CN107092745A - A kind of window lifting plate forming technology optimization method based on variance analysis - Google Patents
A kind of window lifting plate forming technology optimization method based on variance analysis Download PDFInfo
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- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract
The invention discloses a kind of window lifting plate forming technology optimization method based on variance analysis, including determine optimization aim and optimized variable, set up FEM model, repeat the step of orthogonal test is with variance analysis method acquisition best fit the factor of resilience four combination of process parameters；The present invention results in the primary and secondary order of influence window lifting plate springback factor by repeating Orthogonal Experiment and Design and method of analysis of variance：B2＞ D3＞ C2＞ A1, obtain optimized variable sheet thickness A, drawing velocity B, friction factor C and die clearance D best fit, the technological parameter after shaping after optimization：Sheet thickness A=0.9mm, B=5000mm/s, C=0.125, D=1.15, the effectively primary and secondary order of analysis part forming technological parameter, and good optimization forming parameters, reduces part defect, theoretical foundation is provided for actual production, reduction repairs a die, die trial number of times, improves part quality.
Description
Technical field
The invention belongs to SGCC plate complicated bend forming technologies field, more particularly to a kind of vehicle window based on variance analysis
Lifter plate forming technology optimization method.
Background technology
With automobile in life, the rapid popularization of production field with updating, window lifting plate is used as regulation automotive window
The quality of key activities part, its assembly performance and performance directly determines the stationarity and smoothness of vehicle window activity, together
When also largely influence people experience sense by.Due to window lifting plate structure relative to other large-scale coverings and
For structural member, with the characteristics of complex-shaped, Curvature varying is big, component assembly size requires high, cause in actual production
In journey in order to obtain the excellent part of quality, it is necessary to as much as possible reduce part resilience, it is to avoid cause under parts size precision
Drop.
At this stage, in order to reduce the springback capacity after part forming, product quality is improved, conventional solution is in design
After the design that initial formation process program is completed under the guidance of experience and reference books, Making mold and trial production are carried out, will be tried
The part that production is obtained is assembled and detected, judges the assembly performance and quality of part, whole process centre is unpredictable can
The defect and deficiency that can exist, the dependence to designer's experience are larger.Once occurring that springback capacity is excessive, assembly precision is low or zero
During the problems such as part reduction is higher, it is necessary to redesign, improve original process parameter, and correspondence changes the size ginseng of shaping dies
Number, repeats and is produced as a trial, assembled and detected.Whole Process planning flow cycle length, efficiency are low, time and materials cost
Height, it is difficult to meet current social to quick, high efficiency manufacture pursuit.
The content of the invention
The technical problem to be solved in the present invention is：A kind of window lifting plate forming technology optimization based on variance analysis is provided
Method, can predict defect and deficiency that complicated bend part is present, reduce to designer according to lazyness, whole Process planning flow
Cycle is short, the reduction of efficiency high, time and materials cost, quick, high efficiency manufacture is realized, to solve present in above-mentioned prior art
Problem.
The technical scheme that the present invention takes is：A kind of window lifting plate forming technology optimization method based on variance analysis,
This method comprises the following steps：
(1) optimization aim and optimized variable are determined：It is maximum using the maximum displacement before and after part forming as optimization aim
Displacement is less than 0.7mm；Optimized variable is sheet thickness A, drawing velocity B, friction factor C and die clearance D；
(2) FEM model is set up：Created according to the detail drawing of window lifting plate complicated bend part under UG NX systems
The threedimensional model of part, and ask difference to obtain the threedimensional model of upper die and lower die using boolean, export .igs forms are preserved, by .igs
File imports dynaform softwares and carries out sheet forming setting；
(3) springback factor includes sheet thickness A, drawing velocity B, friction factor C and die clearance D, designs four factors three
The orthogonal test of level, carries out secondary checking, number of repetition S=3, and obtain using method of analysis of variance by repeating orthogonal test
The best fit of four factors.
