CN111680439A - Compensation method for defects of surface products of automobile outer covering parts - Google Patents

Compensation method for defects of surface products of automobile outer covering parts Download PDF

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Publication number
CN111680439A
CN111680439A CN202010440365.1A CN202010440365A CN111680439A CN 111680439 A CN111680439 A CN 111680439A CN 202010440365 A CN202010440365 A CN 202010440365A CN 111680439 A CN111680439 A CN 111680439A
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China
Prior art keywords
compensation
product
defect
curved surface
flour
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CN202010440365.1A
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Inventor
闫巍
张健
王刚
李悦
冯岩
程保权
杨宏伟
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Faw Tooling Die Manufacturing Co ltd
FAW Group Corp
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Faw Tooling Die Manufacturing Co ltd
FAW Group Corp
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Priority to CN202010440365.1A priority Critical patent/CN111680439A/en
Publication of CN111680439A publication Critical patent/CN111680439A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation
    • G06F30/23Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/10Geometric CAD
    • G06F30/15Vehicle, aircraft or watercraft design
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/10Geometric CAD
    • G06F30/17Mechanical parametric or variational design
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00Details relating to the application field
    • G06F2113/22Moulding

Abstract

The invention discloses a compensation method for stamping surface defects of an automobile outer covering part, which comprises the steps of firstly adopting plate forming finite element analysis software to obtain a surface defect analysis result before compensation, compensating a product profile on the premise of ensuring that the quality of a curved surface does not change, outputting a compensated profile meeting the quality requirement of the surface, guiding the compensated profile of the plate forming finite element analysis software into Catia software, comparing the profile with the product profile before compensation to form a reference cloud picture of surface defect compensation quantity, and compensating the original product profile by manufacturing a driving curved surface according to the position and deviation quantity of the surface defect shown by the reference cloud picture to realize the compensation of the surface defects in the design stage. The invention can reduce the workload of manual grinding of a bench worker caused by the defect correction of the surface product, quickly improve the quality of the surface product of the outer covering part of the automobile and shorten the debugging period of the mold.

Description

Compensation method for defects of surface products of automobile outer covering parts
Technical Field
The invention belongs to the technical field of manufacturing of automobile covering part stamping dies, and particularly relates to a compensation method for defects of stamping surfaces of an automobile outer covering part.
Background
Under the background of increasingly competitive competition of the domestic automobile manufacturing industry, various large automobile manufacturers put higher requirements on the manufacturing quality of automobile bodies. In the case of an automobile outer cover, it is necessary to ensure not only its formability and dimensional accuracy but also its surface quality, which puts higher demands on the die equipment for producing stamped parts. At present, the manpower and material resources which are input around the quality improvement of the flour products of the outer covering part in the die debugging stage are gradually increased, and the main factors which restrict the production period and the cost of the die are formed.
The surface defects mainly refer to the defects of unevenness such as pits, bags, waves and the like existing on the surface of the automobile outer covering part, and as shown in fig. 1, the defects of wrinkles such as sliding lines, impact lines and the like, contour deviation and defects caused by dirty points of dies and plates are inevitable when an actual part B is compared with a theoretical part A. The slip line impact line is mainly solved by adjusting the inflow of the plate through early-stage CAE analysis, and the prejudgment and solving method of the defect is mature. The contour deviation mainly changes the flanging contour, the correction and modification amount is clear, and the correction and modification are relatively simple. The dirty points of the die belong to random factors in the production process and are eliminated mainly by ensuring the cleanness of the plate and the molded surface of the die. The uneven defects are determined by the production process or product modeling, and have large proportion in the surface defects of the outer covering part, large defect severity and maximum rectification cost.
The main methods for detecting the defects of the flour products comprise an oilstone polishing method, a light reflection method and a hand touch method, the three methods all depend on the experience of people to evaluate the outer covering part, quantitative evaluation standards are lacked, and artificial subjective errors exist. At present, the main method for correcting the defects of the flour products is that a bench worker manually grinds and repairs the male die at the position corresponding to the defects according to subjective detection results, when the defect degree of the flour products is too large, even the numerical control milling of the die profile is possibly needed, the die profile after numerical control machining still needs to be manually reground and repaired, the correcting time is long, and the cost is high. Therefore, in the development of the mold for the outer cover of the automobile, a method for rapidly improving the quality of the surface of the outer cover of the automobile by reducing the workload of bench workers for grinding and repairing the surface due to the defect of the surface is needed.
