine process of the part
Quasi- circulation, obtains the region that die point is plastically deformed in fine process.
Step 2, cutting edge region to be analyzed is determined comprising the region being plastically deformed, and moulded to described
Property deformation area peripheral edge extend region.Elongated area should not be too large, in order that guaranteeing that the region being plastically deformed can
It is included in judgement, improves the accuracy of judgement.
Step 3, following at least one method of discrimination is selected to determine the blade shape in cutting edge region to be analyzed: cutting edge
Deformation quantity method of discrimination, cutting edge internal stress method of discrimination and mold entirety stress method of discrimination.
The cutting edge deformation quantity method of discrimination, it is therefore intended that guarantee that blade shape is stablized comprising following steps:
Step 3.1.1 enables the cutting edge region to be analyzed by the cutting edge region projection to be analyzed in Cartesian Coordinategrid
Interior grid node imQuantity is m, and coordinate is followed successively by i1(x1, y1, z1)、i2(x2, y2, z2)……im(xm, ym, zm)；
Step 3.1.2 successively calculates the deflection D of the node i at cutting edge position in a newest simulation loopi,n, cutting edge portion
Position averaged deformation amount DnAnd the variance of cutting edge deformation quantity
Wherein, n indicates current total simulation loop number；M indicates the node at the fine blanking die cutting edge position of current research
Quantity；D1,n、D2,n、…、Dm,nRespectively indicate the 1st cutting edge node under n-th simulation loop, the 2nd cutting edge node ... m
The deformation quantity of a cutting edge node；DnFor D1,n、D2,n、…、Dm,nMean value,For D1,n、D2,n、…、Dm,nVariance；
Step 3.1.3 judges " Dn<D0, and" whether true, then determine that blade shape meets if it is "Yes"
Criterion in method of discrimination, i.e., the blade shape that preliminary acquisition mold updates after being influenced by plastic deformation；If it is "No",
Then determine that blade shape is unsatisfactory for the criterion in method of discrimination；Wherein, D0For the differentiation of cutting edge column joints deformation amount average value
Standard value, value logic depend on the mould and die accuracy standard in fine industry, generally cannot be less than 0.01mm, be not greater than
0.1mm；For the discrimination standard value of cutting edge column joints deformation amount variance, value logic is D05~20%.
The cutting edge maximum internal stress method of discrimination, it is therefore intended that ensure the decline of cutting edge concentrated stress and tends towards stability,
Include the following steps:
Step 3.2.1, the mises of the receiving at cutting edge position during obtaining a newest simulation loop in analog result
Equivalent stress maximum value Pn,max, wherein n indicates current total simulation loop number；
Step 3.2.2 judges " Pn,max<P0" whether true, then determine that blade shape meets method of discrimination if it is "Yes"
In criterion, i.e., the blade shape that updates after tentatively obtaining mold and being influenced by plastic deformation；If it is "No", sword is determined
Mouth-shaped is unsatisfactory for the criterion in method of discrimination；Wherein, P0Stress discrimination standard value, value logic be one between
Between mold materials yield strength and tensile strength, and close to the numerical value of mold materials yield strength.
The mold entirety stress method of discrimination, it is therefore intended that reduce press machine load and reduce energy consumption comprising following step
It is rapid:
Step 3.3.1, the mold entirety stress maximum value during obtaining a newest simulation loop in analog result
Fn,max, and count the maximum mold entirety stress F obtained in up to the present analog resultmax, wherein n indicates current total mould
Quasi- cycle-index；
Step 3.3.2 judges " Fn,max/FmaxWhether < a " is true, then determines that blade shape meets differentiation side if it is "Yes"
Criterion in method, i.e., the blade shape that preliminary acquisition mold updates after being influenced by plastic deformation；If it is "No", determine
Blade shape is unsatisfactory for the criterion in method of discrimination；Wherein, a is that the decline that mold entirety stress maximum value need to meet is up to standard
Value, value logic are that mold entirety stress maximum value need to meet with the trend that simulation loop number increases and is gradually reduced,
And this time mold entirety stress maximum value and this and before this in all simulation loops mold entirety stress maximum value ratio
The down ratio standard value of mold entirety stress maximum value need to be reached, the value range of a is 0.6~0.9.
Step 4, if blade shape meets the criterion in any of the above-described method of discrimination, determine blade shape at this time
For optimal die point shape；Otherwise using blade shape at this time as new initial mould blade shape, return step 1.It should
Optimal die point shape is repeatedly blade shape gradually stable after continuous fine is processed.
