CN109635364A - A kind of springback capacity evaluation method based on control errors function - Google Patents
A kind of springback capacity evaluation method based on control errors function Download PDFInfo
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- CN109635364A CN109635364A CN201811396452.0A CN201811396452A CN109635364A CN 109635364 A CN109635364 A CN 109635364A CN 201811396452 A CN201811396452 A CN 201811396452A CN 109635364 A CN109635364 A CN 109635364A
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- springback
- springback capacity
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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]
Abstract
A kind of springback capacity evaluation method based on control errors function, belongs to material molding control field.The springback capacity for solving the problems, such as that general analytic method can not generate high-strength steel sheet in punching press is accurately estimated.A kind of springback capacity evaluation method based on control errors function, high-strength steel plate stamping and forming process is simulated using numerical simulation method, initially set up the finite element model of the U-shaped part of high-strength steel sheet, it is then based on the spring-back research error function that displacement transfer function method establishes U-shaped part, springback compensation is carried out by the springback compensation module of finite element numerical simulation software again, the actual parts springback angle predicted by compensated mold is set to match with the standard springback angle being calculated by error function, to realize the accurate estimation to high-strength steel sheet punching press springback capacity.The present invention is suitable for the estimation of the U-shaped part springback capacity of high strength steel.
Description
Technical field
The present invention relates to a kind of U-shaped part springback capacity evaluation methods of high strength steel.
Background technique
Automobile manufacture is in the industrial in occupation of high specific gravity of entire country.In recent years, high strength steel is as a kind of than strong
Degree is high, highly reliable, accurate in size raw material in automobile manufacture using more and more extensive, and the following rebound is asked
Can topic be also on the rise, accurately estimation is imposed to the rebound generated in punching course and effective inhibition is directly covered with automobile
The forming quality of cover piece is related to dimensional accuracy.Currently, the rebound problem of high strength steel oneself become international problem.
Since how more complex the geometry and boundary condition of automobile panel itself be, general analytic method loses at this moment
It goes to act on, and after finite element numerical simulation technology is introduced sheet metal forming field, General Analytical method and empirical formula method
Deficiency is overcome.High-strength steel plate stamping and forming process is simulated using numerical simulation method, anticipated that
Flow tendency, Stress distribution, plate thickness variation and the defect being likely to occur of material etc., liquidate for Accurate Prediction forming parameter
The influence of casting die forming quality, and then Optimizing Process Parameters and mould structure provide a kind of effective means.
Finite element numerical simulation technology is developed so far, and can make standard to the defects of rupture and corrugation in sheet forming
True prediction and estimation, but for rebound, precision is still unsatisfactory (≤75%).
So this method by functional based method in conjunction with finite element numerical simulation technology, by displacement transfer function and limited
The springback compensation function of first numerical simulation software provides a kind of evaluation method of U-shaped part springback capacity of high strength steel.
Summary of the invention
Present invention aim to address the springback capacities that general analytic method can not generate high-strength steel sheet in punching press
The problem of accurately being estimated, and a kind of springback capacity evaluation method based on control errors function proposed.
A kind of springback capacity evaluation method based on control errors function, the estimation of springback capacity can be realized by following steps:
Step 1: part, blank and mold former are established using 3D graphics software, and is imported in numerical simulation software；
Step 2: carrying out grid dividing to the model of importing, completes position adjustment and positioning between each mold and blank；
Step 3: it using Webb displacement transfer function as thought, establishes spring-back research error and simulates the transmitting letter between springback capacity
Number, and it is defined as spring-back research error function；
Step 4: in numerical simulation software, the model of standard stamping parts, spring-back research type face and practical stamping parts is successively imported
File measures the nodal distance between spring-back research type face and standard component, between spring-back research type face and practical stamping parts respectively, and will
This numerical value is brought into the expression formula of simulation error function and calculates simulation error functional value；
Step 5: springback compensation is carried out to mold using numerical simulation software；
Step 6: adjusting the size of compensation factor, repeats to spring back compensation process, when the practical punching press for predicting to obtain by transmission function
The springback angle θ ' of part and standard component springback angle θ (θ=90 °) terminates when coincideing, and springback capacity at this time can be used as actual resilience amount
One accurate estimation.
