CN114154240A - Front cover coating overturning deformation prediction method and device and storage medium - Google Patents
Front cover coating overturning deformation prediction method and device and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000000576 coating method Methods 0.000 title claims abstract description 38
- 239000011248 coating agent Substances 0.000 title claims abstract description 37
- 238000003860 storage Methods 0.000 title claims abstract description 9
- 238000001962 electrophoresis Methods 0.000 claims abstract description 50
- 238000004458 analytical method Methods 0.000 claims abstract description 45
- 230000008569 process Effects 0.000 claims abstract description 39
- 238000004088 simulation Methods 0.000 claims abstract description 26
- 230000004044 response Effects 0.000 claims abstract description 20
- 238000013461 design Methods 0.000 claims abstract description 19
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 16
- 238000011161 development Methods 0.000 claims abstract description 12
- 230000007306 turnover Effects 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 238000012357 Gap analysis Methods 0.000 claims description 5
- 238000011156 evaluation Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
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- 230000008859 change Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009957 hemming Methods 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
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- 238000001179 sorption measurement Methods 0.000 description 1
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- G—PHYSICS
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- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
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- G06F30/00—Computer-aided design [CAD]
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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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- G06F2111/00—Details relating to CAD techniques
- G06F2111/04—Constraint-based CAD
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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Abstract
The invention discloses a method and a device for predicting the coating turnover deformation of a front cover and a storage medium, and the method comprises the following steps: s1, collecting front cover part information, coating electrophoresis process parameters and tool supporting and positioning parameters in a design and development stage; s2, establishing a simulation analysis model based on the front cover part information, and adjusting the plane of the front cover in the simulation analysis model to be vertical to the electrophoretic fluid flowing direction; s3, applying load and constraint to the simulation analysis model based on the coating electrophoresis process parameters and the tool supporting and positioning parameters, and calculating to obtain the deformation response of the front cover; and S4, determining a clearance analysis value between the front cover inner plate and the front cover outer plate of the front cover gluing area according to the deformation response of the front cover, comparing the clearance analysis value with a clearance set value, and evaluating the deformation degree of the front cover in the electrophoresis process. The deformation degree of the front cover in the electrophoresis process can be accurately predicted in the design and development stage, and design change in the later stage is avoided.
Description
Technical Field
The invention relates to the technical field of vehicle body electrophoresis, in particular to a method and a device for predicting front cover coating overturning deformation and a storage medium.
Background
It is known that sheet metal parts on automobiles are painted to prevent rust during use, and are first subjected to electrophoresis before painting to obtain good adhesion and adsorption stability for subsequent painting. In the past, the electrophoresis mostly adopts a double-pendulum chain rotating process, namely, a car body repeatedly swings and moves forwards in an electrophoresis cell at an angle of 30 degrees or 45 degrees, the mode is easy for coating process line building, but the electrophoresis efficiency is low, and the electrophoresis quality is slightly poor.
Therefore, an RO-DIP process is adopted by more and more vehicle types, namely, the vehicle body rotates and advances in the electrophoresis cell in a circular mode, the mode is high in efficiency, and meanwhile, better electrophoresis quality can be obtained. However, this process also has a drawback that, in the electrophoresis process, since the front cover is opened at a certain angle and supported and fixed by the tool, when the front cover rotates and moves forward along with the vehicle body in the swimming pool, the whole front cover will be subjected to a great fluid resistance, and especially, the deformation capability of the front cover structure against the resistance is significantly worse under the design ideas of large size, high collision level, light weight and the like. Under this condition, the gluey groove clearance volume between front shroud inner panel and the front shroud planking can be greater than former design value under this resistance effect, causes the bonding hardening effect of follow-up viscose relatively poor, can break away from between front shroud inner panel and the front shroud planking, and what follow is that the panel beating warp and hollowing sound, has seriously influenced product quality.
In view of the above problems, on the one hand, an effective analysis and correction means is not available at present, and on the other hand, the occurrence of the problem means that a design change is necessary, and the cost of the design change is huge when design data of parts is frozen in a production stage of a sample car. Therefore, there is a need to develop a method for analyzing such problems during the project design phase.
Disclosure of Invention
The invention aims to provide a method and a device for predicting the coating overturning deformation of a front cover and a storage medium, which can accurately predict the deformation degree of the front cover in the electrophoresis process in the design and development stage and avoid the design change in the later stage.