Disclosure of Invention
The invention aims to provide a compensation method for the defects of stamped automobile outer cover parts, which is used for compensating the theoretically existing defects of the automobile outer cover parts, wherein the defects of the automobile outer cover parts have large proportion and large defect severity and are determined by production processes or product shapes.
The technical scheme of the invention is realized as follows:
a method of compensating for defects in an automotive outer cover facestock, comprising the steps of:
step one, obtaining a flour product defect analysis result before compensation: constructing a flour product defect analysis file in plate forming finite element analysis software, and quantitatively evaluating the flour product defects in a post-processing module of the plate forming finite element software according to the curvature direction of a product to obtain a flour product defect analysis result before compensation;
step two, formulating a flour product defect compensation scheme:
2.1) product profile compensation: according to the analysis result of the defects of the face product before compensation obtained in the first step, the molded surface of the product is compensated in the plate forming finite element software according to the position and the magnitude of the defects of the face product before compensation;
2.2) evaluating the product profile compensation result: repeating the first step on the compensated product profile to analyze the flour product defects again, and verifying whether the compensation effect meets the specified quality requirement of the flour product defects; if the quality requirement of the specified flour product defect is not met, continuing to execute the second step until the compensation effect meets the quality requirement of the flour product defect;
2.3) outputting the compensated product profile: outputting a final compensated product profile in an igs format from the plate forming finite element analysis soft layer, and naming the final compensated product profile as Target;
step three, manufacturing a flour product defect compensation driving curved surface: making a reference cloud picture of the defect compensation quantity of the flour product: introducing the final compensated product profile Target data output in the step two into Catia software and taking the final compensated product profile Target data as a Target curved surface, taking the product curved surface before compensation as a reference curved surface, and performing deviation analysis on the point cloud data to obtain a reference cloud picture of the defect compensation amount of the surface product; making a rectangular plane by referring to the cloud picture according to the flour product defect compensation quantity; setting a curvature and a deformation center on a rectangular plane, and manufacturing a surface product defect compensation driving curved surface;
step four, making flour product defect compensation data: and in the Catia software, by taking the product curved surface before compensation as a reference curved surface and the flour product defect compensation driving curved surface manufactured in the step three as a target curved surface, manufacturing flour product defect compensation data in a driving compensation mode, and completing compensation of flour product defects.
Specifically, the step one of obtaining the analysis result of the defect of the flour product before compensation comprises the following steps:
1.1) defect finite element analysis of the product before compensation: constructing a surface defect analysis file in plate forming finite element analysis software, wherein plate parameters for analysis are set according to actual plate detection parameters, and unit types, tool grid sizes, initial plate grid sizes and refinement grade parameters are defined;
1.2) evaluating the defect result of the product before compensation: and quantitatively evaluating the defects of the flour products in a post-processing module of the plate forming finite element software according to the curvature direction of the products to obtain the analysis result of the defects of the flour products before compensation and obtain the specific positions and the values of the defects of the flour products.
Specifically, the step three of manufacturing the driving curved surface for compensating the defects of the flour product comprises the following steps:
3.1) making a flour product defect compensation quantity reference cloud picture: opening a digital Shape Editor module of Catia software, importing the finally compensated product profile Target data obtained in the step two into the Target curved surface, taking the product curved surface before compensation as a reference curved surface, and carrying out deviation analysis on the point cloud data to obtain a reference cloud picture of the defect compensation amount of the surface product, wherein the reference curved surface is named as Original product;
3.2) manufacturing a fixed plane: opening a free style module of Catia software, determining a compensation central point according to a flour product defect compensation position judged by referring to the cloud picture according to the flour product defect compensation amount, and establishing a normal coordinate system of a local curved surface at the central point position; manufacturing a rectangular plane on a normal plane of a normal coordinate system, wherein the rectangular plane is named as a Station, the center of the Station plane is overlapped with a compensation center, and the boundary of the Station plane exceeds the defect boundary of the flour product to be compensated;
3.3) manufacturing a driving curved surface: copying a Station plane, named Drive; and by utilizing a control point command in the free style module, setting the boundary of the Drive curved surface to be continuous in G2 curvature, taking the deformation center as a face defect compensation center, determining the maximum central deformation value according to the face defect compensation reference cloud picture, and ensuring that the deviation cloud picture of the fixed plane and the Drive curved surface is consistent with the face defect compensation reference cloud picture, thereby taking the deviation cloud picture as the final Drive curved surface.