It is preferred that, sheet forming sets selection without flanging shaping in above-mentioned steps (2), defines plate, lower mould and upper mould, base
FEM model is created in lower mould, material is low-carbon cold rolling hot-dip galvanized steel sheet, and the trade mark is SGCC, correspondence Dynaform software materials
Expect medium SGC340 (36) material under the Japan standards of storehouse, need to be particularly defined as No. 16 four points when setting sheet properties
Unit.
Beneficial effects of the present invention：Compared with prior art, effect of the present invention is as follows：
(1) present invention can aid in carrying out a variety of forming parameters designs and group by repeating orthogonal experiment design method
Close, the test data of design be subjected to analog simulation under CAE analysis platform with reference to numerical simulation technology, prediction it is corresponding into
Under shape technological parameter, window lifting plate quality problems that may be present, such as whether occurring rupture, corrugation, springback capacity size and zero
The multiple evaluation indexes such as part plate reduction, carry out the design of parameter for designer and modification provide certain guidance, this repetition
Orthogonal experiment design method is mainly used to predict the resilience defect of part；To the part forming technological parameter under experimental design and return
Bullet amount carries out variance analysis, passes through the analysis result of parameters, it can be determined that differing formed technological parameter influences on springback capacity
Primary and secondary degree, and recommend one group of optimal forming parameters so that part springback capacity is minimum, product quality is best.And
Further shorten the construction cycle of product, reduce production cost.
(2) present invention can realize whole work by repeating orthogonal test and variance analysis method and finite element modelling
The skill design cycle cycle shortens, design efficiency is higher, the reduction of time and materials cost, and reduction repairs a die, die trial number of times, realizes fast
Speed, high efficiency manufacture；
(3) by repeating Orthogonal Experiment and Design and extremum difference analysis, influence window lifting plate springback factor is resulted in
Primary and secondary order：B2＞ D3＞ C2＞ A1, obtain optimized variable sheet thickness A, drawing velocity B, friction factor C and die clearance D
Best fit, the technological parameter after shaping after optimization：Sheet thickness A=0.9mm, B=5000mm/s, C=0.125, D=
1.15；
(4) according to the use requirement and material property of window lifting plate, part reduction is not higher than 25%.Through adjusting, most
Small thickness is tmin=0.675mm, understands according to predicting the outcome, and the minimum thickness under the technological parameter is t=0.72mm, greatly
In minimum thickness, the use and matching requirements of part are met；
(5) numerical simulation is carried out to above-mentioned technological parameter under Dynaform platforms, predicts part resilience.As a result zero is shown
The maximum displacement that part is produced is 0.60mm, less than maximum displacement 0.7mm, meets the use and matching requirements of part；
(6) part forming technological parameter can effectively be analyzed by being combined by repetition orthogonal test with variance analysis method
Primary and secondary order, and good optimization forming parameters, reduce part defect, theoretical foundation are provided for actual production.
Brief description of the drawings
Fig. 1 is window lifting plate complicated bend part threedimensional model；
Fig. 2 is FEM model；
Fig. 3 is the window lifting plate springback Prediction under forming parameters；
Fig. 4 is the thickness prediction of vehicle window lifter plate under forming parameters.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described further specific embodiment.
Embodiment：As Figure 1-Figure 4, a kind of window lifting plate forming technology optimization method based on variance analysis, should
Method comprises the following steps：
(1) optimization aim and optimized variable are determined：Because research object is that Complex Different Shape bends stamping parts, to ensure the later stage
Overall assembly precision, using the maximum displacement before and after part forming as optimization aim, maximum displacement is less than 0.7mm
Assembling use condition is met, non-selected part different cross section angle of bend variable quantity (△ θ) is because the part as optimization aim
Mainly consider overall dimensions in assembling process, feature dimensions are little to the influence degree of assembly precision；Optimized variable is that plate is thick
Spend A, drawing velocity B, friction factor C and die clearance D；
The forming parameters table of table 1
| Optimized variable | Sheet thickness/mm | Drawing velocity/(ms-1) | Friction factor | Die clearance |
| Code name | A | B | C | D |
Note：The width that especially clear and definite die clearance D is not actual gap is needed, but with respect to the multiplying power of sheet thickness.