The invention relates to a method for predicting the coating turnover deformation of a front cover, which comprises the following steps:
s1, collecting front cover part information, coating electrophoresis process parameters and tool supporting and positioning parameters in a design and development stage;
s2, establishing a simulation analysis model based on the front cover part information, and adjusting the plane of the front cover in the simulation analysis model to be vertical to the electrophoretic fluid flowing direction;
s3, applying load and constraint to the simulation analysis model based on the coating electrophoresis process parameters and the tool supporting and positioning parameters, and calculating to obtain the deformation response of the front cover;
and S4, determining a clearance analysis value between the front cover inner plate and the front cover outer plate of the front cover gluing area according to the deformation response of the front cover, comparing the clearance analysis value with a clearance set value, and evaluating the deformation degree of the front cover in the electrophoresis process.
Further, the part information in S1 includes part material and thickness information, welding spot welding information, hemming die pressure, friction coefficient of the hemming area of the front cover inner plate and the front cover outer plate, and front cover curved surface area.
Further, the coating electrophoresis process parameters in S1 include the density and flow rate of the electrophoresis liquid.
Further, the tool supporting and positioning parameters in S1 include positioning hole information, tool size data, and tool constraint modes on the front cover and the vehicle body.
Further, the S2 specifically includes: modeling each part of the front cover in ABAQUS software, including material and thickness definition, welding points and bolt connection, then establishing a wrapping model and packing the edge welding according to the actual state, then rotating the front cover model in place according to the actual tool supporting state, and then adjusting the plane of the front cover to be vertical to the flowing direction of the electrophoretic fluid.
Further, the processing mode of the edge covering model is as follows: the periphery of the outer plate of the front cover is folded and buckled with the inner plate of the front cover through the CONTACT function of ABAQUS software, and the friction coefficient between the inner plate of the front cover and the outer plate of the front cover is set, so that the edge covering model is consistent with a real object.
Further, the S3 specifically includes: calculating according to coating electrophoresis process parameters to obtain resistance borne by a front cover in a simulation analysis model, applying the resistance to a front cover inner plate and a front cover outer plate, constraining positioning holes in the front cover and a vehicle body according to tool supporting and positioning parameters, and calculating through a nonlinear algorithm in ABAQUS software to obtain deformation response of the front cover.
Further, if the evaluation result in the step S4 is that the deformation degree of the front cover in the electrophoresis process is large, the key factors are optimized and verified through tests; the key factors comprise the structure and thickness of the inner plate, the thickness of the outer plate, tool supporting and positioning parameters, the edge-covering friction coefficient and edge-covering welding process parameters.
A front cover coating overturn deformation prediction device comprises: the information acquisition module is used for acquiring front cover part information, coating electrophoresis process parameters and tool supporting and positioning parameters in a design and development stage; the finite element modeling module is used for carrying out finite element modeling according to the front cover part information so as to generate a simulation analysis model of the front cover; the simulation analysis module is used for applying load and constraint to the simulation analysis model, calculating to obtain the deformation response of the front cover, and determining the analysis value of the gap amount between the front cover inner plate and the front cover outer plate of the front cover gluing area according to the deformation response of the front cover; and the deformation prediction module is used for comparing the gap analysis value with the gap set value and evaluating the deformation degree of the front cover in the electrophoresis process.
A storage medium having stored thereon a front cover paint rollover deformation prediction program that, when executed by a processor, implements the front cover paint rollover deformation prediction method described above.
According to the invention, a simulation analysis model is established according to the information of the front cover parts, and the plane of the front cover in the simulation analysis model is adjusted to be vertical to the flowing direction of the electrophoretic fluid, so that the resistance of the front cover in the state reaches the maximum. And then, applying load and constraint to the simulation analysis model based on the coating electrophoresis process parameters and the tool supporting and positioning parameters, and calculating to obtain the deformation response of the front cover. And determining a clearance analysis value between the front cover inner plate and the front cover outer plate of the front cover gluing area according to the deformation response of the front cover, comparing the clearance analysis value with a clearance set value, and evaluating the deformation degree of the front cover in the electrophoresis process. And then realized the accurate prediction to the deformation degree of front shroud at the electrophoresis in the design development stage, realized promptly in the project development earlier stage the purpose of controlling the deformation risk, effectively avoided the later stage to take place the design change temporarily. And if the evaluation result is that the deformation degree of the front cover in the electrophoresis process is large, the problem of large deformation degree can be solved through key factor optimization, the risk of deformation in a later-stage electrophoresis picture is reduced, the later-stage rectification cost is reduced, and a large amount of time is saved for project development.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic diagram of a front cover RO-DIP electrophoresis process according to the present invention;
FIG. 3 is a schematic view of supporting and positioning the front cover coating electrophoresis tool of the present invention;
FIG. 4 is a schematic view of the glue area of the front cover of the present invention;
FIG. 5 is a sectional view A-A of FIG. 4;
FIG. 6 is an enlarged partial schematic view of region B of FIG. 5;
FIG. 7 is an enlarged partial schematic view of region C of FIG. 5;
FIG. 8 is a diagram showing simulation analysis results of the front cover part gluing area and an optimized intermittent quantity curve.