Step 5, die point abrasion is calculated, the abrasion of die point is calculated using finite element software and following wear model
Situation:
Wherein, W is abrasion loss, and K is the coefficient of waste of material, and S is mold average life span, and P is contact stress, and v is sliding
Speed, H are the Rockwell hardness of material；The calculating of die point abrasion is to be multiplied based on mold average life span with the abrasion of single fine
Result.
Certainly, if still dissatisfied for the blade shape after preceding method determines, step 6, root can be gone successively to
According to specific operating condition, the optimal die point shape of acquisition is redesigned, i.e. progress double optimization, the cutting edge of redesign
Shape, which need to meet, ensures that part processing quality, blade shape and calculated result similarity degree height, blade shape rounding off etc. are wanted
It asks.After redesigning to optimal die point shape, step 1 can return to, again pass by this method and determined.
Preferably, the simulation loop includes fine punching course and mold springback process.
Preferably, the simulation loop is to realize that the mold described in finite element software is (i.e. using finite element software
Mold component and plate to be optimized) it is set as elasticoplastic body.
Preferably, the finite element software includes Abaqus and/or Deform.Abaqus is a set of powerful
The finite element software of engineering simulation, the range solved the problems, such as are asked from relatively simple linear analysis to many non-linear of complexity
Topic.Abaqus includes abundant, analog random geometry a cell library.And possess various types of material models
Library can simulate the performance of typical project material, including metal, rubber, high molecular material, composite material, reinforced concrete
Native, compressible super-elasticity foamed material and the geological materials such as soil and rock, as general simulation tool, Abaqus in addition to
It can solve a large amount of structures (stress/displacement) problem, many problems in Other Engineering field, such as heat transfer, matter can also be simulated
Measure diffusion, crack preventing, acoustic analysis, rock-soil mechanics analysis (fluid permeability/stress coupling analysis) and piezoelectric dielectric point
Analysis.Deform is a set of processing simulation system based on finite element, for analyze metal forming and its related industries it is various at
Shape technique and heat treatment process.By simulating whole process on computers, engineer and designer are helped: design work
Tool and product process flow reduce expensive field test cost.Mold design efficiency is improved, production and material cost are reduced.
Shorten the research and development period of new product.
Compared with prior art, the beneficial effect comprise that simulating certain part process using finite element software
The stress and plastic deformation of middle die point, and determined, help differentiates optimal blade shape, with versatile, quasi-
The advantages that really property is high, at low cost, risk is small；Fine cutting edge position stress, deformation can be substantially reduced, mould invalidation is delayed；Meet
Trend of the fine industry to the requirements at the higher level for improving fine blanking die service life and reduction energy consumption damage.
Detailed description of the invention
Fig. 1 is flow chart of the invention；
Fig. 2 be without present invention determine that blade shape；
Fig. 3 be present invention determine that after obtained blade shape.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention 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.
A kind of determination method of the optimal blade shape of fine blanking die provided by the invention, is used for all kinds of common fine blanking dies
The blade shape of tool optimizes to extend die life, and this method passes through calculating fine blanking die Multi-step forming using the method for simulation
Process leads to deformation because of stress and shape gradually stable cutting edge, discrimination standard, cutting edge internal stress according to cutting edge deformation quantity
Discrimination standard and mold entirety stress 3 kinds of decision criterias, scientific algorithm goes out the optimal blade shape of mold, thus protecting
Reduce die point stress under the premise of demonstrate,proving part processing precision, promotes die life.
Specifically: fine blanking die be on active service during cutting edge stress and cause deformation include 2 aspect, first is that cutting edge occur
Plastic deformation causes blade shape to change, and causes blade shape to change second is that abrasion occurs for cutting edge.Cutting edge plasticity becomes
It is the plastic deformation accumulation that cutting edge in fine blanking die fine process is calculated based on continuous simulation, the abrasion of cutting edge that shape, which calculates,
Meter calculates the abrasion loss and fine blanking die average life span of cutting edge in fine blanking die fine process based on single simulation at last
Product.According to cutting edge deformation quantity, the discrimination standard of cutting edge internal stress and mold entirety stress, it is processed to calculate single fine
In journey or whether cutting edge deformation amount or cutting edge by internal stress or mold entirety stress are determined fine blanking die blade shape
Into stable state, i.e. cutting edge deformation quantity is negligible.It is obtained after fine blanking die cutting edge plastic deformation is superimposed with abrasion loss
Blade shape be the blade shape for being most suitable for the part.It as needed can be again artificial on the basis of optimal blade shape herein
Design.