Specifically, the step four of manufacturing the flour product defect compensation data comprises the following steps of:
4.1) performing drive compensation: utilizing a wrapping surface command in a Catia software-created shape design module, selecting an Original product surface for an element to be deformed, selecting a Station plane by referring to a surface, selecting a Drive surface for a target surface, and finishing surface defect compensation on a mold surface of a mold by taking a normal direction of a local surface as a driving direction;
4.2) repeating the third step and the fourth step to complete the compensation of the defects of the flour products at other positions;
4.3) quality inspection of the flour product defect compensation data: the method comprises curvature inspection and zebra crossing inspection, and ensures that the quality of the curved surface does not change before and after compensation.
Specifically, the specific positions and the magnitudes of the surface defects in the first step are obtained by plate forming finite element analysis software.
Specifically, the product profile compensation and the evaluation of the product profile compensation result in the second step are both completed in the finite element analysis software for plate forming.
The invention has the following advantages:
the invention can reduce the workload of manual grinding of a bench worker caused by the defect correction of the surface product, quickly improve the quality of the surface product of the outer covering part of the automobile and shorten the debugging period of the mold.
Drawings
FIG. 1 is a schematic view of a defect in a flour product;
FIG. 2 is a schematic view of a door panel product model of a certain vehicle type according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a result of analyzing a defect of a surface product before compensation of a door panel of a certain vehicle type according to an embodiment of the present invention;
FIG. 4 is a schematic view of a product curvature before compensation in Autoform software for a door panel of a certain vehicle type according to an embodiment of the present invention;
FIG. 5 is a schematic view of a product curvature of a door panel of a certain vehicle type compensated in an Autoform software according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a result of analyzing the defects of the compensated door panel of a certain vehicle according to an embodiment of the present invention;
FIG. 7 is a reference cloud chart of defect compensation amount of door panel surface products of a certain vehicle type according to an embodiment of the present invention;
FIG. 8 is a front and rear curvature inspection chart of defect compensation for door panel surface products of a certain vehicle type according to an embodiment of the present invention;
FIG. 9 is a zebra crossing inspection chart before and after defect compensation of a door panel surface product of a certain vehicle type according to an embodiment of the present invention;
FIG. 10 is an overall flow chart of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments, which are described herein for illustrative purposes only and are not intended to be limiting.
The overall working principle of the technical scheme of the invention is as follows: firstly, obtaining a face defect analysis result before compensation by adopting plate forming finite element analysis software, compensating a product profile on the premise of ensuring that the quality of a curved surface does not change, outputting a compensated profile meeting the quality requirement of the face product, then introducing the compensated profile of the plate forming finite element analysis software into Catia (Computer-graphics air Three-dimensional Interactive Application, Computer graphics assisted Three-dimensional Interactive Application) software, comparing the profile with the product profile before compensation to form a face defect compensation quantity reference cloud picture, compensating the original product profile by manufacturing a driving curved surface according to the face defect position and deviation quantity shown by the reference cloud picture, and realizing the compensation of the face defect in the design stage.
The technical scheme of the invention is as follows:
as shown in fig. 10, a method for compensating for defects in an automobile outer cover surface product includes the steps of:
step one, obtaining a surface product defect analysis result before compensation, and the substeps are as follows:
(1) compensating for the defect of the previous article by finite element analysis: and constructing a surface defect analysis file in plate forming finite element analysis software, wherein the parameters of the plate for analysis are set according to actual plate detection parameters, and the unit type, the tool grid size, the initial plate grid size and the refinement grade parameters are defined.
(2) Evaluating the defect result of the product before compensation: and quantitatively evaluating the defects of the flour products in a post-processing module of the plate forming finite element software according to the curvature direction of the products to obtain the analysis result of the defects of the flour products before compensation.
Step two, formulating a flour product defect compensation scheme, wherein the substeps are as follows:
(1) product profile compensation: according to the defect result of the product before compensation obtained in the first step, the position and the magnitude of the defect of the product before compensation are referred, the product profile is compensated in the plate forming finite element software, and the curved surface quality inspection is carried out on the compensated product profile, so that the quality of the curved surface before and after compensation is consistent.