Wherein, springback compensation process can be divided into following three step:
All compensation, other parameters remain unchanged for selection, click submitting button and submit task；
Stamping finite element numerical simulation is re-started with compensated mold, and the result after simulation is returned again
Bullet calculates；
Result after calculating is compared with standard component, if coincideing, using the springback capacity that is calculated as part springback capacity
Estimated value, otherwise adjust compensation factor (its value should be greater than 1.0).
Beneficial effects of the present invention are that the present invention provides a kind of springback capacity evaluation methods based on control errors function.Closely
Nian Lai, high strength steel is high as a kind of specific strength, and highly reliable, accurate in size automobile panel raw material are in automobile manufacture
Using more and more extensive, however the punching press of high strength steel rebound problem but hampers the development of auto industry.Currently, due to vapour
How more complex the geometry and boundary condition of vehicle covering itself be, and general analytic method can not be to high strength steel in punching press
Springback capacity in journey, which provides, accurately to be estimated, though and finite element numerical simulation technology can be to high strength steel in punching course
In rebound carry out analogue simulation, but its accuracy is still in one lower horizontal (≤75%).This method is by functional based method
In conjunction with finite element numerical simulation technology, by the springback compensation function of displacement transfer function and finite element numerical simulation software,
A kind of evaluation method of U-shaped part springback capacity of high strength steel is provided, it is intended to the advantages of integrating traditional analytic method and numerical simulation technology,
Accomplish accurately estimating to springback capacity.
Detailed description of the invention
Fig. 1 is the definition of standard springback angle θ.
Specific embodiment
Specific embodiment 1: the U-shaped part springback capacity based on control errors function and numerical simulation of present embodiment is estimated
The estimation of calculation method, springback capacity can be realized by following steps:
Step 1: part, blank and mold former are established using 3D graphics software, and is imported in numerical simulation software；
Step 2: carrying out grid dividing to the model of importing, completes position adjustment and positioning between each mold and blank；
Step 3: it using Webb displacement transfer function as thought, establishes spring-back research error and simulates the transmitting letter between springback capacity
Number, and it is defined as spring-back research error function；
Step 4: in numerical simulation software, the model of standard stamping parts, spring-back research type face and practical stamping parts is successively imported
File measures the nodal distance between spring-back research type face and standard component, between spring-back research type face and practical stamping parts respectively, and will
This numerical value is brought into the expression formula of simulation error function and calculates simulation error functional value；
Step 5: springback compensation is carried out to mold using numerical simulation software；
Step 6: adjusting the size of compensation factor, repeats to spring back compensation process, when the practical punching press for predicting to obtain by transmission function
The springback angle θ ' of part and standard component springback angle θ (θ=90 °) terminates when coincideing, and springback capacity at this time can be used as actual resilience amount
One accurate estimation.
Wherein, springback compensation process can be divided into following three step:
All compensation, other parameters remain unchanged for selection, click submitting button and submit task；It is re-started with compensated mold
Stamping finite element numerical simulation, and the result after simulation is carried out springback calculation again；
Result after calculating is compared with standard component, if coincideing, using the springback capacity that is calculated as part springback capacity
Estimated value, otherwise adjust compensation factor (its value should be greater than 1.0).
Specific embodiment 2: unlike specific embodiment one, present embodiment based on control errors function
With the U-shaped part springback capacity evaluation method of numerical simulation, simulation error function representation described in step 3 are as follows:
Wherein,
xs=ys, it is spring-back research type face；
xpRear profile face is sprung back for practical stamping parts；
ymFor die face.
Specific embodiment 3: unlike specific embodiment one, present embodiment based on control errors function
With the U-shaped part springback capacity evaluation method of numerical simulation, springback compensation process described in step 8 are as follows:
All compensation, other parameters remain unchanged for selection, click submitting button and submit task；
Stamping finite element numerical simulation is re-started with compensated mold, and the result after simulation is returned again
Bullet calculates；
Result after calculating is compared with standard component, if coincideing, using the springback capacity that is calculated as part springback capacity
Estimated value, otherwise adjust compensation factor (its value should be greater than 1.0).