In the figure, 1-front cover, 11-front cover inner plate, 12-front cover outer plate, 13-gluing area, 2-vehicle body, 3-tooling, H-clearance.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the method for predicting the turnover deformation of the front cover coating comprises the following steps:
and S1, collecting analysis parameters of the front cover under the RO-DIP electrophoresis overturning working condition in the design and development stage, namely collecting front cover part information, coating electrophoresis process parameters and tool supporting and positioning parameters. The part information comprises part material and thickness information, welding spot welding information, edge covering die pressure, friction coefficients of edge covering areas of the front cover inner plate and the front cover outer plate and the curved surface area of the front cover. The coating electrophoresis process parameters comprise the density and the flow rate of the electrophoresis liquid. The tool supporting and positioning parameters comprise positioning hole information, tool size data and a tool constraint mode on the front cover and the vehicle body.
S2, modeling each part of the front cover in ABAQUS software, including material and thickness definition, welding points and bolt connection, then establishing a wrapping model and packing the edge welding according to the actual state, wherein the processing mode of the wrapping model is as follows: referring to fig. 6, the periphery of the front cover outer plate 12 is folded and buckled with the front cover inner plate 11 through the CONTACT function of the ABAQUS software, and the friction coefficient between the front cover inner plate 11 and the front cover outer plate 12 is set, so that the consistency of the edge covering model and a real object is ensured.
Referring to fig. 2 and 3, a tool 3 is arranged between the front cover 1 and the vehicle body 2, so that the front cover 1 is always in an open state during electrophoresis overshoot, the tool 3 is a support rod, one end of the tool is inserted into a positioning hole of the vehicle body 2, and the other end of the tool is inserted into a positioning hole of the front cover 1. And then the front cover model is rotated in place according to the actual tool supporting state, the plane where the front cover is located is adjusted to be perpendicular to the flow direction of the electrophoretic fluid, and the resistance borne by the front cover in the state reaches the maximum, so that the deformation response of the front cover in the RO-DIP electrophoresis process can be more accurately obtained.
S3, calculating according to the coating electrophoresis process parameters to obtain the resistance of the front cover in the simulation analysis model, applying the resistance to the front cover inner plate 11 and the front cover outer plate 12, constraining the positioning holes on the front cover 1 and the vehicle body 2 according to the tool supporting and positioning parameters, and calculating through a nonlinear algorithm in ABAQUS software to obtain the deformation response of the front cover.
And S4, determining a clearance analysis value between the front cover inner plate and the front cover outer plate of the front cover gluing area according to the deformation response of the front cover, referring to the figures 4, 5 and 7, arranging a plurality of gluing areas 13 on the front cover, measuring the clearance H between the front cover inner plate 11 and the front cover outer plate 12 corresponding to the gluing area 1 according to the deformation response of the front cover after simulation analysis, and taking the clearance H as the clearance analysis value.
Six gluing areas are randomly selected on the front cover for analysis, and referring to fig. 8, the ordinate is the size of the gap amount in mm, and the abscissa is the serial number of the selected gluing area. And comparing the gap analysis value with a gap set value, evaluating the deformation degree of the front cover in the electrophoresis process, wherein the visible gap analysis value has larger change amplitude in different gluing areas and is far larger than the intermittent amount set value, which shows that the deformation degree of the front cover after RO-DIP electrophoresis is larger and the application requirement is difficult to meet.
Optimizing key factors and verifying through experiments; the key factors comprise the structure and thickness of the inner plate, the thickness of the outer plate, tool supporting and positioning parameters, the edge-covering friction coefficient and edge-covering welding process parameters.
The optimized front cover is analyzed according to the method for predicting the coating overturning deformation of the front cover, the result is shown in fig. 8, the change range of the optimized clearance analysis value in different gluing areas is small, and the whole clearance analysis value is closer to a clearance set value compared with the clearance analysis value before optimization, so that the optimization scheme has certain feasibility.
A front cover coating overturn deformation prediction device comprises: the information acquisition module is used for acquiring front cover part information, coating electrophoresis process parameters and tool supporting and positioning parameters in a design and development stage; the finite element modeling module is used for carrying out finite element modeling according to the front cover part information so as to generate a simulation analysis model of the front cover; the simulation analysis module is used for applying load and constraint to the simulation analysis model, calculating to obtain the deformation response of the front cover, and determining the analysis value of the gap amount between the front cover inner plate and the front cover outer plate of the front cover gluing area according to the deformation response of the front cover; and the deformation prediction module is used for comparing the gap analysis value with the gap set value and evaluating the deformation degree of the front cover in the electrophoresis process.