(2) Evaluating a product profile compensation result: and analyzing the compensated product profile again according to the step of the first step, and verifying the compensation effect. Repeating the first step and the second step until the result meeting the quality requirement of the flour product defect (-0.03 mm- +0.03mm) is obtained.
(3) Outputting the compensated product profile: the final compensated product profile is output in igs format from the plate forming finite element analysis soft, named Target.
Step three, manufacturing a surface product defect compensation driving curved surface, and the substeps are as follows:
(1) making a reference cloud picture of the defect compensation quantity of the flour product: and (2) opening a digital Shape Editor module of Computer-graphics air-dimensional Interactive Application (Computer graphics-aided three-dimensional Interactive Application) software, importing Target data obtained in the step two into the Target surface as a Target surface, taking the surface of the product before compensation as a reference surface and naming the surface of the product before compensation as an Original product, and performing deviation analysis on the point cloud data to obtain a reference cloud picture of the defect compensation quantity of the surface.
(2) Manufacturing a fixed plane: and opening a free style module of Catia software, determining a compensation central point according to the flour product defect compensation position judged by referring to the cloud picture according to the flour product defect compensation amount, and establishing a normal coordinate system of the local curved surface at the central point position. And manufacturing a rectangular plane on a normal plane of a normal coordinate system, wherein the rectangular plane is named as a Station, the center of the Station plane is overlapped with the compensation center, and the boundary of the rectangular plane exceeds the defect boundary of the flour product to be compensated.
(3) Manufacturing a driving curved surface: copy Station plane, named Drive. And by utilizing a control point command in the free style module, setting the boundary of the Drive curved surface to be continuous in G2 curvature, taking the deformation center as a face defect compensation center, determining the maximum central deformation value according to the face defect compensation reference cloud picture, and ensuring that the deviation cloud picture of the fixed plane and the Drive curved surface is consistent with the face defect compensation reference cloud picture, thereby taking the deviation cloud picture as the final Drive curved surface.
Step four, making flour product defect compensation data, and the substeps are as follows:
(1) and (3) performing drive compensation: the method comprises the steps of utilizing a wrapping surface command in a Catia software-created shape design module, selecting an Original product surface for an element to be deformed, selecting a Station plane by referring to a surface, selecting a Drive surface by a target surface, and completing surface defect compensation of a mold surface by taking the normal direction of a local surface as a driving direction.
(2) And repeating the third step and the fourth step to complete the compensation of the defects of the flour products at other positions.
(3) Quality inspection of flour product defect compensation data: the method comprises curvature inspection and zebra crossing inspection, and ensures that the quality of the curved surface does not change before and after compensation.
Further, the specific positions and the values of the surface defects in the first step are obtained by plate forming finite element analysis software.
Further, the product profile compensation and the product profile compensation result evaluation in the second step are finished in the finite element analysis software for plate forming.
Furthermore, the flour product defect compensation data in the fourth step is manufactured in a driving compensation mode.
Examples
A door plate product model of a certain vehicle type is shown in fig. 2, and after a stamping process design is completed according to the model, defects of the door plate product need to be compensated, and the method comprises the following specific steps:
the method comprises the following steps of firstly, obtaining a defect analysis result of a flour product before compensation, wherein the substeps are as follows:
(1) compensating for the defect of the previous article by finite element analysis: a face defect analysis file was constructed in the board forming finite element analysis software auto. Wherein, the material parameters are shown in table 1, and the tool and plate grid size parameters are shown in table 2.
TABLE 1 door plank Material parameters of a certain vehicle type
TABLE 2 tool and sheet grid size parameters
(2) Evaluating the defect result of the product before compensation: quantitative Evaluation of the Surface defect is performed in Evaluation of auto software by using a Surface command according to the curvature direction of the product, and a Surface defect analysis result before compensation is obtained, as shown in fig. 3.
Secondly, formulating a flour product defect compensation scheme:
(1) product profile compensation: and according to the defect result of the product before compensation obtained in the first step, compensating the molded surface of the product by using a Morph command in the Modify of the Autoform software and referring to the position and the magnitude of the defect before compensation. The compensated product profile is subjected to curved surface quality inspection by using a Curvature Cases command, and the quality of the curved surface before and after compensation is ensured not to change, as shown in figures 4 and 5.