(2) FEM model is set up：Created according to the detail drawing of window lifting plate complicated bend part under UG NX systems
The threedimensional model of part, as shown in figure 1, and asking the poor threedimensional model for obtaining upper die and lower die, export .igs forms using boolean
Preserve .igs files are imported into dynaform softwares carries out sheet forming setting；
Sheet forming sets selection without flanging shaping, can reduce the manufacture difficulty of mould, simplify mould structure, define plate
Material, lower mould and upper mould, FEM model is created based on lower mould, as shown in Fig. 2 because window lifting plate is non-stress-carrying part, to material
Expect that performance requirement is relatively low, material is low-carbon cold rolling hot-dip galvanized steel sheet, and the trade mark is SGCC, correspondence Dynaform soft materials storehouse
Medium SGC340 (36) material under Japan standards, because the purpose of numerical simulation is the resilience defect of prediction part, if
Need to be particularly defined as No. 16 four dot product subdivisions when putting sheet properties；
(3) springback factor includes sheet thickness A, drawing velocity B, friction factor C and die clearance D, designs four factors three
The orthogonal test of level, orthogonal arrage gauge outfit is L9 (34), and as shown in table 2, no sky is arranged factor level table, by the design experiment side of table 2
Case,
The factor level table of table 2
Repeat Orthogonal Experiment and Design and variance analysis：In order to prevent the contingency of single test result, intend by repeating just
Experiment is handed over to carry out secondary checking, number of repetition S=3, test index result is as shown in table 3.
Table 3 repeats orthogonal experiments statistics
| Level | S1 | S2 | S3 |
| 1 | 1.60 | 1.64 | 0.70 |
| 2 | 1.26 | 0.61 | 0.55 |
| 3 | 1.07 | 0.86 | 0.86 |
| 4 | 1.03 | 0.99 | 1.53 |
| 5 | 0.91 | 0.88 | 0.92 |
| 6 | 1.00 | 1.00 | 0.99 |
| 7 | 1.30 | 1.45 | 1.45 |
| 8 | 0.80 | 0.82 | 0.67 |
| 9 | 0.99 | 0.83 | 1.25 |
Ki is that " S test data sum " is calculated under being tested with each number, and Correlation method for data processing the results are shown in Table 4.
Table 4 repeats experimental data processing
| Factor | A | B | C | C |
| K1 | 9.15 | 11.69 | 9.22 | 9.72 |
| K2 | 9.25 | 7.42 | 9.04 | 9.61 |
| K3 | 9.56 | 8.85 | 9.7 | 8.63 |
The related data of variance analysis is obtained by calculating, because each row of orthogonal arrage have all been booked factor and are arranged without sky,
Therefore by empty row error e1With the replacement that four factor large deviations quadratic sums are minimum, while regarding its free degree as e1The free degree, such as
Shown in table 5.