A storage medium having stored thereon a front cover paint rollover deformation prediction program that, when executed by a processor, implements the front cover paint rollover deformation prediction method described above.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for predicting the coating overturning deformation of a front cover is characterized by comprising the following steps:
s1, collecting front cover part information, coating electrophoresis process parameters and tool supporting and positioning parameters in a design and development stage;
s2, establishing a simulation analysis model based on the front cover part information, and adjusting the plane of the front cover in the simulation analysis model to be vertical to the electrophoretic fluid flowing direction;
s3, applying load and constraint to the simulation analysis model based on the coating electrophoresis process parameters and the tool supporting and positioning parameters, and calculating to obtain the deformation response of the front cover;
and S4, determining a clearance analysis value between the front cover inner plate and the front cover outer plate of the front cover gluing area according to the deformation response of the front cover, comparing the clearance analysis value with a clearance set value, and evaluating the deformation degree of the front cover in the electrophoresis process.
2. The front cover coating turnover deformation prediction method according to claim 1, characterized in that: the part information in the S1 comprises part material and thickness information, welding spot welding information, edge covering die pressure, friction coefficients of edge covering areas of the front cover inner plate and the front cover outer plate, and the curved surface area of the front cover.
3. The front cover coating turnover deformation prediction method according to claim 1 or 2, characterized in that: the coating electrophoresis process parameters in S1 include the density and flow rate of the electrophoresis liquid.
4. The front cover coating turnover deformation prediction method according to claim 1 or 2, characterized in that: and the tool supporting and positioning parameters in the S1 comprise positioning hole information, tool size data and tool constraint modes on the front cover and the vehicle body.
5. The front cover coating turnover deformation prediction method according to claim 1 or 2, wherein S2 is specifically: modeling each part of the front cover in ABAQUS software, including material and thickness definition, welding points and bolt connection, then establishing a wrapping model and packing the edge welding according to the actual state, then rotating the front cover model in place according to the actual tool supporting state, and then adjusting the plane of the front cover to be vertical to the flowing direction of the electrophoretic fluid.
6. The front cover coating turnover deformation prediction method according to claim 5, characterized in that the processing mode of the edge covering model is as follows: the periphery of the outer plate of the front cover is folded and buckled with the inner plate of the front cover through the CONTACT function of ABAQUS software, and the friction coefficient between the inner plate of the front cover and the outer plate of the front cover is set, so that the edge covering model is consistent with a real object.
7. The front cover coating turnover deformation prediction method according to claim 1 or 2, wherein S3 is specifically: calculating according to coating electrophoresis process parameters to obtain resistance borne by a front cover in a simulation analysis model, applying the resistance to a front cover inner plate and a front cover outer plate, constraining positioning holes in the front cover and a vehicle body according to tool supporting and positioning parameters, and calculating through a nonlinear algorithm in ABAQUS software to obtain deformation response of the front cover.
8. The front cover coating turnover deformation prediction method according to claim 1 or 2, characterized in that: if the evaluation result in the S4 is that the deformation degree of the front cover in the electrophoresis process is large, optimizing key factors and verifying the key factors through tests; the key factors comprise the structure and thickness of the inner plate, the thickness of the outer plate, tool supporting and positioning parameters, the edge-covering friction coefficient and edge-covering welding process parameters.
9. A front cover coating overturn deformation prediction device is characterized by comprising:
the information acquisition module is used for acquiring front cover part information, coating electrophoresis process parameters and tool supporting and positioning parameters in a design and development stage;
the finite element modeling module is used for carrying out finite element modeling according to the front cover part information so as to generate a simulation analysis model of the front cover;
the simulation analysis module is used for applying load and constraint to the simulation analysis model, calculating to obtain the deformation response of the front cover, and determining the analysis value of the gap amount between the front cover inner plate and the front cover outer plate of the front cover gluing area according to the deformation response of the front cover;
and the deformation prediction module is used for comparing the gap analysis value with the gap set value and evaluating the deformation degree of the front cover in the electrophoresis process.
10. A storage medium, characterized by: the storage medium stores a front cover paint turnover deformation prediction program which, when executed by a processor, implements the front cover paint turnover deformation prediction method according to any one of claims 1 to 8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115747919A (en) * | 2022-10-13 | 2023-03-07 | 东风柳州汽车有限公司 | Cab hole opening method, device, equipment and storage medium |
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| US20180165408A1 (en) * | 2015-03-12 | 2018-06-14 | Crrc Qingdao Sifang Co., Ltd. | Finite element simulation device and method for car body local structure instability of high-speed motor train unit |
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