(2) Evaluating a product profile compensation result: the compensated product profile is analyzed with reference to the first step, verifying the compensation effect, as shown in fig. 6.
(3) Outputting the compensated product profile: and outputting the final compensated product profile in igs format from the Autoform software, and naming the final compensated product profile as Target.
Thirdly, manufacturing a flour product defect compensation driving curved surface:
(1) making a reference cloud picture of the defect compensation quantity of the flour product: and opening a digital Shape Editor module of Catia software, importing Target data obtained in the second step into the Target curved surface as a Target curved surface, taking the product curved surface before compensation as a reference curved surface, and performing deviation analysis on the point cloud data to obtain a reference cloud picture of the defect compensation amount of the flour product, wherein the reference cloud picture is shown in FIG. 7.
(2) Manufacturing a fixed plane: and opening a free style module of Catia software, determining a compensation central point according to the flour product defect compensation position judged by referring to the cloud picture according to the flour product defect compensation amount, and establishing a normal coordinate system of the local curved surface at the central point position. And manufacturing a rectangular plane on a normal plane of a normal coordinate system, wherein the rectangular plane is named as Station, the center of the Station plane is superposed with the compensation center, and the boundary of the rectangular curved surface exceeds the defect boundary of the flour product to be compensated. Taking a flour product defect area with the defect depth of 0.2mm as an example, the fixed plane size is adjusted as follows: the length is 280mm, and the width is 130 mm.
(3) Manufacturing a driving curved surface: copy the Station surface, named Drive. And setting the boundary of the Drive curved surface to be continuous in G2 curvature by using a control point command in the free style module, taking the deformation center as a face defect compensation center, and determining the maximum deformation value of the center to be 0.25mm according to the face defect compensation amount reference cloud picture.
Fourthly, making flour product defect compensation data:
(1) and (3) performing drive compensation: the method comprises the steps of utilizing a wrapping surface command in a Catia software-created shape design module, selecting an Original product surface for an element to be deformed, selecting a Station plane by referring to a surface, selecting a Drive surface by a target surface, and completing surface defect compensation of a mold surface by taking the normal direction of a local surface as a driving direction.
(2) And repeating the third step and the fourth step to complete the compensation of the flour product defects at other positions.
(3) Quality inspection of flour product defect compensation data: including curvature inspection and zebra crossing inspection, to ensure that the quality of the curved surface before and after compensation does not change, as shown in fig. 8 and 9.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A method of compensating for defects in an automotive outer cover facestock, comprising the steps of:
step one, obtaining a flour product defect analysis result before compensation: constructing a flour product defect analysis file in plate forming finite element analysis software, and quantitatively evaluating the flour product defects in a post-processing module of the plate forming finite element software according to the curvature direction of a product to obtain a flour product defect analysis result before compensation;
step two, formulating a flour product defect compensation scheme:
2.1) product profile compensation: according to the analysis result of the defects of the face product before compensation obtained in the first step, the molded surface of the product is compensated in the plate forming finite element software according to the position and the magnitude of the defects of the face product before compensation;
2.2) evaluating the product profile compensation result: repeating the first step on the compensated product profile to analyze the flour product defects again, and verifying whether the compensation effect meets the specified quality requirement of the flour product defects; if the quality requirement of the specified flour product defect is not met, continuing to execute the second step until the compensation effect meets the quality requirement of the flour product defect;
2.3) outputting the compensated product profile: outputting a final compensated product profile in an igs format from the plate forming finite element analysis soft layer, and naming the final compensated product profile as Target;
step three, manufacturing a flour product defect compensation driving curved surface: making a reference cloud picture of the defect compensation quantity of the flour product: introducing the final compensated product profile Target data output in the step two into Catia software and taking the final compensated product profile Target data as a Target curved surface, taking the product curved surface before compensation as a reference curved surface, and performing deviation analysis on the point cloud data to obtain a reference cloud picture of the defect compensation amount of the surface product; making a rectangular plane by referring to the cloud picture according to the flour product defect compensation quantity; setting a curvature and a deformation center on a rectangular plane, and manufacturing a surface product defect compensation driving curved surface;
step four, making flour product defect compensation data: and in the Catia software, by taking the product curved surface before compensation as a reference curved surface and the flour product defect compensation driving curved surface manufactured in the step three as a target curved surface, manufacturing flour product defect compensation data in a driving compensation mode, and completing compensation of flour product defects.