Specific embodiment 4: unlike specific embodiment three, the standard springback angle θ, which is characterized in that mark
Definition such as Fig. 1 of quasi- springback angle θ.
Specific embodiment 5: unlike specific embodiment four, present embodiment based on control errors function
With the U-shaped part springback capacity evaluation method of numerical simulation, compensation factor should be greater than 1.0.
Claims (3)
1. a kind of springback capacity evaluation method based on control errors function, which is characterized in that the estimation of the size of springback capacity can be by
Following steps are realized:
Step 1: part, blank and mold former are established using 3D graphics software, and is imported in numerical simulation software；
Step 2: carrying out grid dividing to the model of importing, completes position adjustment and positioning between each mold and blank；
Step 3: it using Webb displacement transfer function as thought, establishes spring-back research error and simulates the transmitting letter between springback capacity
Number, and it is defined as spring-back research error function；
Step 4: in numerical simulation software, the model of standard stamping parts, spring-back research type face and practical stamping parts is successively imported
File measures the nodal distance between spring-back research type face and standard component, between spring-back research type face and practical stamping parts respectively, and will
This numerical value is brought into the expression formula of simulation error function and calculates simulation error functional value；
Step 5: springback compensation is carried out to mold using numerical simulation software；
Step 6: adjusting the size of compensation factor, repeats to spring back compensation process, when the practical punching press for predicting to obtain by transmission function
The springback angle θ ' of part and standard component springback angle θ (θ=90 °) terminates when coincideing, and springback capacity at this time can be used as actual resilience amount
One accurate estimation.
2. a kind of springback capacity evaluation method based on control errors function according to claim 1, which is characterized in that step 3
The simulation error function representation are as follows:
Wherein,
xs=ys, it is spring-back research type face；
xpRear profile face is sprung back for practical stamping parts；
ymFor die face.
3. a kind of springback capacity evaluation method based on control errors function according to claim 1, which is characterized in that step 5
The springback compensation process are as follows:
All compensation, other parameters remain unchanged for selection, click submitting button and submit task；
Stamping finite element numerical simulation is re-started with compensated mold, and the result after simulation is returned again
Bullet calculates；
Result after calculating is compared with standard component, if coincideing, using the springback capacity that is calculated as part springback capacity
Estimated value, otherwise adjust compensation factor (its value should be greater than 1.0).
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| CN112231892A (en) * | 2020-09-09 | 2021-01-15 | 包头钢铁（集团）有限责任公司 | Qualitative and quantitative analysis method for comprehensively evaluating reliability of stamping simulation result |
| CN112453160A (en) * | 2020-11-24 | 2021-03-09 | 李方 | Metal plate stamping correction method |
| CN113221398A (en) * | 2021-03-31 | 2021-08-06 | 成都飞机工业（集团）有限责任公司 | Method for predicting L-shaped composite material part curing deformation rebound angle |
| CN117648825A (en) * | 2024-01-25 | 2024-03-05 | 天津世亚模具股份有限公司 | High-strength plate rebound quantity estimation method |
| CN117648825B (en) * | 2024-01-25 | 2024-05-03 | 天津世亚模具股份有限公司 | High-strength plate rebound quantity estimation method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112231892A (en) * | 2020-09-09 | 2021-01-15 | 包头钢铁（集团）有限责任公司 | Qualitative and quantitative analysis method for comprehensively evaluating reliability of stamping simulation result |
| CN112231892B (en) * | 2020-09-09 | 2022-11-18 | 包头钢铁（集团）有限责任公司 | Qualitative and quantitative analysis method for comprehensively evaluating reliability of stamping simulation result |
| CN112453160A (en) * | 2020-11-24 | 2021-03-09 | 李方 | Metal plate stamping correction method |
| CN113221398A (en) * | 2021-03-31 | 2021-08-06 | 成都飞机工业（集团）有限责任公司 | Method for predicting L-shaped composite material part curing deformation rebound angle |
| CN117648825A (en) * | 2024-01-25 | 2024-03-05 | 天津世亚模具股份有限公司 | High-strength plate rebound quantity estimation method |
| CN117648825B (en) * | 2024-01-25 | 2024-05-03 | 天津世亚模具股份有限公司 | High-strength plate rebound quantity estimation method |
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Application publication date: 20190416 |