Table 1 lists the optimal blade shape of fine blanking die in the discrimination standard of above-mentioned cutting edge deformation quantity, cutting edge internal stress
The range of discrimination standard and the threshold value under the discrimination standard of mold entirety stress.It should be noted that implementing for one
For example, threshold value is a point value being located in value range listed by table 1.
Table 1
Embodiment 1: process corresponding with above-mentioned steps is executed by finite element software ABAQUS and/or Deform software
It is controlled in the form of the above-mentioned execution to the cutting edge deformation quantity in above-mentioned table 1, detailed process is as follows.
Step 1, a simulation loop is done using fine process of the finite element software to certain part, simulation loop includes
Fine punching course and mold springback process, obtain the region that die point is plastically deformed in fine process.Sword
Mouth-shaped is as shown in Figure 2.
Step 2, cutting edge region to be analyzed is drawn a circle to approve, which should not only include cutting edge plastic deformation area, but also in cutting edge plasticity
Slightly expand on the basis of deformed region, it is accurate to determine.
Step 3, selection cutting edge deformation quantity method of discrimination determines the blade shape in cutting edge region to be analyzed.It will be described
For cutting edge region projection to be analyzed in Cartesian Coordinategrid, enabling the grid node quantity in the cutting edge region to be analyzed is 18, will
The grid node is exported from finite element software, their node serial number and coordinate is as described in Table 2:
Table 2
Step 4, the deflection D of the node i at cutting edge position in a newest simulation loop is calculated by following modelsi,1, sword
Oral area position averaged deformation amount D1And the variance of cutting edge deformation quantity
By calculating, specific data are as follows: Di,1As described in Table 3, D1=7.7 μm,；
Table 3
It selectes according to the actual situation and judges D0=0.85 μm,Differentiate " Dn<D0, and" no
It sets up, then using blade shape at this time as new initial mould blade shape, return step 1, and repeats step 1~3, so
Circulation calculates multiple precise cutting process, and constantly updates blade shape, until the blade shape updated meets discrimination standard.
After 6 simulations, the deflection D of the node i at cutting edge position in simulation loopi,6As shown in table 4, cutting edge position
Averaged deformation amount D6The variance of=0.84 μm and cutting edge deformation quantityMeet the differentiation mark of cutting edge deformation amount
Standard then determines that blade shape at this time is the optimal die point shape for being best suited for the part.
Table 4
Step 5, on the basis of being influenced rear mold cutting edge deformation by plastic deformation the 6th time, using finite element software and under
State the abrasion condition that wear model calculates die point:
Wherein, W is abrasion loss, and K is the coefficient of waste of material, and S is mold average life span, and P is contact stress, and v is sliding
Speed, H are the Rockwell hardness of material；The calculating of die point abrasion is to be multiplied based on mold average life span with the abrasion of single fine
As a result, obtaining new blade shape, as shown in Figure 3.
It, can be according to specific operating condition to optimal mold sword if still dissatisfied for the blade shape after preceding method determines
Mouth-shaped is redesigned, and the optimal blade shape of redesign, which need to meet, ensures part processing quality, blade shape and meter
Result similarity degree height, blade shape rounding off etc. is calculated to require.After being redesigned to optimal die point shape, it can return
Step 1 is returned, this method is again passed by and is determined.
Embodiment 2: process corresponding with above-mentioned steps is executed by finite element software ABAQUS and/or Deform software
It is controlled in the form of the above-mentioned execution to the cutting edge deformation quantity in above-mentioned table 1, detailed process is as follows.
Step 1, a simulation loop is done using fine process of the finite element software to certain part, simulation loop includes
Fine punching course and mold springback process, obtain the region that die point is plastically deformed in fine process.Sword
Mouth-shaped is as shown in Figure 2.
Step 2, cutting edge region to be analyzed is drawn a circle to approve, which should not only include cutting edge plastic deformation area, but also in cutting edge plasticity
Slightly expand on the basis of deformed region, it is accurate to determine.
Step 3, selection cutting edge internal stress method of discrimination determines the blade shape in cutting edge region to be analyzed.
Step 4, the mises of the receiving at cutting edge position is equivalent during obtaining a newest simulation loop in analog result
Stress maximum value P1,max, specific data are as follows: P1,max=3051.15MPa；
It selectes according to the actual situation and judges P0=2200MPa；Differentiate " P1,max<P0" invalid, then by blade shape at this time
Shape repeats step 1~3 as new initial mould blade shape, return step 1, so recycles, and calculates multiple precise cutting processing
Process, and initial mould blade shape is constantly updated, until the blade shape updated meets discrimination standard.