2. A method for compensating for defects in an automobile outer cover panel as claimed in claim 1, wherein said step one of obtaining a pre-compensation panel defect analysis comprises the steps of:
1.1) defect finite element analysis of the product before compensation: constructing a surface defect analysis file in plate forming finite element analysis software, wherein plate parameters for analysis are set according to actual plate detection parameters, and unit types, tool grid sizes, initial plate grid sizes and refinement grade parameters are defined;
1.2) evaluating the defect result of the product before compensation: and quantitatively evaluating the defects of the flour products in a post-processing module of the plate forming finite element software according to the curvature direction of the products to obtain the analysis result of the defects of the flour products before compensation and obtain the specific positions and the values of the defects of the flour products.
3. A method of compensating for imperfections in an automotive outer cover facestock according to claim 1, wherein said step of tri-forming a facestock imperfection compensating driving curve comprises the steps of:
3.1) making a flour product defect compensation quantity reference cloud picture: opening a digital Shape Editor module of Catia software, importing the finally compensated product profile Target data obtained in the step two into the Target curved surface, taking the product curved surface before compensation as a reference curved surface, and carrying out deviation analysis on the point cloud data to obtain a reference cloud picture of the defect compensation amount of the surface product, wherein the reference curved surface is named as Original product;
3.2) manufacturing a fixed plane: opening a free style module of Catia software, determining a compensation central point according to a flour product defect compensation position judged by referring to the cloud picture according to the flour product defect compensation amount, and establishing a normal coordinate system of a local curved surface at the central point position; manufacturing a rectangular plane on a normal plane of a normal coordinate system, wherein the rectangular plane is named as a Station, the center of the Station plane is overlapped with a compensation center, and the boundary of the Station plane exceeds the defect boundary of the flour product to be compensated;
3.3) manufacturing a driving curved surface: copying a Station plane, named Drive; and by utilizing a control point command in the free style module, setting the boundary of the Drive curved surface to be continuous in G2 curvature, taking the deformation center as a face defect compensation center, determining the maximum central deformation value according to the face defect compensation reference cloud picture, and ensuring that the deviation cloud picture of the fixed plane and the Drive curved surface is consistent with the face defect compensation reference cloud picture, thereby taking the deviation cloud picture as the final Drive curved surface.
4. A method of compensating for defects in an automotive outer cover facestock according to claim 1, wherein the step four of making facestock defect compensation data comprises the steps of:
4.1) performing drive compensation: utilizing a wrapping surface command in a Catia software-created shape design module, selecting an origin product surface for an element to be deformed, selecting a Station plane by referring to a surface, selecting a Drive surface for a target surface, and finishing surface defect compensation on a mold surface of a mold by taking a normal direction of a local surface as a driving direction;
4.2) repeating the third step and the fourth step to complete the compensation of the defects of the flour products at other positions;
4.3) quality inspection of the flour product defect compensation data: the method comprises curvature inspection and zebra crossing inspection, and ensures that the quality of the curved surface does not change before and after compensation.
5. The method of claim 1, wherein the specific location and magnitude of the surface defect in the first step is obtained by plate forming finite element analysis software.
6. A method of compensating for defects in an automobile outer cover panel as in claim 1, wherein the product profile compensation and the product profile compensation evaluation in step two are performed in a sheet forming finite element analysis software.
CN202010440365.1A 2020-05-22 2020-05-22 Compensation method for defects of surface products of automobile outer covering parts Pending CN111680439A (en)

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CN114734213A (en) * 2022-06-10 2022-07-12 眉山博雅新材料股份有限公司 Mould processing method and system

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CN110738005A (en) * 2019-10-29 2020-01-31 上汽大众汽车有限公司 Full profile compensation method for stamping and rebounding automobile fender
CN110909462A (en) * 2019-11-13 2020-03-24 中国第一汽车股份有限公司 Control cabinet automatic wiring method based on virtual environment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112476164A (en) * 2020-10-16 2021-03-12 中国第一汽车股份有限公司 Method for manually correcting defects of convex surface of die
CN113333503A (en) * 2021-05-11 2021-09-03 中国第一汽车股份有限公司 Debugging method for controlling stamping slip line
CN114734213A (en) * 2022-06-10 2022-07-12 眉山博雅新材料股份有限公司 Mould processing method and system

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