The extreme difference operational analysis table of the window lifting plate resilience experimental result of table 5
Pass through variance analysis, it can be deduced that four factors are B to the primary and secondary order of window lifting plate springback influence>D>C>A, it is excellent
Combination of process parameters after change is B2D3C2A1。
Forming parameters after the optimization of table 6
| Process program | A | B | C | D | Test index |
| Parameter | 0.9 | 5000 | 0.125 | 1.15 | 0.60 |
Interpretation of result
(1) master of window lifting plate springback factor is influenceed by repeating Orthogonal Experiment and Design and secondary obtain of method of analysis of variance
Secondary order：B2＞ D3＞ C2＞ A1；
(2) technological parameter after shaping after optimizing：Sheet thickness A=0.9mm, B=5000mm/s, C=0.125, D=
1.15；
(3) according to the use requirement and material property of window lifting plate, part reduction is not higher than 25%.Through adjusting, material
Material minimum thickness is tmin=0.675mm.Understood according to predicting the outcome, the minimum thickness under the technological parameter is t=
0.72mm, more than minimum thickness；
(4) numerical simulation is carried out to above-mentioned technological parameter under Dynaform platforms, predicts part resilience.As a result zero is shown
The maximum displacement that part is produced is 0.60mm, less than maximum displacement 0.7mm, meets the use and matching requirements of part；
(5) part forming technological parameter can effectively be analyzed by demonstrating repetition orthogonal test and being combined with variance analysis method
Primary and secondary order, and good optimization forming parameters reduce part defect, theoretical foundation are provided for actual production；
(6) apply and repeat orthogonal test and method of analysis of variance design experiment model and analyze different factors to part resilience shadow
Loud conspicuousness, determines that it influences the primary and secondary of part resilience order, and optimizes the forming parameters of plate, is the reality of enterprise
Production provides reference frame with manufacture, and reduction repairs a die, die trial number of times, improves part quality.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (2)
1. a kind of window lifting plate forming technology optimization method based on variance analysis, it is characterised in that：This method includes following
Step：
(1) optimization aim and optimized variable are determined：It regard the maximum displacement before and after part forming as optimization aim, maximum displacement
Amount is less than 0.7mm；Optimized variable is sheet thickness A, drawing velocity B, friction factor C and die clearance D；
(2) FEM model is set up：Part is created under UG NX systems according to the detail drawing of window lifting plate complicated bend part
Threedimensional model, and ask difference to obtain the threedimensional model of upper die and lower die using boolean, export .igs forms are preserved, by .igs files
Import dynaform softwares and carry out sheet forming setting；
(3) springback factor includes sheet thickness A, drawing velocity B, friction factor C and die clearance D, designs the level of four factor three
Orthogonal test, carry out secondary checking by repeating orthogonal test, number of repetition S=3, and using method of analysis of variance obtain four because
The best fit of element.
2. a kind of window lifting plate forming technology optimization method based on variance analysis according to claim 1, its feature
It is：Sheet forming sets selection without flanging shaping in step (2), defines plate, lower mould and upper mould, creates limited based on lower mould
Meta-model, material is low-carbon cold rolling hot-dip galvanized steel sheet, and the trade mark is SGCC, correspondence Dynaform soft materials storehouse Japan standards
Lower medium SGC340 (36) material, needs to be particularly defined as No. 16 four dot product subdivisions when setting sheet properties.
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Cited By (3)
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| CN109871605A (en) * | 2019-02-12 | 2019-06-11 | 中车长春轨道客车股份有限公司 | Bending and forming method, system, device and medium |
| CN113757986A (en) * | 2021-08-20 | 2021-12-07 | Tcl空调器(中山)有限公司 | Handle forming method, air conditioner outdoor unit and air conditioner |
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| CN105183932A (en) * | 2015-07-15 | 2015-12-23 | 湖南大捷智能装备有限公司 | Stamping computer simulation calculating method with consideration of mold deformation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107742048A (en) * | 2017-11-10 | 2018-02-27 | 贵州大学 | A kind of re-optimization method of overvoltage protector gold thread skew technological parameter |
| CN109871605A (en) * | 2019-02-12 | 2019-06-11 | 中车长春轨道客车股份有限公司 | Bending and forming method, system, device and medium |
| CN113757986A (en) * | 2021-08-20 | 2021-12-07 | Tcl空调器(中山)有限公司 | Handle forming method, air conditioner outdoor unit and air conditioner |
| CN113757986B (en) * | 2021-08-20 | 2022-12-13 | Tcl空调器(中山)有限公司 | Handle forming method, air conditioner outdoor unit and air conditioner |
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Application publication date: 20170825 |