After 6 simulations, cutting edge internal stress P in simulation loopn,maxAs shown in table 5, cutting edge internal stress P6,max=
2177.55MPa, meets the discrimination standard of cutting edge internal stress, then determines that blade shape at this time is to be best suited for the part most
Excellent die point shape.
Table 5
Step 5, on the basis of being influenced rear mold cutting edge deformation by plastic deformation the 6th time, using finite element software and under
State the abrasion condition that wear model calculates die point:
Wherein, W is abrasion loss, and K is the coefficient of waste of material, and S is mold average life span, and P is contact stress, and v is sliding
Speed, H are the Rockwell hardness of material；The calculating of die point abrasion is to be multiplied based on mold average life span with the abrasion of single fine
As a result, obtaining new blade shape, as shown in Figure 3.
It, can be according to specific operating condition to optimal mold sword if still dissatisfied for the blade shape after preceding method determines
Mouth-shaped is redesigned, and the optimal blade shape of redesign, which need to meet, ensures part processing quality, blade shape and meter
Result similarity degree height, blade shape rounding off etc. is calculated to require.After being redesigned to optimal die point shape, it can return
Step 1 is returned, this method is again passed by and is determined.
Embodiment 3: process corresponding with above-mentioned steps is executed by finite element software ABAQUS and/or Deform software
It is controlled in the form of the above-mentioned execution to the cutting edge deformation quantity in above-mentioned table 1, detailed process is as follows.
Step 1, a simulation loop is done using fine process of the finite element software to certain part, simulation loop includes
Fine punching course and mold springback process, obtain the region that die point is plastically deformed in fine process.Sword
Mouth-shaped is as shown in Figure 2.
Step 2, cutting edge region to be analyzed is drawn a circle to approve, which should not only include cutting edge plastic deformation area, but also in cutting edge plasticity
Slightly expand on the basis of deformed region, it is accurate to determine.
Step 3, selection mold entirety stress method of discrimination determines the blade shape in cutting edge region to be analyzed.
Step 4, mold entirety stress maximum value F in a newest simulation loop is calculated by following models1,max, and count
Up to the present the maximum mold entirety stress F obtained in analog resultmax；Specific data are as follows: F1,max=636.28kN；Fmax=
636.28kN。
It selectes according to the actual situation and judges a=0.7；Differentiate " F1,max/FmaxWhether < a " is true, if invalid, by this
When blade shape as new initial mould blade shape, return step 1, and repeat step 1~3 is so recycled, is calculated more
Secondary fine process, and blade shape is constantly updated, until the blade shape updated meets discrimination standard.
After 6 simulations, mold entirety stress F in simulation loopn,maxAs shown in table 6, F1,max/Fmax=0.68, symbol
The discrimination standard for closing cutting edge deformation amount, then determine that blade shape at this time is the optimal die point shape for being best suited for the part
Shape.
Table 6
Step 5, on the basis of being influenced rear mold cutting edge deformation by plastic deformation the 6th time, using finite element software and under
State the abrasion condition that wear model calculates die point:
Wherein, W is abrasion loss, and K is the coefficient of waste of material, and S is mold average life span, and P is contact stress, and v is sliding
Speed, H are the Rockwell hardness of material；The calculating of die point abrasion is to be multiplied based on mold average life span with the abrasion of single fine
As a result, obtaining new blade shape, as shown in Figure 3.
It, can be according to specific operating condition to optimal mold sword if still dissatisfied for the blade shape after preceding method determines
Mouth-shaped is redesigned, and the optimal blade shape of redesign, which need to meet, ensures part processing quality, blade shape and meter
Result similarity degree height, blade shape rounding off etc. is calculated to require.After being redesigned to optimal die point shape, it can return
Step 1 is returned, this method is again passed by and is determined.
The above described specific embodiments of the present invention are not intended to limit the scope of the present invention..Any basis
Any other various changes and modifications that technical concept of the invention is made should be included in the guarantor of the claims in the present invention
It protects in range.
Claims (10)
1. a kind of determination method of the optimal blade shape of fine blanking die, includes the following steps:
Step 1, for the initial mould blade shape of certain part setting, 1 simulation is done to the fine process of the part and is followed
Ring obtains the region that die point is plastically deformed in fine process；
Step 2, cutting edge region to be analyzed is determined comprising the region being plastically deformed, and become to the generation plasticity
The region that the area peripheral edge of shape extends；
Step 3, following at least one method of discrimination is selected to determine the blade shape in cutting edge region to be analyzed: cutting edge deformation
Measure method of discrimination, cutting edge internal stress method of discrimination and mold entirety stress method of discrimination；
Step 4, if blade shape meets the criterion in any of the above-described method of discrimination, determine that blade shape at this time is most
Excellent die point shape；Otherwise using blade shape at this time as new initial mould blade shape, return step 1.
2. a kind of determination method of the optimal blade shape of fine blanking die according to claim 1, it is characterised in that: the mould
Quasi- circulation includes fine punching course and mold springback process.
3. a kind of determination method of the optimal blade shape of fine blanking die according to claim 1, it is characterised in that: the sword
Degree of lip-rounding variable method of discrimination includes,
Step 3.1.1 is enabled in the cutting edge region to be analyzed by the cutting edge region projection to be analyzed in Cartesian Coordinategrid
Grid node imQuantity is m, and coordinate is followed successively by i1(x1, y1, z1)、i2(x2, y2, z2)……im(xm, ym, zm)；
Step 3.1.2 successively calculates the deflection D of the node i at cutting edge position in a newest simulation loopi,n, cutting edge position it is flat
Equal deformation quantity DnAnd the variance of cutting edge deformation quantity
Wherein, n indicates current total simulation loop number；M indicates the number of nodes at the fine blanking die cutting edge position of current research；
D1,n、D2,n、…、Dm,nRespectively indicate m-th the 1st cutting edge node under n-th simulation loop, the 2nd cutting edge node ... of cutting edge
The deformation quantity of node；DnFor D1,n、D2,n、…、Dm,nMean value,For D1,n、D2,n、…、Dm,nVariance；
Step 3.1.3 judges " Dn<D0, and" whether true, then determine that blade shape meets if it is "Yes" and differentiates
Criterion in method, i.e., the blade shape that preliminary acquisition mold updates after being influenced by plastic deformation；If it is "No", sentence
Determine the criterion that blade shape is unsatisfactory in method of discrimination；Wherein, D0For the discrimination standard of cutting edge column joints deformation amount average value
Value,For the discrimination standard value of cutting edge column joints deformation amount variance.
4. a kind of determination method of the optimal blade shape of fine blanking die according to claim 1, it is characterised in that: the sword
Mouthful maximum internal stress method of discrimination includes,
Step 3.2.1, mises that cutting edge position is born during obtaining a newest simulation loop in analog result etc. effects
Power maximum value Pn,max, wherein n indicates current total simulation loop number；
Step 3.2.2 judges " Pn,max<P0" whether true, then determine that blade shape meets in method of discrimination if it is "Yes"
Criterion；If it is "No", determine that blade shape is unsatisfactory for the criterion in method of discrimination；Wherein, P0It is that stress is sentenced
Other standard value.
5. a kind of determination method of the optimal blade shape of fine blanking die according to claim 1, it is characterised in that: the mould
Having whole stress method of discrimination includes,
Step 3.3.1, the mold entirety stress maximum value F during obtaining a newest simulation loop in analog resultn,max, and
Count the maximum mold entirety stress F obtained in up to the present analog resultmax, wherein n indicates current total simulation loop
Number；
Step 3.3.2 judges " Fn,max/FmaxWhether < a " is true, then determines that blade shape meets in method of discrimination if it is "Yes"
Criterion；If it is "No", determine that blade shape is unsatisfactory for the criterion in method of discrimination；Wherein, a is that mold is whole
The decline value up to standard that body stress maximum value need to meet.
6. a kind of determination method of the optimal blade shape of fine blanking die according to claim 1, it is characterised in that: further include
Step 5 after the step 4, calculates die point abrasion, calculates mould using finite element software and following wear model
Have the abrasion condition of cutting edge:
Wherein, W is abrasion loss, and K is the coefficient of waste of material, and S is mold average life span, and P is contact stress, and v is sliding speed,
H is the Rockwell hardness of material.
7. a kind of determination method of the optimal blade shape of fine blanking die according to claim 6, it is characterised in that: further include
Step 6 after the step 5 redesigns the optimal die point shape of acquisition.
8. a kind of determination method of the optimal blade shape of fine blanking die according to claim 7, it is characterised in that: to optimal
After die point shape is redesigned, return step 1.
9. a kind of determination method of the optimal blade shape of fine blanking die according to claim 1, it is characterised in that: the mould
Quasi- circulation is realized using finite element software, and the mold described in finite element software is set as elasticoplastic body.
10. a kind of determination method of the optimal blade shape of fine blanking die according to claim 9, it is characterised in that: described
Finite element software includes Abaqus and/or Deform.
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| CN112207292A (en) * | 2020-09-30 | 2021-01-12 | 上海交通大学 | Diamond cutter cutting edge optimization implementation method for removing edge burrs |
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